<article>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#article10_01_23_152229</id>
	<title>Skydiver To Break Sound Barrier During Free-Fall</title>
	<author>Soulskill</author>
	<datestamp>1264262640000</datestamp>
	<htmltext><a href="http://hughpickens.com/" rel="nofollow">Hugh Pickens</a> writes <i>"Over fifty years ago, American Joe Kittinger made history by <a href="http://www.centennialofflight.gov/essay/Explorers\_Record\_Setters\_and\_Daredevils/Kittinger/EX31.htm">leaping from a balloon at 102,800 ft</a>, and although many have sought to repeat the feat, all have failed. Now, BBC reports that Austrian extreme sportsman Felix Baumgartner will try to break the <a href="http://news.bbc.co.uk/2/hi/science/nature/8475288.stm">long-standing record for the highest ever parachute jump</a>, skydiving from a balloon sent to at least 120,000 ft, and it is likely that 35 seconds into in his long free-fall of more than five minutes, he will exceed the speed of sound &mdash; the first person to do so without the aid of a machine. 'No-one really knows what that will be like,' says Baumgartner. Although challenges in the endeavor include coping with freezing temperatures and ultra-thin air, a key objective for Baumgartner will be to try to maintain a good attitude during the descent and prevent his body from going into a spin and blacking out. 'The fact is you have a lot of different airflows coming around your body; and some parts of your body are in supersonic flow and some parts are in transonic flow. What kind of reaction that creates, I can't tell you,' adds Baumgartner."</i></htmltext>
<tokenext>Hugh Pickens writes " Over fifty years ago , American Joe Kittinger made history by leaping from a balloon at 102,800 ft , and although many have sought to repeat the feat , all have failed .
Now , BBC reports that Austrian extreme sportsman Felix Baumgartner will try to break the long-standing record for the highest ever parachute jump , skydiving from a balloon sent to at least 120,000 ft , and it is likely that 35 seconds into in his long free-fall of more than five minutes , he will exceed the speed of sound    the first person to do so without the aid of a machine .
'No-one really knows what that will be like, ' says Baumgartner .
Although challenges in the endeavor include coping with freezing temperatures and ultra-thin air , a key objective for Baumgartner will be to try to maintain a good attitude during the descent and prevent his body from going into a spin and blacking out .
'The fact is you have a lot of different airflows coming around your body ; and some parts of your body are in supersonic flow and some parts are in transonic flow .
What kind of reaction that creates , I ca n't tell you, ' adds Baumgartner .
"</tokentext>
<sentencetext>Hugh Pickens writes "Over fifty years ago, American Joe Kittinger made history by leaping from a balloon at 102,800 ft, and although many have sought to repeat the feat, all have failed.
Now, BBC reports that Austrian extreme sportsman Felix Baumgartner will try to break the long-standing record for the highest ever parachute jump, skydiving from a balloon sent to at least 120,000 ft, and it is likely that 35 seconds into in his long free-fall of more than five minutes, he will exceed the speed of sound — the first person to do so without the aid of a machine.
'No-one really knows what that will be like,' says Baumgartner.
Although challenges in the endeavor include coping with freezing temperatures and ultra-thin air, a key objective for Baumgartner will be to try to maintain a good attitude during the descent and prevent his body from going into a spin and blacking out.
'The fact is you have a lot of different airflows coming around your body; and some parts of your body are in supersonic flow and some parts are in transonic flow.
What kind of reaction that creates, I can't tell you,' adds Baumgartner.
"</sentencetext>
</article>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870392</id>
	<title>Re:Failed how?</title>
	<author>FilePeter</author>
	<datestamp>1264269180000</datestamp>
	<modclass>Funny</modclass>
	<modscore>2</modscore>
	<htmltext><p>A Frenchman called Michel Fournier spent years preparing to beat the record, only to watch his balloon detach from the capsule and float away without him. I believe the term is EPIC FAIL.</p><p><a href="http://en.wikipedia.org/wiki/Michel\_Fournier\_(adventurer)" title="wikipedia.org" rel="nofollow">http://en.wikipedia.org/wiki/Michel\_Fournier\_(adventurer)</a> [wikipedia.org]</p></htmltext>
<tokenext>A Frenchman called Michel Fournier spent years preparing to beat the record , only to watch his balloon detach from the capsule and float away without him .
I believe the term is EPIC FAIL.http : //en.wikipedia.org/wiki/Michel \ _Fournier \ _ ( adventurer ) [ wikipedia.org ]</tokentext>
<sentencetext>A Frenchman called Michel Fournier spent years preparing to beat the record, only to watch his balloon detach from the capsule and float away without him.
I believe the term is EPIC FAIL.http://en.wikipedia.org/wiki/Michel\_Fournier\_(adventurer) [wikipedia.org]</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870078</id>
	<title>Anyone else think..</title>
	<author>Anonymous</author>
	<datestamp>1264266600000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext><p>So I guess I'm not the only one to think this guy is going to die doing this stunt.</p></htmltext>
<tokenext>So I guess I 'm not the only one to think this guy is going to die doing this stunt .</tokentext>
<sentencetext>So I guess I'm not the only one to think this guy is going to die doing this stunt.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874826</id>
	<title>Re:Physics novice, here:</title>
	<author>selven</author>
	<datestamp>1264260720000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext><p>The guy's starting at over 36km. Air pressure is about <a href="http://www.wolframalpha.com/input/?i=air+pressure+at+36000m" title="wolframalpha.com">one 200th that of surface pressure</a> [wolframalpha.com]. Given that the acceleration needed to counter drag increases with velocity^2 (if you're going twice as fast, twice as many air particles hit you at twice the relative velocity), that means that terminal velocity is 14 times as high as usual. Terminal velocity at the surface for a mostly vertical human with gear (I estimated 0.30m^2) is <a href="http://www.wolframalpha.com/input/?i=terminal+velocity&amp;a=*C.terminal+velocity-\_*Formula.dflt-&amp;f2=100+ft&amp;f=TimeToFall.h\_100+ft&amp;f3=100+ft&amp;f=TimeToFall.H\_100+ft&amp;f4=70+kg&amp;f=TimeToFall.m\_70+kg&amp;f5=1.22+kg/m\%5E3&amp;f=TimeToFall.rho\_1.22+kg/m\%5E3&amp;f6=0.1&amp;f=TimeToFall.Cd\_0.1&amp;f7=0.30+m\%5E2&amp;f=TimeToFall.A\_0.30+m\%5E2&amp;a=*FVarOpt.1-\_***TimeToFall.H-.*TimeToFall.h-.*TimeToFall.m-.*TimeToFall.Cd-.*TimeToFall.rho-.*TimeToFall.A--.***TimeToFall.d---.*--" title="wolframalpha.com"> 200 m/s</a> [wolframalpha.com], so up there the terminal velocity is over 2800 m/s, or about 9.5 times the speed of sound at that elevation.</p></htmltext>
<tokenext>The guy 's starting at over 36km .
Air pressure is about one 200th that of surface pressure [ wolframalpha.com ] .
Given that the acceleration needed to counter drag increases with velocity ^ 2 ( if you 're going twice as fast , twice as many air particles hit you at twice the relative velocity ) , that means that terminal velocity is 14 times as high as usual .
Terminal velocity at the surface for a mostly vertical human with gear ( I estimated 0.30m ^ 2 ) is 200 m/s [ wolframalpha.com ] , so up there the terminal velocity is over 2800 m/s , or about 9.5 times the speed of sound at that elevation .</tokentext>
<sentencetext>The guy's starting at over 36km.
Air pressure is about one 200th that of surface pressure [wolframalpha.com].
Given that the acceleration needed to counter drag increases with velocity^2 (if you're going twice as fast, twice as many air particles hit you at twice the relative velocity), that means that terminal velocity is 14 times as high as usual.
Terminal velocity at the surface for a mostly vertical human with gear (I estimated 0.30m^2) is  200 m/s [wolframalpha.com], so up there the terminal velocity is over 2800 m/s, or about 9.5 times the speed of sound at that elevation.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870456</id>
	<title>Re:Just use a dummy first.</title>
	<author>Anonymous</author>
	<datestamp>1264269600000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>starbugs wrote, "Just use a dummy first."</p><p>As a pilot who built and flies his own homebuilt airplane (a Rutan designed Long-EZ), and as one who has slipped the surly bonds of earth for 30+ years in various aircraft, and as one who has perhaps done a few foolish things in such aircraft, I submit that when Baumgartner jumps out of his balloon at 120k ft, *he* will be the dummy jumping.  I suppose some people just have a death wish.</p></htmltext>
<tokenext>starbugs wrote , " Just use a dummy first .
" As a pilot who built and flies his own homebuilt airplane ( a Rutan designed Long-EZ ) , and as one who has slipped the surly bonds of earth for 30 + years in various aircraft , and as one who has perhaps done a few foolish things in such aircraft , I submit that when Baumgartner jumps out of his balloon at 120k ft , * he * will be the dummy jumping .
I suppose some people just have a death wish .</tokentext>
<sentencetext>starbugs wrote, "Just use a dummy first.
"As a pilot who built and flies his own homebuilt airplane (a Rutan designed Long-EZ), and as one who has slipped the surly bonds of earth for 30+ years in various aircraft, and as one who has perhaps done a few foolish things in such aircraft, I submit that when Baumgartner jumps out of his balloon at 120k ft, *he* will be the dummy jumping.
I suppose some people just have a death wish.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870298</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30894624</id>
	<title>Re:The real question is ...</title>
	<author>fulldecent</author>
	<datestamp>1264452780000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>will he blend?</p></htmltext>
<tokenext>will he blend ?</tokentext>
<sentencetext>will he blend?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871342</id>
	<title>Re:Just use a dummy first.</title>
	<author>confused one</author>
	<datestamp>1264276560000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>OK, you've hit on the best idea right there!  Get Mythbusters to test his idea first.  If Buster (the dummy) survives, then out come the explosives!</htmltext>
<tokenext>OK , you 've hit on the best idea right there !
Get Mythbusters to test his idea first .
If Buster ( the dummy ) survives , then out come the explosives !</tokentext>
<sentencetext>OK, you've hit on the best idea right there!
Get Mythbusters to test his idea first.
If Buster (the dummy) survives, then out come the explosives!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870298</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872672</id>
	<title>Re:Failed how?</title>
	<author>Better.Safe.Than.Sor</author>
	<datestamp>1264242480000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>You've never been employed by any government I see.</htmltext>
<tokenext>You 've never been employed by any government I see .</tokentext>
<sentencetext>You've never been employed by any government I see.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870068</id>
	<title>Your official guide to the Jigaboo presidency</title>
	<author>Anonymous</author>
	<datestamp>1264266540000</datestamp>
	<modclass>Troll</modclass>
	<modscore>-1</modscore>
	<htmltext><p>Congratulations on your purchase of a brand new nigger! If handled<br>properly, your apeman will give years of valuable, if reluctant, service.</p><p>INSTALLING YOUR NIGGER.<br>You should install your nigger differently according to whether you have<br>purchased the field or house model. Field niggers work best in a serial<br>configuration, i.e. chained together. Chain your nigger to another<br>nigger immediately after unpacking it, and don't even think about taking<br>that chain off, ever. Many niggers start singing as soon as you put a<br>chain on them. This habit can usually be thrashed out of them if nipped<br>in the bud. House niggers work best as standalone units, but should be<br>hobbled or hamstrung to prevent attempts at escape. At this stage, your<br>nigger can also be given a name. Most owners use the same names over and<br>over, since niggers become confused by too much data. Rufus, Rastus,<br>Remus, Toby, Carslisle, Carlton, Hey-You!-Yes-you!, Yeller, Blackstar,<br>and Sambo are all effective names for your new buck nigger. If your<br>nigger is a ho, it should be called Latrelle, L'Tanya, or Jemima. Some<br>owners call their nigger hoes Latrine for a joke. Pearl, Blossom, and<br>Ivory are also righteous names for nigger hoes. These names go straight<br>over your nigger's head, by the way.</p><p>CONFIGURING YOUR NIGGER<br>Owing to a design error, your nigger comes equipped with a tongue and<br>vocal chords. Most niggers can master only a few basic human phrases<br>with this apparatus - "muh dick" being the most popular. However, others<br>make barking, yelping, yapping noises and appear to be in some pain, so<br>you should probably call a vet and have him remove your nigger's tongue.<br>Once de-tongued your nigger will be a lot happier - at least, you won't<br>hear it complaining anywhere near as much. Niggers have nothing<br>interesting to say, anyway. Many owners also castrate their niggers for<br>health reasons (yours, mine, and that of women, not the nigger's). This<br>is strongly recommended, and frankly, it's a mystery why this is not<br>done on the boat</p><p>HOUSING YOUR NIGGER.<br>Your nigger can be accommodated in cages with stout iron bars. Make<br>sure, however, that the bars are wide enough to push pieces of nigger<br>food through. The rule of thumb is, four niggers per square yard of<br>cage. So a fifteen foot by thirty foot nigger cage can accommodate two<br>hundred niggers. You can site a nigger cage anywhere, even on soft<br>ground. Don't worry about your nigger fashioning makeshift shovels out<br>of odd pieces of wood and digging an escape tunnel under the bars of the<br>cage. Niggers never invented the shovel before and they're not about to<br>now. In any case, your nigger is certainly too lazy to attempt escape.<br>As long as the free food holds out, your nigger is living better than it<br>did in Africa, so it will stay put. Buck niggers and hoe niggers can be<br>safely accommodated in the same cage, as bucks never attempt sex with<br>black hoes.</p><p>FEEDING YOUR NIGGER.<br>Your Nigger likes fried chicken, corn bread, and watermelon. You should<br>therefore give it none of these things because its lazy ass almost<br>certainly doesn't deserve it. Instead, feed it on porridge with salt,<br>and creek water. Your nigger will supplement its diet with whatever it<br>finds in the fields, other niggers, etc. Experienced nigger owners<br>sometimes push watermelon slices through the bars of the nigger cage at<br>the end of the day as a treat, but only if all niggers have worked well<br>and nothing has been stolen that day. Mike of the Old Ranch Plantation<br>reports that this last one is a killer, since all niggers steal<br>something almost every single day of their lives. He reports he doesn't<br>have to spend much on free watermelon for his niggers as a result. You<br>should never allow your nigger meal breaks while at work, since if it<br>stops work for more than ten minutes it will need to be retrained. You<br>would be surprised how long it takes to teach a nigger to pick cotton.<br>You rea</p></htmltext>
<tokenext>Congratulations on your purchase of a brand new nigger !
If handledproperly , your apeman will give years of valuable , if reluctant , service.INSTALLING YOUR NIGGER.You should install your nigger differently according to whether you havepurchased the field or house model .
Field niggers work best in a serialconfiguration , i.e .
chained together .
Chain your nigger to anothernigger immediately after unpacking it , and do n't even think about takingthat chain off , ever .
Many niggers start singing as soon as you put achain on them .
This habit can usually be thrashed out of them if nippedin the bud .
House niggers work best as standalone units , but should behobbled or hamstrung to prevent attempts at escape .
At this stage , yournigger can also be given a name .
Most owners use the same names over andover , since niggers become confused by too much data .
Rufus , Rastus,Remus , Toby , Carslisle , Carlton , Hey-You ! -Yes-you ! , Yeller , Blackstar,and Sambo are all effective names for your new buck nigger .
If yournigger is a ho , it should be called Latrelle , L'Tanya , or Jemima .
Someowners call their nigger hoes Latrine for a joke .
Pearl , Blossom , andIvory are also righteous names for nigger hoes .
These names go straightover your nigger 's head , by the way.CONFIGURING YOUR NIGGEROwing to a design error , your nigger comes equipped with a tongue andvocal chords .
Most niggers can master only a few basic human phraseswith this apparatus - " muh dick " being the most popular .
However , othersmake barking , yelping , yapping noises and appear to be in some pain , soyou should probably call a vet and have him remove your nigger 's tongue.Once de-tongued your nigger will be a lot happier - at least , you won'thear it complaining anywhere near as much .
Niggers have nothinginteresting to say , anyway .
Many owners also castrate their niggers forhealth reasons ( yours , mine , and that of women , not the nigger 's ) .
Thisis strongly recommended , and frankly , it 's a mystery why this is notdone on the boatHOUSING YOUR NIGGER.Your nigger can be accommodated in cages with stout iron bars .
Makesure , however , that the bars are wide enough to push pieces of niggerfood through .
The rule of thumb is , four niggers per square yard ofcage .
So a fifteen foot by thirty foot nigger cage can accommodate twohundred niggers .
You can site a nigger cage anywhere , even on softground .
Do n't worry about your nigger fashioning makeshift shovels outof odd pieces of wood and digging an escape tunnel under the bars of thecage .
Niggers never invented the shovel before and they 're not about tonow .
In any case , your nigger is certainly too lazy to attempt escape.As long as the free food holds out , your nigger is living better than itdid in Africa , so it will stay put .
Buck niggers and hoe niggers can besafely accommodated in the same cage , as bucks never attempt sex withblack hoes.FEEDING YOUR NIGGER.Your Nigger likes fried chicken , corn bread , and watermelon .
You shouldtherefore give it none of these things because its lazy ass almostcertainly does n't deserve it .
Instead , feed it on porridge with salt,and creek water .
Your nigger will supplement its diet with whatever itfinds in the fields , other niggers , etc .
Experienced nigger ownerssometimes push watermelon slices through the bars of the nigger cage atthe end of the day as a treat , but only if all niggers have worked welland nothing has been stolen that day .
Mike of the Old Ranch Plantationreports that this last one is a killer , since all niggers stealsomething almost every single day of their lives .
He reports he doesn'thave to spend much on free watermelon for his niggers as a result .
Youshould never allow your nigger meal breaks while at work , since if itstops work for more than ten minutes it will need to be retrained .
Youwould be surprised how long it takes to teach a nigger to pick cotton.You rea</tokentext>
<sentencetext>Congratulations on your purchase of a brand new nigger!
If handledproperly, your apeman will give years of valuable, if reluctant, service.INSTALLING YOUR NIGGER.You should install your nigger differently according to whether you havepurchased the field or house model.
Field niggers work best in a serialconfiguration, i.e.
chained together.
Chain your nigger to anothernigger immediately after unpacking it, and don't even think about takingthat chain off, ever.
Many niggers start singing as soon as you put achain on them.
This habit can usually be thrashed out of them if nippedin the bud.
House niggers work best as standalone units, but should behobbled or hamstrung to prevent attempts at escape.
At this stage, yournigger can also be given a name.
Most owners use the same names over andover, since niggers become confused by too much data.
Rufus, Rastus,Remus, Toby, Carslisle, Carlton, Hey-You!-Yes-you!, Yeller, Blackstar,and Sambo are all effective names for your new buck nigger.
If yournigger is a ho, it should be called Latrelle, L'Tanya, or Jemima.
Someowners call their nigger hoes Latrine for a joke.
Pearl, Blossom, andIvory are also righteous names for nigger hoes.
These names go straightover your nigger's head, by the way.CONFIGURING YOUR NIGGEROwing to a design error, your nigger comes equipped with a tongue andvocal chords.
Most niggers can master only a few basic human phraseswith this apparatus - "muh dick" being the most popular.
However, othersmake barking, yelping, yapping noises and appear to be in some pain, soyou should probably call a vet and have him remove your nigger's tongue.Once de-tongued your nigger will be a lot happier - at least, you won'thear it complaining anywhere near as much.
Niggers have nothinginteresting to say, anyway.
Many owners also castrate their niggers forhealth reasons (yours, mine, and that of women, not the nigger's).
Thisis strongly recommended, and frankly, it's a mystery why this is notdone on the boatHOUSING YOUR NIGGER.Your nigger can be accommodated in cages with stout iron bars.
Makesure, however, that the bars are wide enough to push pieces of niggerfood through.
The rule of thumb is, four niggers per square yard ofcage.
So a fifteen foot by thirty foot nigger cage can accommodate twohundred niggers.
You can site a nigger cage anywhere, even on softground.
Don't worry about your nigger fashioning makeshift shovels outof odd pieces of wood and digging an escape tunnel under the bars of thecage.
Niggers never invented the shovel before and they're not about tonow.
In any case, your nigger is certainly too lazy to attempt escape.As long as the free food holds out, your nigger is living better than itdid in Africa, so it will stay put.
Buck niggers and hoe niggers can besafely accommodated in the same cage, as bucks never attempt sex withblack hoes.FEEDING YOUR NIGGER.Your Nigger likes fried chicken, corn bread, and watermelon.
You shouldtherefore give it none of these things because its lazy ass almostcertainly doesn't deserve it.
Instead, feed it on porridge with salt,and creek water.
Your nigger will supplement its diet with whatever itfinds in the fields, other niggers, etc.
Experienced nigger ownerssometimes push watermelon slices through the bars of the nigger cage atthe end of the day as a treat, but only if all niggers have worked welland nothing has been stolen that day.
Mike of the Old Ranch Plantationreports that this last one is a killer, since all niggers stealsomething almost every single day of their lives.
He reports he doesn'thave to spend much on free watermelon for his niggers as a result.
Youshould never allow your nigger meal breaks while at work, since if itstops work for more than ten minutes it will need to be retrained.
Youwould be surprised how long it takes to teach a nigger to pick cotton.You rea</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873574</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264249140000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p><div class="quote"><p>If you fart while exceeding the speed of sound, will it make a noise?</p></div><p>Yes; it's called a sonic boom</p></div>
	</htmltext>
<tokenext>If you fart while exceeding the speed of sound , will it make a noise ? Yes ; it 's called a sonic boom</tokentext>
<sentencetext>If you fart while exceeding the speed of sound, will it make a noise?Yes; it's called a sonic boom
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870912</id>
	<title>Re:A simple machine</title>
	<author>defaria</author>
	<datestamp>1264273380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>He is not using a machine to accelerate down however.

I don't understand. The article says he'll reach the speed of sound at 35 seconds in. It also says that Kittinger's fall lasted minutes. Why then did Kittinger not break the sound barrier after 35 seconds into hist descent?</htmltext>
<tokenext>He is not using a machine to accelerate down however .
I do n't understand .
The article says he 'll reach the speed of sound at 35 seconds in .
It also says that Kittinger 's fall lasted minutes .
Why then did Kittinger not break the sound barrier after 35 seconds into hist descent ?</tokentext>
<sentencetext>He is not using a machine to accelerate down however.
I don't understand.
The article says he'll reach the speed of sound at 35 seconds in.
It also says that Kittinger's fall lasted minutes.
Why then did Kittinger not break the sound barrier after 35 seconds into hist descent?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870348</id>
	<title>Re:Failed how?</title>
	<author>MustardAndPizza</author>
	<datestamp>1264268880000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Actually, if you RTA, the previous attempt <i>epic</i> failed. The guy was about to climb into the balloon when the balloon broke free and left for the sky without him.<br>
<br>
That's almost as funny as missing the ground. Maybe Baumgartner will accidentally open a hyperspace window and end up on the other side of the earth...
<br>
<br>
----
<br>
<i>One day, I accidentally ate a screwdriver instead of a corndog. I thought to myself, This would make a good signature.</i></htmltext>
<tokenext>Actually , if you RTA , the previous attempt epic failed .
The guy was about to climb into the balloon when the balloon broke free and left for the sky without him .
That 's almost as funny as missing the ground .
Maybe Baumgartner will accidentally open a hyperspace window and end up on the other side of the earth.. . ---- One day , I accidentally ate a screwdriver instead of a corndog .
I thought to myself , This would make a good signature .</tokentext>
<sentencetext>Actually, if you RTA, the previous attempt epic failed.
The guy was about to climb into the balloon when the balloon broke free and left for the sky without him.
That's almost as funny as missing the ground.
Maybe Baumgartner will accidentally open a hyperspace window and end up on the other side of the earth...


----

One day, I accidentally ate a screwdriver instead of a corndog.
I thought to myself, This would make a good signature.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871912</id>
	<title>Re:Supplemental question</title>
	<author>Hamoohead</author>
	<datestamp>1264279920000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Yes, but due to the doppler effect, from your perspective it will be subsonic.  Those ahead of your trajectory would most probably hear a "mouse fart".</htmltext>
<tokenext>Yes , but due to the doppler effect , from your perspective it will be subsonic .
Those ahead of your trajectory would most probably hear a " mouse fart " .</tokentext>
<sentencetext>Yes, but due to the doppler effect, from your perspective it will be subsonic.
Those ahead of your trajectory would most probably hear a "mouse fart".</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870572</id>
	<title>Re:Star Trek</title>
	<author>colinrichardday</author>
	<datestamp>1264270440000</datestamp>
	<modclass>Funny</modclass>
	<modscore>3</modscore>
	<htmltext><p>&lt;response voice="Picard"&gt;But I see <b>11</b> Star Trek films!&lt;/response&gt;</p></htmltext>
<tokenext>But I see 11 Star Trek films !</tokentext>
<sentencetext>But I see 11 Star Trek films!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870176</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873546</id>
	<title>The real question is ...</title>
	<author>Anonymous</author>
	<datestamp>1264248900000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>... how high ?</p></htmltext>
<tokenext>... how high ?</tokentext>
<sentencetext>... how high ?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870170</id>
	<title>Re:no sound = no sound barrier</title>
	<author>Anonymous</author>
	<datestamp>1264267380000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>He'll still be going that fast for a while as he enters the layers of atmosphere that are dense enough to support the conveyance of soundwaves.  At which point, he'll break the sound barrier</p></htmltext>
<tokenext>He 'll still be going that fast for a while as he enters the layers of atmosphere that are dense enough to support the conveyance of soundwaves .
At which point , he 'll break the sound barrier</tokentext>
<sentencetext>He'll still be going that fast for a while as he enters the layers of atmosphere that are dense enough to support the conveyance of soundwaves.
At which point, he'll break the sound barrier</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870070</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870852</id>
	<title>Re:Star Trek</title>
	<author>stockard</author>
	<datestamp>1264272900000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>My first thought was the Mobile Infantry from Starship Troopers (the book not the movie), even though he's jumping from a balloon, and not from orbit.</htmltext>
<tokenext>My first thought was the Mobile Infantry from Starship Troopers ( the book not the movie ) , even though he 's jumping from a balloon , and not from orbit .</tokentext>
<sentencetext>My first thought was the Mobile Infantry from Starship Troopers (the book not the movie), even though he's jumping from a balloon, and not from orbit.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</id>
	<title>Star Trek</title>
	<author>Anonymous</author>
	<datestamp>1264266660000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>3</modscore>
	<htmltext>Am I the only one that though of the space diving scene from Star Trek 11?</htmltext>
<tokenext>Am I the only one that though of the space diving scene from Star Trek 11 ?</tokentext>
<sentencetext>Am I the only one that though of the space diving scene from Star Trek 11?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870282</id>
	<title>Re:Failed how?</title>
	<author>sick\_soul</author>
	<datestamp>1264268340000</datestamp>
	<modclass>Funny</modclass>
	<modscore>3</modscore>
	<htmltext><p>Missing the ground is fundamental in learning how to fly</p><p><a href="http://www.urbandictionary.com/define.php?term=flying" title="urbandictionary.com" rel="nofollow">http://www.urbandictionary.com/define.php?term=flying</a> [urbandictionary.com]</p><p>See 3.</p></htmltext>
<tokenext>Missing the ground is fundamental in learning how to flyhttp : //www.urbandictionary.com/define.php ? term = flying [ urbandictionary.com ] See 3 .</tokentext>
<sentencetext>Missing the ground is fundamental in learning how to flyhttp://www.urbandictionary.com/define.php?term=flying [urbandictionary.com]See 3.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870264</id>
	<title>Re:Failed how?</title>
	<author>Anonymous</author>
	<datestamp>1264268160000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Youve never read the Hitchhikers guide - the art of flying is to fall towards the ground, but miss.</p></htmltext>
<tokenext>Youve never read the Hitchhikers guide - the art of flying is to fall towards the ground , but miss .</tokentext>
<sentencetext>Youve never read the Hitchhikers guide - the art of flying is to fall towards the ground, but miss.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873562</id>
	<title>inclined plane?</title>
	<author>Anonymous</author>
	<datestamp>1264249020000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>composed of laminar flow of air molecules around surface of the balloon</p></htmltext>
<tokenext>composed of laminar flow of air molecules around surface of the balloon</tokentext>
<sentencetext>composed of laminar flow of air molecules around surface of the balloon</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874434</id>
	<title>Terminal Velocity</title>
	<author>Anonymous</author>
	<datestamp>1264256700000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Ummm...whatever happened to terminal velocity? Can the human body even break the sound barrier? I was taught in High School physics that the human body had a terminal velocity of about 120mp/h.</p><p>Please correct me if I'm wrong, I'm just rather curious.</p></htmltext>
<tokenext>Ummm...whatever happened to terminal velocity ?
Can the human body even break the sound barrier ?
I was taught in High School physics that the human body had a terminal velocity of about 120mp/h.Please correct me if I 'm wrong , I 'm just rather curious .</tokentext>
<sentencetext>Ummm...whatever happened to terminal velocity?
Can the human body even break the sound barrier?
I was taught in High School physics that the human body had a terminal velocity of about 120mp/h.Please correct me if I'm wrong, I'm just rather curious.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870478</id>
	<title>Re:Just use a dummy first.</title>
	<author>maxwell demon</author>
	<datestamp>1264269780000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>But "dummy died when sky-diving at supersonic speed" is a worse headline than "human died when sky-diving at supersonic speed"<nobr> <wbr></nobr>...<br>Won't anyone think of the newspapers?</p></htmltext>
<tokenext>But " dummy died when sky-diving at supersonic speed " is a worse headline than " human died when sky-diving at supersonic speed " ...Wo n't anyone think of the newspapers ?</tokentext>
<sentencetext>But "dummy died when sky-diving at supersonic speed" is a worse headline than "human died when sky-diving at supersonic speed" ...Won't anyone think of the newspapers?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870298</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874938</id>
	<title>Re:I'll bet</title>
	<author>jbolden</author>
	<datestamp>1264261500000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext><p>There is almost no air.  According to people who have done high altitude jumping you are essentially unaware you are actually falling.</p></htmltext>
<tokenext>There is almost no air .
According to people who have done high altitude jumping you are essentially unaware you are actually falling .</tokentext>
<sentencetext>There is almost no air.
According to people who have done high altitude jumping you are essentially unaware you are actually falling.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871566</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871388</id>
	<title>Re:Anyone else think..</title>
	<author>ArundelCastle</author>
	<datestamp>1264276740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>The summary could just as easily be titled:<br>Sound Barrier To Break Skydiver During Free-Fall.</p></htmltext>
<tokenext>The summary could just as easily be titled : Sound Barrier To Break Skydiver During Free-Fall .</tokentext>
<sentencetext>The summary could just as easily be titled:Sound Barrier To Break Skydiver During Free-Fall.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870078</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871350</id>
	<title>Re:Physics novice, here:</title>
	<author>crazyvas</author>
	<datestamp>1264276560000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Terminal velocity is not a fixed value. It is directly propotional to (the square root of):

<ul>
<li>m = mass of the falling object,</li>
<li>g = acceleration due to gravity,</li>
</ul><p>

Both these are constants in our case. Terminal velocity is inversely
propotional to (the square root of):

</p><ul>
<li>C = drag coefficient,</li>
<li>I = density of the fluid through which the object is falling, and</li>
<li>A = projected area of the object.</li>
</ul><p>

These are subject to change. In particular, "I", which is the density of
the fluid, means that since air (the fluid here) is gets less dense with
increasing altitudes, terminal velocity is higher at these high altitudes.
<br>
<br>
<a href="http://en.wikipedia.org/wiki/Terminal\_velocity" title="wikipedia.org" rel="nofollow">http://en.wikipedia.org/wiki/Terminal\_velocity</a> [wikipedia.org]</p></htmltext>
<tokenext>Terminal velocity is not a fixed value .
It is directly propotional to ( the square root of ) : m = mass of the falling object , g = acceleration due to gravity , Both these are constants in our case .
Terminal velocity is inversely propotional to ( the square root of ) : C = drag coefficient , I = density of the fluid through which the object is falling , and A = projected area of the object .
These are subject to change .
In particular , " I " , which is the density of the fluid , means that since air ( the fluid here ) is gets less dense with increasing altitudes , terminal velocity is higher at these high altitudes .
http : //en.wikipedia.org/wiki/Terminal \ _velocity [ wikipedia.org ]</tokentext>
<sentencetext>Terminal velocity is not a fixed value.
It is directly propotional to (the square root of):


m = mass of the falling object,
g = acceleration due to gravity,


Both these are constants in our case.
Terminal velocity is inversely
propotional to (the square root of):


C = drag coefficient,
I = density of the fluid through which the object is falling, and
A = projected area of the object.
These are subject to change.
In particular, "I", which is the density of
the fluid, means that since air (the fluid here) is gets less dense with
increasing altitudes, terminal velocity is higher at these high altitudes.
http://en.wikipedia.org/wiki/Terminal\_velocity [wikipedia.org]</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870258</id>
	<title>Re:Star Trek</title>
	<author>maxwell demon</author>
	<datestamp>1264268100000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I actually thought of the end of Dark Star.</p></htmltext>
<tokenext>I actually thought of the end of Dark Star .</tokentext>
<sentencetext>I actually thought of the end of Dark Star.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30877280</id>
	<title>Boards of Canada - Dayvan Cowboy</title>
	<author>742Evergreen</author>
	<datestamp>1264335180000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Some footage from the original Kittinger jump are incorporated in this awesome music video by Boards of Canada:<br><a href="http://www.youtube.com/watch?v=3xN3t1fSbnc" title="youtube.com" rel="nofollow">http://www.youtube.com/watch?v=3xN3t1fSbnc</a> [youtube.com]</p></htmltext>
<tokenext>Some footage from the original Kittinger jump are incorporated in this awesome music video by Boards of Canada : http : //www.youtube.com/watch ? v = 3xN3t1fSbnc [ youtube.com ]</tokentext>
<sentencetext>Some footage from the original Kittinger jump are incorporated in this awesome music video by Boards of Canada:http://www.youtube.com/watch?v=3xN3t1fSbnc [youtube.com]</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871594</id>
	<title>Re:Anyone else think..</title>
	<author>K. S. Kyosuke</author>
	<datestamp>1264278060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>I was wondering that as well, considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses.</p></div><p>Can infer from that, therefore, that the first skydivers to exceed the speed of sound will break apart as well, but one day, one of them won't and will be celebrated more than Chuck Yeager?</p></div>
	</htmltext>
<tokenext>I was wondering that as well , considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses.Can infer from that , therefore , that the first skydivers to exceed the speed of sound will break apart as well , but one day , one of them wo n't and will be celebrated more than Chuck Yeager ?</tokentext>
<sentencetext>I was wondering that as well, considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses.Can infer from that, therefore, that the first skydivers to exceed the speed of sound will break apart as well, but one day, one of them won't and will be celebrated more than Chuck Yeager?
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870864</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874798</id>
	<title>around my house we call the sound a human body</title>
	<author>WormholeFiend</author>
	<datestamp>1264260540000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>that breaks the sound barrier, the brown note</p></htmltext>
<tokenext>that breaks the sound barrier , the brown note</tokentext>
<sentencetext>that breaks the sound barrier, the brown note</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871780</id>
	<title>Re:Braking deceleration</title>
	<author>Anonymous</author>
	<datestamp>1264279140000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>I believe that as with the original jump, the chute is opened before the air is really thick enough to slow him down, just enough to fill the chute.  As the air's density increases, he slows down rather gradually.</p></htmltext>
<tokenext>I believe that as with the original jump , the chute is opened before the air is really thick enough to slow him down , just enough to fill the chute .
As the air 's density increases , he slows down rather gradually .</tokentext>
<sentencetext>I believe that as with the original jump, the chute is opened before the air is really thick enough to slow him down, just enough to fill the chute.
As the air's density increases, he slows down rather gradually.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870620</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870468</id>
	<title>Re:no sound = no sound barrier</title>
	<author>Deadstick</author>
	<datestamp>1264269720000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>If you go supersonic, there will be sound. Trust me on this.</p><p>rj</p></htmltext>
<tokenext>If you go supersonic , there will be sound .
Trust me on this.rj</tokentext>
<sentencetext>If you go supersonic, there will be sound.
Trust me on this.rj</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870070</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870644</id>
	<title>Re:Failed how?</title>
	<author>tomhath</author>
	<datestamp>1264271040000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>1</modscore>
	<htmltext><p>Obligatory <a href="http://www.youtube.com/watch?v=ddcQioAQpX0" title="youtube.com">Franz Reichelt attempting to fly off the Eiffel Tower</a> [youtube.com] reference.</p><p>Graphic Video Warning: He does not miss the ground.</p></htmltext>
<tokenext>Obligatory Franz Reichelt attempting to fly off the Eiffel Tower [ youtube.com ] reference.Graphic Video Warning : He does not miss the ground .</tokentext>
<sentencetext>Obligatory Franz Reichelt attempting to fly off the Eiffel Tower [youtube.com] reference.Graphic Video Warning: He does not miss the ground.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870370</id>
	<title>Re:A simple machine</title>
	<author>raddan</author>
	<datestamp>1264269060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I think TFA meant without a machine to propel you on the way down.  At that point, it's just you and gravity.</htmltext>
<tokenext>I think TFA meant without a machine to propel you on the way down .
At that point , it 's just you and gravity .</tokentext>
<sentencetext>I think TFA meant without a machine to propel you on the way down.
At that point, it's just you and gravity.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</id>
	<title>I'll bet</title>
	<author>Vinegar Joe</author>
	<datestamp>1264266300000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>4</modscore>
	<htmltext><p>It's really going to hurt.</p></htmltext>
<tokenext>It 's really going to hurt .</tokentext>
<sentencetext>It's really going to hurt.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871600</id>
	<title>Re:A simple machine</title>
	<author>Vellmont</author>
	<datestamp>1264278120000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i><br>Not true at all. He wants to exceed the speed of sound by falling quickly, but the dang balloon keeps lifting him up! If anything, it's actively working against him!<br></i><br>Clever, but misses the point.</p><p>Rather than argue what "a machine" is, I'd rather step back and wonder what the original distinction was supposed to convey.  He's certainly using a tool, since the balloon, gondola and parachute aren't part of his body.  He's not using his muscles to propel himself, so this isn't a physical feat of strength (beyond the obvious endurance of cold/stress of the environment).  It's true the tool he's using isn't directly propelling him, but the balloon is certainly later enabling him to gain such high velocity.  Dismissing the role of the technology as counter-productive is just self-deception.</p><p>If you want to categorize this, it's mostly a feat of daring and technology.  To me that puts it closer to the category of "land speed record" than it does of "longest long jump".</p></htmltext>
<tokenext>Not true at all .
He wants to exceed the speed of sound by falling quickly , but the dang balloon keeps lifting him up !
If anything , it 's actively working against him ! Clever , but misses the point.Rather than argue what " a machine " is , I 'd rather step back and wonder what the original distinction was supposed to convey .
He 's certainly using a tool , since the balloon , gondola and parachute are n't part of his body .
He 's not using his muscles to propel himself , so this is n't a physical feat of strength ( beyond the obvious endurance of cold/stress of the environment ) .
It 's true the tool he 's using is n't directly propelling him , but the balloon is certainly later enabling him to gain such high velocity .
Dismissing the role of the technology as counter-productive is just self-deception.If you want to categorize this , it 's mostly a feat of daring and technology .
To me that puts it closer to the category of " land speed record " than it does of " longest long jump " .</tokentext>
<sentencetext>Not true at all.
He wants to exceed the speed of sound by falling quickly, but the dang balloon keeps lifting him up!
If anything, it's actively working against him!Clever, but misses the point.Rather than argue what "a machine" is, I'd rather step back and wonder what the original distinction was supposed to convey.
He's certainly using a tool, since the balloon, gondola and parachute aren't part of his body.
He's not using his muscles to propel himself, so this isn't a physical feat of strength (beyond the obvious endurance of cold/stress of the environment).
It's true the tool he's using isn't directly propelling him, but the balloon is certainly later enabling him to gain such high velocity.
Dismissing the role of the technology as counter-productive is just self-deception.If you want to categorize this, it's mostly a feat of daring and technology.
To me that puts it closer to the category of "land speed record" than it does of "longest long jump".</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872792</id>
	<title>Re:A simple machine</title>
	<author>the brown guy</author>
	<datestamp>1264243380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>"A balloon is just hot air in a sack. Nothing machine-like about that,"</p><p>So obviously your head isn't a machine either</p></htmltext>
<tokenext>" A balloon is just hot air in a sack .
Nothing machine-like about that , " So obviously your head is n't a machine either</tokentext>
<sentencetext>"A balloon is just hot air in a sack.
Nothing machine-like about that,"So obviously your head isn't a machine either</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872068</id>
	<title>Re:Physics novice, here:</title>
	<author>kannibal\_klown</author>
	<datestamp>1264237920000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Isn't "terminal velocity" lower than the speed of sound?</p></div><p>Your terminal velocity depends on many factors...</p><p>- Angle of attack<br>Free fall TV is slower than a controlled head-first dive, as in a controlled nose dive you're more aerodynamic.  Go flat like a pancake and you'll fall slower than someone tumbling or someone taking a nose dive.  Which is why I hate it when a HS student with only basic physics complains when a movie has 2 people skydiving and one guy being able to catch up to another after a while.</p><p>So if he has some sort of suit that will make him more aerodynamic that your average skydiver he can really hit some major speeds.</p><p>- Your current altitude<br>The higher the altitude (especially over 10,000 ft), the thinner the air.  The thinner the air, the less air resistance.  The less air resistance, the higher the TV.</p><p>It should be mentioned that TV isn't instantaneous in free fall, if he surpasses TV due to falling from a higher altitude he'll gradually slow down to TV.  So I imagine as he passes the 10,000 ft mark he'll being going faster than that altitude's TV for a short while.</p><p>Now how this all equates to breaking the sound barrier, I have no idea.  As other posters said, at the extreme altitudes he's starting at his TV will be quite significant.  However the speed of sound is also a lot less at those heights.</p></div>
	</htmltext>
<tokenext>Is n't " terminal velocity " lower than the speed of sound ? Your terminal velocity depends on many factors...- Angle of attackFree fall TV is slower than a controlled head-first dive , as in a controlled nose dive you 're more aerodynamic .
Go flat like a pancake and you 'll fall slower than someone tumbling or someone taking a nose dive .
Which is why I hate it when a HS student with only basic physics complains when a movie has 2 people skydiving and one guy being able to catch up to another after a while.So if he has some sort of suit that will make him more aerodynamic that your average skydiver he can really hit some major speeds.- Your current altitudeThe higher the altitude ( especially over 10,000 ft ) , the thinner the air .
The thinner the air , the less air resistance .
The less air resistance , the higher the TV.It should be mentioned that TV is n't instantaneous in free fall , if he surpasses TV due to falling from a higher altitude he 'll gradually slow down to TV .
So I imagine as he passes the 10,000 ft mark he 'll being going faster than that altitude 's TV for a short while.Now how this all equates to breaking the sound barrier , I have no idea .
As other posters said , at the extreme altitudes he 's starting at his TV will be quite significant .
However the speed of sound is also a lot less at those heights .</tokentext>
<sentencetext>Isn't "terminal velocity" lower than the speed of sound?Your terminal velocity depends on many factors...- Angle of attackFree fall TV is slower than a controlled head-first dive, as in a controlled nose dive you're more aerodynamic.
Go flat like a pancake and you'll fall slower than someone tumbling or someone taking a nose dive.
Which is why I hate it when a HS student with only basic physics complains when a movie has 2 people skydiving and one guy being able to catch up to another after a while.So if he has some sort of suit that will make him more aerodynamic that your average skydiver he can really hit some major speeds.- Your current altitudeThe higher the altitude (especially over 10,000 ft), the thinner the air.
The thinner the air, the less air resistance.
The less air resistance, the higher the TV.It should be mentioned that TV isn't instantaneous in free fall, if he surpasses TV due to falling from a higher altitude he'll gradually slow down to TV.
So I imagine as he passes the 10,000 ft mark he'll being going faster than that altitude's TV for a short while.Now how this all equates to breaking the sound barrier, I have no idea.
As other posters said, at the extreme altitudes he's starting at his TV will be quite significant.
However the speed of sound is also a lot less at those heights.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875034</id>
	<title>Can't wait to see the restricted airspace</title>
	<author>yabos</author>
	<datestamp>1264262400000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>FAA restricted airspace, ground level to 120,000' due to crazy guy jumping from balloon.  Radius 100 nautical miles.</htmltext>
<tokenext>FAA restricted airspace , ground level to 120,000 ' due to crazy guy jumping from balloon .
Radius 100 nautical miles .</tokentext>
<sentencetext>FAA restricted airspace, ground level to 120,000' due to crazy guy jumping from balloon.
Radius 100 nautical miles.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870896</id>
	<title>Re:Physics novice, here:</title>
	<author>Angst Badger</author>
	<datestamp>1264273260000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext><p><div class="quote"><p>Isn't "terminal velocity" lower than the speed of sound?</p></div><p>Terminal velocity depends on aerodynamic drag. At altitudes that high, there atmosphere is quite thin, so there's not much drag and a man-sized object can fall well in excess of the speed of sound. In fact, the air is so thin at 100,000 feet that even deploying his parachute wouldn't do much to slow him down. When he reaches the lower, denser parts of the atmosphere, he'll slow down considerably.</p><p>If not, terminal velocity in the lithosphere is approximately 0 mph.</p></div>
	</htmltext>
<tokenext>Is n't " terminal velocity " lower than the speed of sound ? Terminal velocity depends on aerodynamic drag .
At altitudes that high , there atmosphere is quite thin , so there 's not much drag and a man-sized object can fall well in excess of the speed of sound .
In fact , the air is so thin at 100,000 feet that even deploying his parachute would n't do much to slow him down .
When he reaches the lower , denser parts of the atmosphere , he 'll slow down considerably.If not , terminal velocity in the lithosphere is approximately 0 mph .</tokentext>
<sentencetext>Isn't "terminal velocity" lower than the speed of sound?Terminal velocity depends on aerodynamic drag.
At altitudes that high, there atmosphere is quite thin, so there's not much drag and a man-sized object can fall well in excess of the speed of sound.
In fact, the air is so thin at 100,000 feet that even deploying his parachute wouldn't do much to slow him down.
When he reaches the lower, denser parts of the atmosphere, he'll slow down considerably.If not, terminal velocity in the lithosphere is approximately 0 mph.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875898</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264270200000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Of course, that's where thunder comes from!</p></htmltext>
<tokenext>Of course , that 's where thunder comes from !</tokentext>
<sentencetext>Of course, that's where thunder comes from!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870864</id>
	<title>Re:Anyone else think..</title>
	<author>Attila Dimedici</author>
	<datestamp>1264272960000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I was wondering that as well, considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses.</htmltext>
<tokenext>I was wondering that as well , considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses .</tokentext>
<sentencetext>I was wondering that as well, considering that the first airplanes that exceeded the speed of sound broke apart due to the stresses.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870078</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870070</id>
	<title>no sound = no sound barrier</title>
	<author>knappe duivel</author>
	<datestamp>1264266540000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext>Funny... breaking the sound barrier when there is no sound</htmltext>
<tokenext>Funny... breaking the sound barrier when there is no sound</tokentext>
<sentencetext>Funny... breaking the sound barrier when there is no sound</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870536</id>
	<title>Re:A simple machine</title>
	<author>Sir\_Lewk</author>
	<datestamp>1264270140000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext><p>You must be a big hit at the parties.</p></htmltext>
<tokenext>You must be a big hit at the parties .</tokentext>
<sentencetext>You must be a big hit at the parties.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870512</id>
	<title>Drift?</title>
	<author>RevWaldo</author>
	<datestamp>1264270020000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>3</modscore>
	<htmltext>During the fall, how far could he drift from the balloon's overhead position? A few miles? Tens of miles?</htmltext>
<tokenext>During the fall , how far could he drift from the balloon 's overhead position ?
A few miles ?
Tens of miles ?</tokentext>
<sentencetext>During the fall, how far could he drift from the balloon's overhead position?
A few miles?
Tens of miles?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873614</id>
	<title>Re:Anyone else think..</title>
	<author>AbRASiON</author>
	<datestamp>1264249380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Actually, Kittinger damaged his suit on the way up and had a leak, his hand was freezing and he could have lost it and he still went fine.<br>That was many years ago, advances in technology and planning I would think make this stunt at least easier than it was.<br>My god I hope it's filmed like Kittingers was (it's on google videos)</p></htmltext>
<tokenext>Actually , Kittinger damaged his suit on the way up and had a leak , his hand was freezing and he could have lost it and he still went fine.That was many years ago , advances in technology and planning I would think make this stunt at least easier than it was.My god I hope it 's filmed like Kittingers was ( it 's on google videos )</tokentext>
<sentencetext>Actually, Kittinger damaged his suit on the way up and had a leak, his hand was freezing and he could have lost it and he still went fine.That was many years ago, advances in technology and planning I would think make this stunt at least easier than it was.My god I hope it's filmed like Kittingers was (it's on google videos)</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870078</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871226</id>
	<title>Re:A simple machine</title>
	<author>Anonymous</author>
	<datestamp>1264275780000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>So is the Space Shuttle accelerating astronauts on reentry, or are they just gliding?</p></htmltext>
<tokenext>So is the Space Shuttle accelerating astronauts on reentry , or are they just gliding ?</tokentext>
<sentencetext>So is the Space Shuttle accelerating astronauts on reentry, or are they just gliding?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870536</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870608</id>
	<title>Re:A simple machine</title>
	<author>Spacezilla</author>
	<datestamp>1264270740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I thought the definition of a machine was something about moving parts?</p></htmltext>
<tokenext>I thought the definition of a machine was something about moving parts ?</tokentext>
<sentencetext>I thought the definition of a machine was something about moving parts?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874068</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264253280000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>As if it were only a fart.</p></htmltext>
<tokenext>As if it were only a fart .</tokentext>
<sentencetext>As if it were only a fart.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874582</id>
	<title>Re:Physics novice, here:</title>
	<author>fenix849</author>
	<datestamp>1264258320000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>There's a picture of his helmet and a red bull promotional video at popsci:
<a href="http://www.popsci.com.au/technology/article/2010-01/120000-foot-jump-daredevil-space-diver-become-first-human-break-sound-barrier-free-fall" title="popsci.com.au" rel="nofollow">http://www.popsci.com.au/technology/article/2010-01/120000-foot-jump-daredevil-space-diver-become-first-human-break-sound-barrier-free-fall</a> [popsci.com.au]</htmltext>
<tokenext>There 's a picture of his helmet and a red bull promotional video at popsci : http : //www.popsci.com.au/technology/article/2010-01/120000-foot-jump-daredevil-space-diver-become-first-human-break-sound-barrier-free-fall [ popsci.com.au ]</tokentext>
<sentencetext>There's a picture of his helmet and a red bull promotional video at popsci:
http://www.popsci.com.au/technology/article/2010-01/120000-foot-jump-daredevil-space-diver-become-first-human-break-sound-barrier-free-fall [popsci.com.au]</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870892</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870802</id>
	<title>Re:The real question is ...</title>
	<author>Anonymous</author>
	<datestamp>1264272360000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>crash and burn OR burn and crash?</p></htmltext>
<tokenext>crash and burn OR burn and crash ?</tokentext>
<sentencetext>crash and burn OR burn and crash?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870620</id>
	<title>Braking deceleration</title>
	<author>Arancaytar</author>
	<datestamp>1264270860000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext><p>Aside from the air friction, it's going to jolt like hell when his chute opens and he starts to decelerate.</p></htmltext>
<tokenext>Aside from the air friction , it 's going to jolt like hell when his chute opens and he starts to decelerate .</tokentext>
<sentencetext>Aside from the air friction, it's going to jolt like hell when his chute opens and he starts to decelerate.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870666</id>
	<title>Re:A simple machine</title>
	<author>ScrewMaster</author>
	<datestamp>1264271160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p><div class="quote"><p>he will exceed the speed of sound &mdash; the first person to do so without the aid of a machine.</p></div><p>He's using a machine.  It's a balloon that sends him up 120,000 ft.</p></div><p>Gah. The basic assumption here is that he's not using powered flight to get him up there<nobr> <wbr></nobr>... the fact that a balloon can be considered a mechanical device is irrelevant. And even if he were using a rocket or other such <i>machine</i> to get him there, it would hardly detract from the feat itself, that of falling almost 28 <i>miles</i>. Why the summary even bothered to state that he's not using the aid of a machine is stupid anyway<nobr> <wbr></nobr>... of course he's using a machine of some kind to get that far off the planet. What else would he use<nobr> <wbr></nobr>... teleportation?
<br> <br>
Of course, having said that, I still think he's completely nuts.</p></div>
	</htmltext>
<tokenext>he will exceed the speed of sound    the first person to do so without the aid of a machine.He 's using a machine .
It 's a balloon that sends him up 120,000 ft.Gah .
The basic assumption here is that he 's not using powered flight to get him up there ... the fact that a balloon can be considered a mechanical device is irrelevant .
And even if he were using a rocket or other such machine to get him there , it would hardly detract from the feat itself , that of falling almost 28 miles .
Why the summary even bothered to state that he 's not using the aid of a machine is stupid anyway ... of course he 's using a machine of some kind to get that far off the planet .
What else would he use ... teleportation ? Of course , having said that , I still think he 's completely nuts .</tokentext>
<sentencetext>he will exceed the speed of sound — the first person to do so without the aid of a machine.He's using a machine.
It's a balloon that sends him up 120,000 ft.Gah.
The basic assumption here is that he's not using powered flight to get him up there ... the fact that a balloon can be considered a mechanical device is irrelevant.
And even if he were using a rocket or other such machine to get him there, it would hardly detract from the feat itself, that of falling almost 28 miles.
Why the summary even bothered to state that he's not using the aid of a machine is stupid anyway ... of course he's using a machine of some kind to get that far off the planet.
What else would he use ... teleportation?
 
Of course, having said that, I still think he's completely nuts.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871446</id>
	<title>Re:Physics novice, here:</title>
	<author>Rich0</author>
	<datestamp>1264277160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Others have pointed out that terminal velocity depends on air density.  I'd like to point out a very good illustration of this.</p><p>Some of the hottest stuff in the universe is the hydrogen gas (well, ions) that fills intergalactic space in the middle of large galaxy clusters.  It isn't just white-hot, it is x-ray hot.</p><p>How does it get that way?  Simple: terminal velocity.</p><p>The terminal velocity of a hydrogen atom in intergalactic space (density measured in atoms per cubic mile) is, well, astronomical.  So, an atom that starts off floating in some void and falls towards a galaxy cluster.  It probably takes 10s to 100s to maybe even 1000 million years to get there.  Along the way it might bump into a few atoms on the whole trip.  The first one it hits releases the kinds of energy associated with particle accelerators and the free protons and electrons just keep on falling.  I'd be surprised if it even reaches terminal velocity as that would imply some kind of equilibrium where the kinetics have rate constants in the millions of years most likely.</p><p>Eventually it hits the middle and starts decelerating until it is well into the next void (which takes as long as the original fall), then begins falling back repeating the process.</p><p>Fascinating stuff...</p><p>Disclaimer - I'm not an astrophysicist - and if any real ones have more to add I'm certainly all ears...<nobr> <wbr></nobr>:)</p></htmltext>
<tokenext>Others have pointed out that terminal velocity depends on air density .
I 'd like to point out a very good illustration of this.Some of the hottest stuff in the universe is the hydrogen gas ( well , ions ) that fills intergalactic space in the middle of large galaxy clusters .
It is n't just white-hot , it is x-ray hot.How does it get that way ?
Simple : terminal velocity.The terminal velocity of a hydrogen atom in intergalactic space ( density measured in atoms per cubic mile ) is , well , astronomical .
So , an atom that starts off floating in some void and falls towards a galaxy cluster .
It probably takes 10s to 100s to maybe even 1000 million years to get there .
Along the way it might bump into a few atoms on the whole trip .
The first one it hits releases the kinds of energy associated with particle accelerators and the free protons and electrons just keep on falling .
I 'd be surprised if it even reaches terminal velocity as that would imply some kind of equilibrium where the kinetics have rate constants in the millions of years most likely.Eventually it hits the middle and starts decelerating until it is well into the next void ( which takes as long as the original fall ) , then begins falling back repeating the process.Fascinating stuff...Disclaimer - I 'm not an astrophysicist - and if any real ones have more to add I 'm certainly all ears... : )</tokentext>
<sentencetext>Others have pointed out that terminal velocity depends on air density.
I'd like to point out a very good illustration of this.Some of the hottest stuff in the universe is the hydrogen gas (well, ions) that fills intergalactic space in the middle of large galaxy clusters.
It isn't just white-hot, it is x-ray hot.How does it get that way?
Simple: terminal velocity.The terminal velocity of a hydrogen atom in intergalactic space (density measured in atoms per cubic mile) is, well, astronomical.
So, an atom that starts off floating in some void and falls towards a galaxy cluster.
It probably takes 10s to 100s to maybe even 1000 million years to get there.
Along the way it might bump into a few atoms on the whole trip.
The first one it hits releases the kinds of energy associated with particle accelerators and the free protons and electrons just keep on falling.
I'd be surprised if it even reaches terminal velocity as that would imply some kind of equilibrium where the kinetics have rate constants in the millions of years most likely.Eventually it hits the middle and starts decelerating until it is well into the next void (which takes as long as the original fall), then begins falling back repeating the process.Fascinating stuff...Disclaimer - I'm not an astrophysicist - and if any real ones have more to add I'm certainly all ears... :)</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875276</id>
	<title>Re:Star Trek</title>
	<author>mosb1000</author>
	<datestamp>1264264500000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext>Those stats are a little out of date, here are the new ones:<br><br>1: 6.2<br>2: 7.8<br>3: 6.5<br>4: 7.3<br>5: 4.9<br>6: 7.2<br>7: 6.5<br>8: 7.6<br>9: 6.4<br>10: 6.4<br>11: 8.2<br><br>The new numbers give a U value of 7.5, which is completely attributable to the latest two movies.  Note that 11 is the highest rated by far (adding 5 to the U value) while 10 is lower than 7 and 3 (so it can take credit for adding 2.5 to the U value).  I'd say that in addition to rebooting the Star Trek franchise, 11 has rebooted the pattern.</htmltext>
<tokenext>Those stats are a little out of date , here are the new ones : 1 : 6.22 : 7.83 : 6.54 : 7.35 : 4.96 : 7.27 : 6.58 : 7.69 : 6.410 : 6.411 : 8.2The new numbers give a U value of 7.5 , which is completely attributable to the latest two movies .
Note that 11 is the highest rated by far ( adding 5 to the U value ) while 10 is lower than 7 and 3 ( so it can take credit for adding 2.5 to the U value ) .
I 'd say that in addition to rebooting the Star Trek franchise , 11 has rebooted the pattern .</tokentext>
<sentencetext>Those stats are a little out of date, here are the new ones:1: 6.22: 7.83: 6.54: 7.35: 4.96: 7.27: 6.58: 7.69: 6.410: 6.411: 8.2The new numbers give a U value of 7.5, which is completely attributable to the latest two movies.
Note that 11 is the highest rated by far (adding 5 to the U value) while 10 is lower than 7 and 3 (so it can take credit for adding 2.5 to the U value).
I'd say that in addition to rebooting the Star Trek franchise, 11 has rebooted the pattern.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870310</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872424</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264240320000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Hey, Mythbusters! Are you reading this?!</p></htmltext>
<tokenext>Hey , Mythbusters !
Are you reading this ?
!</tokentext>
<sentencetext>Hey, Mythbusters!
Are you reading this?
!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871056</id>
	<title>Can I buy insurance?</title>
	<author>NotQuiteReal</author>
	<datestamp>1264274700000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Is 3rd person life insurance legal in Australia?
<br>
<br>
I mean they only ask if one has dangerous hobbies like sky diving, right? They probably don't ask if you are doing super sonic skydiving...</htmltext>
<tokenext>Is 3rd person life insurance legal in Australia ?
I mean they only ask if one has dangerous hobbies like sky diving , right ?
They probably do n't ask if you are doing super sonic skydiving.. .</tokentext>
<sentencetext>Is 3rd person life insurance legal in Australia?
I mean they only ask if one has dangerous hobbies like sky diving, right?
They probably don't ask if you are doing super sonic skydiving...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873872</id>
	<title>Re:Physics novice, here:</title>
	<author>Anonymous</author>
	<datestamp>1264251420000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>I guess even ten meters a second is pretty terminal if you hit the ground...</p></htmltext>
<tokenext>I guess even ten meters a second is pretty terminal if you hit the ground.. .</tokentext>
<sentencetext>I guess even ten meters a second is pretty terminal if you hit the ground...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30876178</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264273320000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>I think want yo meant to say was "If you fart while exceeding the speed of sound, will it make a sound?"</p><p>Everything by definition makes noise, but sound requires someone to hear it as a noise is not sound until it is picking up by an ear.</p><p>So the answer is yes it would make noise, but due to the other, louder sources of noise around, it is unlikely to make any sound.</p></htmltext>
<tokenext>I think want yo meant to say was " If you fart while exceeding the speed of sound , will it make a sound ?
" Everything by definition makes noise , but sound requires someone to hear it as a noise is not sound until it is picking up by an ear.So the answer is yes it would make noise , but due to the other , louder sources of noise around , it is unlikely to make any sound .</tokentext>
<sentencetext>I think want yo meant to say was "If you fart while exceeding the speed of sound, will it make a sound?
"Everything by definition makes noise, but sound requires someone to hear it as a noise is not sound until it is picking up by an ear.So the answer is yes it would make noise, but due to the other, louder sources of noise around, it is unlikely to make any sound.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30897168</id>
	<title>Re:A simple machine</title>
	<author>BobMcD</author>
	<datestamp>1264419540000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>"A balloon is just hot air in a sack. Nothing machine-like about that,"</p><p>So obviously your head isn't a machine either</p></div><p>Sometimes the robots forget they are <i>supposed</i> to be living among us in <i>disguise</i>...</p></div>
	</htmltext>
<tokenext>" A balloon is just hot air in a sack .
Nothing machine-like about that , " So obviously your head is n't a machine eitherSometimes the robots forget they are supposed to be living among us in disguise.. .</tokentext>
<sentencetext>"A balloon is just hot air in a sack.
Nothing machine-like about that,"So obviously your head isn't a machine eitherSometimes the robots forget they are supposed to be living among us in disguise...
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872792</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871582</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264278000000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Noises ahead of the sound cannot be detected ahead of the source at &gt; M=1 by definition. Your airspeed is exceeding the speed of propagation of disturbances through the medium - sound.</p></htmltext>
<tokenext>Noises ahead of the sound can not be detected ahead of the source at &gt; M = 1 by definition .
Your airspeed is exceeding the speed of propagation of disturbances through the medium - sound .</tokentext>
<sentencetext>Noises ahead of the sound cannot be detected ahead of the source at &gt; M=1 by definition.
Your airspeed is exceeding the speed of propagation of disturbances through the medium - sound.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873112</id>
	<title>Re:I'll bet</title>
	<author>Matheus</author>
	<datestamp>1264245840000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>The *real question is:</p><p>Has anyone ever heard of Terminal Velocity?  The record for a human is around half Mach and that takes skill to achieve not just height.</p></htmltext>
<tokenext>The * real question is : Has anyone ever heard of Terminal Velocity ?
The record for a human is around half Mach and that takes skill to achieve not just height .</tokentext>
<sentencetext>The *real question is:Has anyone ever heard of Terminal Velocity?
The record for a human is around half Mach and that takes skill to achieve not just height.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871680</id>
	<title>Re:I'll bet</title>
	<author>Blakey Rat</author>
	<datestamp>1264278600000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>All I can say is I hope to Christ he has Teflon underpants.</p></htmltext>
<tokenext>All I can say is I hope to Christ he has Teflon underpants .</tokentext>
<sentencetext>All I can say is I hope to Christ he has Teflon underpants.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871036</id>
	<title>Re:Anyone else think..</title>
	<author>dimeglio</author>
	<datestamp>1264274580000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I didn't read TFA but I would first send down a few up-aimed video cameras and a dummy. This is going to help him capture the fall and see if the dummy breaks-up when it hits the sound barrier. Kind of a dry run. If all goes well, he could then safely jump. At least, he will know the risks better. A trail of smoke thing sounds like a great idea but likely impractical.</p></htmltext>
<tokenext>I did n't read TFA but I would first send down a few up-aimed video cameras and a dummy .
This is going to help him capture the fall and see if the dummy breaks-up when it hits the sound barrier .
Kind of a dry run .
If all goes well , he could then safely jump .
At least , he will know the risks better .
A trail of smoke thing sounds like a great idea but likely impractical .</tokentext>
<sentencetext>I didn't read TFA but I would first send down a few up-aimed video cameras and a dummy.
This is going to help him capture the fall and see if the dummy breaks-up when it hits the sound barrier.
Kind of a dry run.
If all goes well, he could then safely jump.
At least, he will know the risks better.
A trail of smoke thing sounds like a great idea but likely impractical.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870078</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871748</id>
	<title>Re:Just use a dummy first.</title>
	<author>K. S. Kyosuke</author>
	<datestamp>1264278900000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>"Just use a dummy first."</p></div><p>How exactly is this man himself *not* a dummy?</p></div>
	</htmltext>
<tokenext>" Just use a dummy first .
" How exactly is this man himself * not * a dummy ?</tokentext>
<sentencetext>"Just use a dummy first.
"How exactly is this man himself *not* a dummy?
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870298</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</id>
	<title>Supplemental question</title>
	<author>bobdotorg</author>
	<datestamp>1264270320000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext><p>If you fart while exceeding the speed of sound, will it make a noise?</p></htmltext>
<tokenext>If you fart while exceeding the speed of sound , will it make a noise ?</tokentext>
<sentencetext>If you fart while exceeding the speed of sound, will it make a noise?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870124</id>
	<title>suicide mission</title>
	<author>Anonymous</author>
	<datestamp>1264266960000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>A suicide mission with great importance for science. Finally the long lasting question of what happens to the human body at +1 mach will be answered.</p></htmltext>
<tokenext>A suicide mission with great importance for science .
Finally the long lasting question of what happens to the human body at + 1 mach will be answered .</tokentext>
<sentencetext>A suicide mission with great importance for science.
Finally the long lasting question of what happens to the human body at +1 mach will be answered.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30887606</id>
	<title>Re:The real question is ...</title>
	<author>xbytor</author>
	<datestamp>1264415460000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>As we used to say on Wall St, even a dead cat bounces...</p></htmltext>
<tokenext>As we used to say on Wall St , even a dead cat bounces.. .</tokentext>
<sentencetext>As we used to say on Wall St, even a dead cat bounces...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870480</id>
	<title>Re:no sound = no sound barrier</title>
	<author>HeLLFiRe1151</author>
	<datestamp>1264269780000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Yes, but will anyone hear it?</htmltext>
<tokenext>Yes , but will anyone hear it ?</tokentext>
<sentencetext>Yes, but will anyone hear it?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870146</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870048</id>
	<title>I can tell you</title>
	<author>Anonymous</author>
	<datestamp>1264266420000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>It will really fuck you up.</p><p>-- Will Farrell</p></htmltext>
<tokenext>It will really fuck you up.-- Will Farrell</tokentext>
<sentencetext>It will really fuck you up.-- Will Farrell</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30876692</id>
	<title>Re:Sound barrier</title>
	<author>Rhesusmonkey</author>
	<datestamp>1264324140000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>not as much as if he breaks that ground barrier
*padumpsshhh*</htmltext>
<tokenext>not as much as if he breaks that ground barrier * padumpsshhh *</tokentext>
<sentencetext>not as much as if he breaks that ground barrier
*padumpsshhh*</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870362</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873712</id>
	<title>What does fail mean?</title>
	<author>mathfeel</author>
	<datestamp>1264250160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I am curious about the summary<p><div class="quote"><p>and although many have sought to repeat the feat, all have failed.</p></div><p>Isn't this one of those thing that you either succeed or you die?</p></div>
	</htmltext>
<tokenext>I am curious about the summaryand although many have sought to repeat the feat , all have failed.Is n't this one of those thing that you either succeed or you die ?</tokentext>
<sentencetext>I am curious about the summaryand although many have sought to repeat the feat, all have failed.Isn't this one of those thing that you either succeed or you die?
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870698</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264271400000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>If you are in the fart's reference frame, there is no fart, and the whole universe farts around you!</p></htmltext>
<tokenext>If you are in the fart 's reference frame , there is no fart , and the whole universe farts around you !</tokentext>
<sentencetext>If you are in the fart's reference frame, there is no fart, and the whole universe farts around you!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870146</id>
	<title>Re:no sound = no sound barrier</title>
	<author>Anonymous</author>
	<datestamp>1264267140000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>5</modscore>
	<htmltext><p>If there's enough atmosphere to lift a balloon, there's enough atmosphere to transmit sound.</p></htmltext>
<tokenext>If there 's enough atmosphere to lift a balloon , there 's enough atmosphere to transmit sound .</tokentext>
<sentencetext>If there's enough atmosphere to lift a balloon, there's enough atmosphere to transmit sound.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870070</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30883774</id>
	<title>Probably, if his chutes work</title>
	<author>billstewart</author>
	<datestamp>1264337640000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>If they don't work, he'll have slowed down to low-altitude terminal velocity.  But if everything works, he'll be landing at normal parachute-landing speed, so he may bounce a bit when he first touches down.</p></htmltext>
<tokenext>If they do n't work , he 'll have slowed down to low-altitude terminal velocity .
But if everything works , he 'll be landing at normal parachute-landing speed , so he may bounce a bit when he first touches down .</tokentext>
<sentencetext>If they don't work, he'll have slowed down to low-altitude terminal velocity.
But if everything works, he'll be landing at normal parachute-landing speed, so he may bounce a bit when he first touches down.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</id>
	<title>Physics novice, here:</title>
	<author>captainskyhawk</author>
	<datestamp>1264269840000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>5</modscore>
	<htmltext>Isn't "terminal velocity" lower than the speed of sound?</htmltext>
<tokenext>Is n't " terminal velocity " lower than the speed of sound ?</tokentext>
<sentencetext>Isn't "terminal velocity" lower than the speed of sound?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30877620</id>
	<title>Re:Star Trek</title>
	<author>dangitman</author>
	<datestamp>1264341060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>No, you're the only one who thinks about Star Trek 11.</htmltext>
<tokenext>No , you 're the only one who thinks about Star Trek 11 .</tokentext>
<sentencetext>No, you're the only one who thinks about Star Trek 11.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870800</id>
	<title>Re:Star Trek</title>
	<author>Anonymous</author>
	<datestamp>1264272300000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Did anyone else think specifically of the red shirt in that scene?</p></htmltext>
<tokenext>Did anyone else think specifically of the red shirt in that scene ?</tokentext>
<sentencetext>Did anyone else think specifically of the red shirt in that scene?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871608</id>
	<title>Re:A simple machine</title>
	<author>Anonymous</author>
	<datestamp>1264278120000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Hrm, I think it's an inclined plane with a negative slope, because you roll <i>up</i> it.<nobr> <wbr></nobr>;-)</p></htmltext>
<tokenext>Hrm , I think it 's an inclined plane with a negative slope , because you roll up it .
; - )</tokentext>
<sentencetext>Hrm, I think it's an inclined plane with a negative slope, because you roll up it.
;-)</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</id>
	<title>A simple machine</title>
	<author>Anonymous</author>
	<datestamp>1264268220000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext><p><div class="quote"><p>he will exceed the speed of sound &mdash; the first person to do so without the aid of a machine.</p></div><p>He's using a machine.  It's a balloon that sends him up 120,000 ft.</p></div>
	</htmltext>
<tokenext>he will exceed the speed of sound    the first person to do so without the aid of a machine.He 's using a machine .
It 's a balloon that sends him up 120,000 ft .</tokentext>
<sentencetext>he will exceed the speed of sound — the first person to do so without the aid of a machine.He's using a machine.
It's a balloon that sends him up 120,000 ft.
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30884860</id>
	<title>Re:Physics novice, here:</title>
	<author>Anonymous</author>
	<datestamp>1264345260000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>You need to look up the term "terminal velocity", Yes he can reach the speed of sound</p></htmltext>
<tokenext>You need to look up the term " terminal velocity " , Yes he can reach the speed of sound</tokentext>
<sentencetext>You need to look up the term "terminal velocity", Yes he can reach the speed of sound</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870960</id>
	<title>Re:Physics novice, here:</title>
	<author>Anonymous</author>
	<datestamp>1264273860000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Terminal velocity is the speed a thing is going when the force of gravity pulling down is equal to the force of drag pushing up (0 net force = no acceleration, ie constant velocity).  The force due to drag at high altitudes is very low because there's not much air that high, which means there's not much to keep gravity from accelerating the sky diver.  As he descends and the air gets thicker he will decelerate back to subsonic speeds because terminal velocity is lower at lower altitudes (all else being constant).</p><p>A common myth related to terminal velocity is that terminal velocity is a constant rate that all objects fall at.  That's not true because drag factors into terminal velocity and different things are more or less aerodynamic.  A person skydiving spread-eagle falls slower than a person diving streamlined, and a bullet will fall back down at about the same speed it was going when it was fired.</p></htmltext>
<tokenext>Terminal velocity is the speed a thing is going when the force of gravity pulling down is equal to the force of drag pushing up ( 0 net force = no acceleration , ie constant velocity ) .
The force due to drag at high altitudes is very low because there 's not much air that high , which means there 's not much to keep gravity from accelerating the sky diver .
As he descends and the air gets thicker he will decelerate back to subsonic speeds because terminal velocity is lower at lower altitudes ( all else being constant ) .A common myth related to terminal velocity is that terminal velocity is a constant rate that all objects fall at .
That 's not true because drag factors into terminal velocity and different things are more or less aerodynamic .
A person skydiving spread-eagle falls slower than a person diving streamlined , and a bullet will fall back down at about the same speed it was going when it was fired .</tokentext>
<sentencetext>Terminal velocity is the speed a thing is going when the force of gravity pulling down is equal to the force of drag pushing up (0 net force = no acceleration, ie constant velocity).
The force due to drag at high altitudes is very low because there's not much air that high, which means there's not much to keep gravity from accelerating the sky diver.
As he descends and the air gets thicker he will decelerate back to subsonic speeds because terminal velocity is lower at lower altitudes (all else being constant).A common myth related to terminal velocity is that terminal velocity is a constant rate that all objects fall at.
That's not true because drag factors into terminal velocity and different things are more or less aerodynamic.
A person skydiving spread-eagle falls slower than a person diving streamlined, and a bullet will fall back down at about the same speed it was going when it was fired.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870834</id>
	<title>Red Shirt</title>
	<author>Das Auge</author>
	<datestamp>1264272780000</datestamp>
	<modclass>Funny</modclass>
	<modscore>2</modscore>
	<htmltext>I hope to god he's not wearing a red shirt.</htmltext>
<tokenext>I hope to god he 's not wearing a red shirt .</tokentext>
<sentencetext>I hope to god he's not wearing a red shirt.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870310</id>
	<title>Re:Star Trek</title>
	<author>johny42</author>
	<datestamp>1264268580000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>You must be new here. Everyone knows there are only <a href="http://www.littlespikeyland.com/st\_odd\_even.php" title="littlespikeyland.com" rel="nofollow">four</a> [littlespikeyland.com]!</htmltext>
<tokenext>You must be new here .
Everyone knows there are only four [ littlespikeyland.com ] !</tokentext>
<sentencetext>You must be new here.
Everyone knows there are only four [littlespikeyland.com]!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870176</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30886844</id>
	<title>Re:I'll bet</title>
	<author>Anonymous</author>
	<datestamp>1264363140000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>but I'll be watching http://redbullstratos.com very closely in the coming weeks...</p></htmltext>
<tokenext>but I 'll be watching http : //redbullstratos.com very closely in the coming weeks.. .</tokentext>
<sentencetext>but I'll be watching http://redbullstratos.com very closely in the coming weeks...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870090</id>
	<title>Darwin Award Candidate</title>
	<author>sweetser</author>
	<datestamp>1264266660000</datestamp>
	<modclass>Funny</modclass>
	<modscore>2</modscore>
	<htmltext>Just like car racing, I want to watch.</htmltext>
<tokenext>Just like car racing , I want to watch .</tokentext>
<sentencetext>Just like car racing, I want to watch.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873484</id>
	<title>Re:Physics novice, here:</title>
	<author>5plicer</author>
	<datestamp>1264248300000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Some body armor, perhaps a viscous gel embedded with carbon fiber, seems wise!  Maybe a helmet to keep facial features from being torn removed..  Frost burn, too.</p></div><p>He should also wear ear plugs<nobr> <wbr></nobr>;)</p></div>
	</htmltext>
<tokenext>Some body armor , perhaps a viscous gel embedded with carbon fiber , seems wise !
Maybe a helmet to keep facial features from being torn removed.. Frost burn , too.He should also wear ear plugs ; )</tokentext>
<sentencetext>Some body armor, perhaps a viscous gel embedded with carbon fiber, seems wise!
Maybe a helmet to keep facial features from being torn removed..  Frost burn, too.He should also wear ear plugs ;)
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870892</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872842</id>
	<title>Re:The real question is ...</title>
	<author>Anonymous</author>
	<datestamp>1264243680000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>... will he blend?</p></htmltext>
<tokenext>... will he blend ?</tokentext>
<sentencetext>... will he blend?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</id>
	<title>Failed how?</title>
	<author>Anonymous</author>
	<datestamp>1264267320000</datestamp>
	<modclass>Funny</modclass>
	<modscore>5</modscore>
	<htmltext><blockquote><div><p>American Joe Kittinger made history by leaping from a balloon at 102,800 ft, and although many have sought to repeat the feat, all have failed.</p></div></blockquote><p>Failed?!? How can you fail that? Throw yourself self off the balloon and miss the ground?</p><p>/greger</p></div>
	</htmltext>
<tokenext>American Joe Kittinger made history by leaping from a balloon at 102,800 ft , and although many have sought to repeat the feat , all have failed.Failed ? ! ?
How can you fail that ?
Throw yourself self off the balloon and miss the ground ? /greger</tokentext>
<sentencetext>American Joe Kittinger made history by leaping from a balloon at 102,800 ft, and although many have sought to repeat the feat, all have failed.Failed?!?
How can you fail that?
Throw yourself self off the balloon and miss the ground?/greger
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873658</id>
	<title>Re:A simple machine</title>
	<author>noidentity</author>
	<datestamp>1264249800000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>machine - 1. [...] b. A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.</p></div>
</blockquote><p>A hot air balloon converts the downward force of the atmosphere into an upward force on the basket.</p></div>
	</htmltext>
<tokenext>machine - 1 .
[ ... ] b. A simple device , such as a lever , a pulley , or an inclined plane , that alters the magnitude or direction , or both , of an applied force ; a simple machine .
A hot air balloon converts the downward force of the atmosphere into an upward force on the basket .</tokentext>
<sentencetext>machine - 1.
[...] b. A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.
A hot air balloon converts the downward force of the atmosphere into an upward force on the basket.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30895330</id>
	<title>Suit, schmoot.</title>
	<author>Muad'Dave</author>
	<datestamp>1264412400000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I want to see the scene from the movie <a href="http://www.imdb.com/title/tt0082509/" title="imdb.com">"Heavy Metal"</a> [imdb.com] performed in real life. A car (not just any car, a 57-ish 'vette) drops from the shuttle, survives re-entry (with a little help from the windshield wipers to clear the char/ash), lands safely, and drives off!</p></htmltext>
<tokenext>I want to see the scene from the movie " Heavy Metal " [ imdb.com ] performed in real life .
A car ( not just any car , a 57-ish 'vette ) drops from the shuttle , survives re-entry ( with a little help from the windshield wipers to clear the char/ash ) , lands safely , and drives off !</tokentext>
<sentencetext>I want to see the scene from the movie "Heavy Metal" [imdb.com] performed in real life.
A car (not just any car, a 57-ish 'vette) drops from the shuttle, survives re-entry (with a little help from the windshield wipers to clear the char/ash), lands safely, and drives off!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870362</id>
	<title>Sound barrier</title>
	<author>russotto</author>
	<datestamp>1264269000000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext><p>I'm going to guess that he doesn't break the sound barrier.  The term "barrier" isn't entirely fanciful, as power required to go faster increases enormously as you approach it.</p><p>On the other hand, if he DOES break the sound barrier, I'm going to bet it does him some injury.</p></htmltext>
<tokenext>I 'm going to guess that he does n't break the sound barrier .
The term " barrier " is n't entirely fanciful , as power required to go faster increases enormously as you approach it.On the other hand , if he DOES break the sound barrier , I 'm going to bet it does him some injury .</tokentext>
<sentencetext>I'm going to guess that he doesn't break the sound barrier.
The term "barrier" isn't entirely fanciful, as power required to go faster increases enormously as you approach it.On the other hand, if he DOES break the sound barrier, I'm going to bet it does him some injury.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873692</id>
	<title>Re:I'll bet</title>
	<author>amRadioHed</author>
	<datestamp>1264250040000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>No, height is sufficient. Free fall through sufficiently thin air pretty much guarantees you'll reach the sound barrier.</p></htmltext>
<tokenext>No , height is sufficient .
Free fall through sufficiently thin air pretty much guarantees you 'll reach the sound barrier .</tokentext>
<sentencetext>No, height is sufficient.
Free fall through sufficiently thin air pretty much guarantees you'll reach the sound barrier.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873112</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875324</id>
	<title>Re:A simple machine</title>
	<author>mosb1000</author>
	<datestamp>1264264860000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I'm sure it's a helium balloon.</htmltext>
<tokenext>I 'm sure it 's a helium balloon .</tokentext>
<sentencetext>I'm sure it's a helium balloon.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870376</id>
	<title>Anonymous Coward</title>
	<author>Anonymous</author>
	<datestamp>1264269120000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>gravity is not a machine<nobr> <wbr></nobr>... and that is what propels him to the required speed<br>the balloon has zero to do with his fall other than lifting him to the altitude</p><p>it does not make him go fast</p></htmltext>
<tokenext>gravity is not a machine ... and that is what propels him to the required speedthe balloon has zero to do with his fall other than lifting him to the altitudeit does not make him go fast</tokentext>
<sentencetext>gravity is not a machine ... and that is what propels him to the required speedthe balloon has zero to do with his fall other than lifting him to the altitudeit does not make him go fast</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870564</id>
	<title>Nominee</title>
	<author>Anonymous</author>
	<datestamp>1264270380000</datestamp>
	<modclass>Funny</modclass>
	<modscore>1</modscore>
	<htmltext><p>I think this has to be considered as a Darwin Awards nominee...</p></htmltext>
<tokenext>I think this has to be considered as a Darwin Awards nominee.. .</tokentext>
<sentencetext>I think this has to be considered as a Darwin Awards nominee...</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30894992</id>
	<title>Re:I'll bet</title>
	<author>treeves</author>
	<datestamp>1264410840000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I'm not sure how you'd be unaware of the distinct weightless sensation, despite the lack of wind.</htmltext>
<tokenext>I 'm not sure how you 'd be unaware of the distinct weightless sensation , despite the lack of wind .</tokentext>
<sentencetext>I'm not sure how you'd be unaware of the distinct weightless sensation, despite the lack of wind.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30874938</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30873966</id>
	<title>Speed of Sound, Terminal V and Drag</title>
	<author>DynaSoar</author>
	<datestamp>1264252320000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>3</modscore>
	<htmltext><p>Interviewer: "Is that your crash helmet?"<br>Jose' Jimenez: " . . . oh I hope not."</p><p>Using:<br>standard atmosphere <a href="http://www.desktopaero.com/stdatm.html" title="desktopaero.com">http://www.desktopaero.com/stdatm.html</a> [desktopaero.com]<br>Mach/altitude tables <a href="http://www.aerospaceweb.org/question/atmosphere/q0112.shtml" title="aerospaceweb.org">http://www.aerospaceweb.org/question/atmosphere/q0112.shtml</a> [aerospaceweb.org]<br>g acceleration <a href="http://en.wikipedia.org/wiki/Terminal\_velocity" title="wikipedia.org">http://en.wikipedia.org/wiki/Terminal\_velocity</a> [wikipedia.org]<br>and historical stuff on Col Joe.<br>At 35 seconds he'll have fallen from 120kft to 80kft, going 1126 ft/s. That's Mach 1 at sea level. At 80kft it's Mach 1.15, giving some room for drag error. 10 seconds later he'd cross from stratosphere to tropopause where Mach 1 is lowest, but since it's only a matter of ~6 ft/s, this just gives him room to fall farther if need be but not required. At 80kft the dynamic pressure will be around 55 lb/ft^2, so if fully loaded he weighs more than 165 lbs he'll still accelerate some, but not after the 45 second mark. If he's outfitted like Kittenger was, he'll weigh up towards 300 lbs, and would still accelerate for some time.</p><p>At 30 seconds he'll be falling at 965 ft/s, or Mach 0.98, well within the narrow transonic region of highest pressure, "max Q". This is where aircraft prior to the Bell X-1 came apart due to the buffeting of turbulence combined with the growing bow shock pressure wave.</p><p>He can do it theoretically. The altitude is just about perfect for the attempt. I'm more concerned about whether he'll be able to keep from getting the piss kicked out of him at the Mach line. Sure, it'll be slight compared to what General Chuck punched through, but he's a damn sight slighter than the X-1. On the other hand Kittenger hit Mach 0.96 around 60kft and I see no report of this effect so maybe it's not a problem.</p><p>It may still be a problem to punch through though. There's a spike in the speed/drag curve that's greater or lesser depending on the drag characteristics (coefficient of drag of cD). If his outfit will be shaped to approximate a low cD body so much the better. Since he'll require some form of protection I doubt anyone would fault him for choosing a shape to fit his flight profile.</p><p>If he kept up his falling profile he's still slow to terminal velocity for the lower altitude, around 200 MPH, slower still if he's either braking or blacked out and spinning. Lower altitude here is taken to be where he could pop the chute and stay conscious even if he lost his mask, around 20 kft. At that altitude and speed a full open would be quite a jerk, but no more than airborne troops practice, and which I'm sure he's handled previously. If he's designing his chute to be able to be opened higher/faster should he need or want to, he'll include a drogue chute with a delay before the main, to slow him gradually to safe opening speed (especially helpful if spinning).</p></htmltext>
<tokenext>Interviewer : " Is that your crash helmet ?
" Jose ' Jimenez : " .
. .
oh I hope not .
" Using : standard atmosphere http : //www.desktopaero.com/stdatm.html [ desktopaero.com ] Mach/altitude tables http : //www.aerospaceweb.org/question/atmosphere/q0112.shtml [ aerospaceweb.org ] g acceleration http : //en.wikipedia.org/wiki/Terminal \ _velocity [ wikipedia.org ] and historical stuff on Col Joe.At 35 seconds he 'll have fallen from 120kft to 80kft , going 1126 ft/s .
That 's Mach 1 at sea level .
At 80kft it 's Mach 1.15 , giving some room for drag error .
10 seconds later he 'd cross from stratosphere to tropopause where Mach 1 is lowest , but since it 's only a matter of ~ 6 ft/s , this just gives him room to fall farther if need be but not required .
At 80kft the dynamic pressure will be around 55 lb/ft ^ 2 , so if fully loaded he weighs more than 165 lbs he 'll still accelerate some , but not after the 45 second mark .
If he 's outfitted like Kittenger was , he 'll weigh up towards 300 lbs , and would still accelerate for some time.At 30 seconds he 'll be falling at 965 ft/s , or Mach 0.98 , well within the narrow transonic region of highest pressure , " max Q " .
This is where aircraft prior to the Bell X-1 came apart due to the buffeting of turbulence combined with the growing bow shock pressure wave.He can do it theoretically .
The altitude is just about perfect for the attempt .
I 'm more concerned about whether he 'll be able to keep from getting the piss kicked out of him at the Mach line .
Sure , it 'll be slight compared to what General Chuck punched through , but he 's a damn sight slighter than the X-1 .
On the other hand Kittenger hit Mach 0.96 around 60kft and I see no report of this effect so maybe it 's not a problem.It may still be a problem to punch through though .
There 's a spike in the speed/drag curve that 's greater or lesser depending on the drag characteristics ( coefficient of drag of cD ) .
If his outfit will be shaped to approximate a low cD body so much the better .
Since he 'll require some form of protection I doubt anyone would fault him for choosing a shape to fit his flight profile.If he kept up his falling profile he 's still slow to terminal velocity for the lower altitude , around 200 MPH , slower still if he 's either braking or blacked out and spinning .
Lower altitude here is taken to be where he could pop the chute and stay conscious even if he lost his mask , around 20 kft .
At that altitude and speed a full open would be quite a jerk , but no more than airborne troops practice , and which I 'm sure he 's handled previously .
If he 's designing his chute to be able to be opened higher/faster should he need or want to , he 'll include a drogue chute with a delay before the main , to slow him gradually to safe opening speed ( especially helpful if spinning ) .</tokentext>
<sentencetext>Interviewer: "Is that your crash helmet?
"Jose' Jimenez: " .
. .
oh I hope not.
"Using:standard atmosphere http://www.desktopaero.com/stdatm.html [desktopaero.com]Mach/altitude tables http://www.aerospaceweb.org/question/atmosphere/q0112.shtml [aerospaceweb.org]g acceleration http://en.wikipedia.org/wiki/Terminal\_velocity [wikipedia.org]and historical stuff on Col Joe.At 35 seconds he'll have fallen from 120kft to 80kft, going 1126 ft/s.
That's Mach 1 at sea level.
At 80kft it's Mach 1.15, giving some room for drag error.
10 seconds later he'd cross from stratosphere to tropopause where Mach 1 is lowest, but since it's only a matter of ~6 ft/s, this just gives him room to fall farther if need be but not required.
At 80kft the dynamic pressure will be around 55 lb/ft^2, so if fully loaded he weighs more than 165 lbs he'll still accelerate some, but not after the 45 second mark.
If he's outfitted like Kittenger was, he'll weigh up towards 300 lbs, and would still accelerate for some time.At 30 seconds he'll be falling at 965 ft/s, or Mach 0.98, well within the narrow transonic region of highest pressure, "max Q".
This is where aircraft prior to the Bell X-1 came apart due to the buffeting of turbulence combined with the growing bow shock pressure wave.He can do it theoretically.
The altitude is just about perfect for the attempt.
I'm more concerned about whether he'll be able to keep from getting the piss kicked out of him at the Mach line.
Sure, it'll be slight compared to what General Chuck punched through, but he's a damn sight slighter than the X-1.
On the other hand Kittenger hit Mach 0.96 around 60kft and I see no report of this effect so maybe it's not a problem.It may still be a problem to punch through though.
There's a spike in the speed/drag curve that's greater or lesser depending on the drag characteristics (coefficient of drag of cD).
If his outfit will be shaped to approximate a low cD body so much the better.
Since he'll require some form of protection I doubt anyone would fault him for choosing a shape to fit his flight profile.If he kept up his falling profile he's still slow to terminal velocity for the lower altitude, around 200 MPH, slower still if he's either braking or blacked out and spinning.
Lower altitude here is taken to be where he could pop the chute and stay conscious even if he lost his mask, around 20 kft.
At that altitude and speed a full open would be quite a jerk, but no more than airborne troops practice, and which I'm sure he's handled previously.
If he's designing his chute to be able to be opened higher/faster should he need or want to, he'll include a drogue chute with a delay before the main, to slow him gradually to safe opening speed (especially helpful if spinning).</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875444</id>
	<title>Re:Sound barrier</title>
	<author>Anonymous</author>
	<datestamp>1264266180000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>While you're right, drag does increase very quickly as one approaches the speed of sound, at such high altitude that increase will bring you from hardly any drag to a little bit of drag.</p><p>Now, for most aircraft this still makes supersonic flight hard even at high altitude. While drag is very low at these altitudes the lack of air to run an airbreathing engine creates a situation where an aircraft has both very low drag and very low thrust.</p><p>However, in the case of a falling object, thrust, in the form of gravity, remains fairly constant, and thus acceleration to very high velocities is easy. Likewise, the speed of sound in such thin air is very low, and therefore reaching supersonic speeds is very easy.</p><p>Of course, as the article mentions supersonic and transonic airflows tend to be a bit squirrelly. If it was me, I'd be doing wind tunnel testing before even attempting this.</p></htmltext>
<tokenext>While you 're right , drag does increase very quickly as one approaches the speed of sound , at such high altitude that increase will bring you from hardly any drag to a little bit of drag.Now , for most aircraft this still makes supersonic flight hard even at high altitude .
While drag is very low at these altitudes the lack of air to run an airbreathing engine creates a situation where an aircraft has both very low drag and very low thrust.However , in the case of a falling object , thrust , in the form of gravity , remains fairly constant , and thus acceleration to very high velocities is easy .
Likewise , the speed of sound in such thin air is very low , and therefore reaching supersonic speeds is very easy.Of course , as the article mentions supersonic and transonic airflows tend to be a bit squirrelly .
If it was me , I 'd be doing wind tunnel testing before even attempting this .</tokentext>
<sentencetext>While you're right, drag does increase very quickly as one approaches the speed of sound, at such high altitude that increase will bring you from hardly any drag to a little bit of drag.Now, for most aircraft this still makes supersonic flight hard even at high altitude.
While drag is very low at these altitudes the lack of air to run an airbreathing engine creates a situation where an aircraft has both very low drag and very low thrust.However, in the case of a falling object, thrust, in the form of gravity, remains fairly constant, and thus acceleration to very high velocities is easy.
Likewise, the speed of sound in such thin air is very low, and therefore reaching supersonic speeds is very easy.Of course, as the article mentions supersonic and transonic airflows tend to be a bit squirrelly.
If it was me, I'd be doing wind tunnel testing before even attempting this.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870362</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870658</id>
	<title>Re:Failed how?</title>
	<author>Anonymous</author>
	<datestamp>1264271160000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>If you miss the ground, are you then flying?</p></htmltext>
<tokenext>If you miss the ground , are you then flying ?</tokentext>
<sentencetext>If you miss the ground, are you then flying?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871510</id>
	<title>It vaires with altitude</title>
	<author>Sycraft-fu</author>
	<datestamp>1264277520000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Terminal velocity is cause by the resistance of the air equaling the force of gravity. Well, up higher you've got less air. Of course that also affects the speed of sound.</p></htmltext>
<tokenext>Terminal velocity is cause by the resistance of the air equaling the force of gravity .
Well , up higher you 've got less air .
Of course that also affects the speed of sound .</tokentext>
<sentencetext>Terminal velocity is cause by the resistance of the air equaling the force of gravity.
Well, up higher you've got less air.
Of course that also affects the speed of sound.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871410</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264276920000</datestamp>
	<modclass>Funny</modclass>
	<modscore>2</modscore>
	<htmltext>No, but it will (temporarily) give you a speedboost. It acts just like an afterburner, really.</htmltext>
<tokenext>No , but it will ( temporarily ) give you a speedboost .
It acts just like an afterburner , really .</tokentext>
<sentencetext>No, but it will (temporarily) give you a speedboost.
It acts just like an afterburner, really.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872992</id>
	<title>Skydive or Suit Flight?</title>
	<author>ehiris</author>
	<datestamp>1264244760000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>This would really only be interesting if no gear other than a parachute was used.<br>I wonder if the air resistance at that speed would crush him without re-enforcement gear.</p></htmltext>
<tokenext>This would really only be interesting if no gear other than a parachute was used.I wonder if the air resistance at that speed would crush him without re-enforcement gear .</tokentext>
<sentencetext>This would really only be interesting if no gear other than a parachute was used.I wonder if the air resistance at that speed would crush him without re-enforcement gear.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870414</id>
	<title>Re:Failed how?</title>
	<author>khallow</author>
	<datestamp>1264269360000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>There's a high risk of death for one thing.</htmltext>
<tokenext>There 's a high risk of death for one thing .</tokentext>
<sentencetext>There's a high risk of death for one thing.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871938</id>
	<title>Re:Supplemental question</title>
	<author>unixguy43</author>
	<datestamp>1264280040000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>If you light your fart will it give you extra thrust?</p></htmltext>
<tokenext>If you light your fart will it give you extra thrust ?</tokentext>
<sentencetext>If you light your fart will it give you extra thrust?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870602</id>
	<title>Does he get the record if he dies?</title>
	<author>tomhath</author>
	<datestamp>1264270680000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext>Strictly speaking the record will be for highest parachute jump. Assuming he's alive when he jumps he should get the record, even if he lands in several pieces.</htmltext>
<tokenext>Strictly speaking the record will be for highest parachute jump .
Assuming he 's alive when he jumps he should get the record , even if he lands in several pieces .</tokentext>
<sentencetext>Strictly speaking the record will be for highest parachute jump.
Assuming he's alive when he jumps he should get the record, even if he lands in several pieces.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870892</id>
	<title>Re:Physics novice, here:</title>
	<author>Anonymous</author>
	<datestamp>1264273200000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>4</modscore>
	<htmltext><p>The speed of sound depends on the density of the air.  Your acceleration would also be affected, drag is at a cube rate or fourth?!? rate.  Gravity depends on the distance from the center of the earth. Without doing the math, there should be some region where resistance is low, acceleration fairly high, allowing supersonic speed.</p><p>Some body armor, perhaps a viscous gel embedded with carbon fiber, seems wise!  Maybe a helmet to keep facial features from being torn removed..  Frost burn, too.</p></htmltext>
<tokenext>The speed of sound depends on the density of the air .
Your acceleration would also be affected , drag is at a cube rate or fourth ? ! ?
rate. Gravity depends on the distance from the center of the earth .
Without doing the math , there should be some region where resistance is low , acceleration fairly high , allowing supersonic speed.Some body armor , perhaps a viscous gel embedded with carbon fiber , seems wise !
Maybe a helmet to keep facial features from being torn removed.. Frost burn , too .</tokentext>
<sentencetext>The speed of sound depends on the density of the air.
Your acceleration would also be affected, drag is at a cube rate or fourth?!?
rate.  Gravity depends on the distance from the center of the earth.
Without doing the math, there should be some region where resistance is low, acceleration fairly high, allowing supersonic speed.Some body armor, perhaps a viscous gel embedded with carbon fiber, seems wise!
Maybe a helmet to keep facial features from being torn removed..  Frost burn, too.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871060</id>
	<title>I cannot believe everybody forgot the</title>
	<author>miknix</author>
	<datestamp>1264274700000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>3</modscore>
	<htmltext><p>What can possibly go wrong??<nobr> <wbr></nobr>/. memo</p></htmltext>
<tokenext>What can possibly go wrong ? ?
/. memo</tokentext>
<sentencetext>What can possibly go wrong??
/. memo</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</id>
	<title>The real question is ...</title>
	<author>tomhudson</author>
	<datestamp>1264267560000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext>... will he bounce?</htmltext>
<tokenext>... will he bounce ?</tokentext>
<sentencetext>... will he bounce?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871292</id>
	<title>Re:Failed how?</title>
	<author>Dachannien</author>
	<datestamp>1264276200000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>4</modscore>
	<htmltext><p><b>Paul Atreides:</b> They tried and failed?<br><b>Reverend Mother Mohiam:</b> They tried and died.</p></htmltext>
<tokenext>Paul Atreides : They tried and failed ? Reverend Mother Mohiam : They tried and died .</tokentext>
<sentencetext>Paul Atreides: They tried and failed?Reverend Mother Mohiam: They tried and died.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30872094</id>
	<title>Re:The real question is ...</title>
	<author>Anonymous</author>
	<datestamp>1264238160000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Even more pressing: if he doesn't bounce, will he blend?</p></htmltext>
<tokenext>Even more pressing : if he does n't bounce , will he blend ?</tokentext>
<sentencetext>Even more pressing: if he doesn't bounce, will he blend?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870196</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870944</id>
	<title>Re:Physics novice, here:</title>
	<author>Anonymous</author>
	<datestamp>1264273620000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><blockquote><div><p>captainskyhawk writes:<br>&gt; Isn't "terminal velocity" lower than the speed of sound?</p></div></blockquote><p>oh neat, the exteme sportsman talked about in TFA is posting to<nobr> <wbr></nobr>/.!</p><p>welcome and good luck!</p></div>
	</htmltext>
<tokenext>captainskyhawk writes : &gt; Is n't " terminal velocity " lower than the speed of sound ? oh neat , the exteme sportsman talked about in TFA is posting to / .
! welcome and good luck !</tokentext>
<sentencetext>captainskyhawk writes:&gt; Isn't "terminal velocity" lower than the speed of sound?oh neat, the exteme sportsman talked about in TFA is posting to /.
!welcome and good luck!
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870488</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871396</id>
	<title>Re:no sound = no sound barrier</title>
	<author>AmigaMMC</author>
	<datestamp>1264276740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Funny... breaking the sound barrier when there is no sound</p></div><p>The sound of the skydiver screaming: "oooooooooh craaaaaaaaap!"</p></div>
	</htmltext>
<tokenext>Funny... breaking the sound barrier when there is no soundThe sound of the skydiver screaming : " oooooooooh craaaaaaaaap !
"</tokentext>
<sentencetext>Funny... breaking the sound barrier when there is no soundThe sound of the skydiver screaming: "oooooooooh craaaaaaaaap!
"
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870070</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870204</id>
	<title>Hooray!</title>
	<author>Anonymous</author>
	<datestamp>1264267680000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Finally a use for my man-sized styrofoam wings!</p></htmltext>
<tokenext>Finally a use for my man-sized styrofoam wings !</tokentext>
<sentencetext>Finally a use for my man-sized styrofoam wings!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30885980</id>
	<title>Re:Supplemental question</title>
	<author>mjwx</author>
	<datestamp>1264354380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>If you fart while exceeding the speed of sound, will it make a noise?</p></div></blockquote><p>

Better yet, will it have an odour? What exactly is the speed of smell.</p></div>
	</htmltext>
<tokenext>If you fart while exceeding the speed of sound , will it make a noise ?
Better yet , will it have an odour ?
What exactly is the speed of smell .</tokentext>
<sentencetext>If you fart while exceeding the speed of sound, will it make a noise?
Better yet, will it have an odour?
What exactly is the speed of smell.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870472</id>
	<title>Re:Failed how?</title>
	<author>Mitchell314</author>
	<datestamp>1264269720000</datestamp>
	<modclass>Funny</modclass>
	<modscore>5</modscore>
	<htmltext>They're all still in orbit.</htmltext>
<tokenext>They 're all still in orbit .</tokentext>
<sentencetext>They're all still in orbit.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870168</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30875640</id>
	<title>Re:Braking deceleration</title>
	<author>aukset</author>
	<datestamp>1264268040000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>All high altitude jumps involve multiple stages of parachutes that gradually reduce the speed of the fall and provide some stability to the fall to prevent the object (aka human being) from spinning out of control. No doubt the same approach will be taken here. A small chute can be deployed initially to provide a gradual increase in drag as the atmosphere thickens, and once at a low enough altitude, deploy a larger chute to slow the decent to a survivable velocity.</p></htmltext>
<tokenext>All high altitude jumps involve multiple stages of parachutes that gradually reduce the speed of the fall and provide some stability to the fall to prevent the object ( aka human being ) from spinning out of control .
No doubt the same approach will be taken here .
A small chute can be deployed initially to provide a gradual increase in drag as the atmosphere thickens , and once at a low enough altitude , deploy a larger chute to slow the decent to a survivable velocity .</tokentext>
<sentencetext>All high altitude jumps involve multiple stages of parachutes that gradually reduce the speed of the fall and provide some stability to the fall to prevent the object (aka human being) from spinning out of control.
No doubt the same approach will be taken here.
A small chute can be deployed initially to provide a gradual increase in drag as the atmosphere thickens, and once at a low enough altitude, deploy a larger chute to slow the decent to a survivable velocity.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870620</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871372</id>
	<title>Re:I'll bet</title>
	<author>AmigaMMC</author>
	<datestamp>1264276680000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>God meant only for Superman to break the sound barrier without the aid of a machine.</htmltext>
<tokenext>God meant only for Superman to break the sound barrier without the aid of a machine .</tokentext>
<sentencetext>God meant only for Superman to break the sound barrier without the aid of a machine.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871190</id>
	<title>Re:A simple machine</title>
	<author>517714</author>
	<datestamp>1264275480000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext><p>Whether one uses a lever, a classic machine, or a balloon to raise an object is irrelevant.  The fall from it is not aided by the machine.  Using your (il)logic, one could not jump off the top of a mountain without using a machine - an inclined plane.</p></htmltext>
<tokenext>Whether one uses a lever , a classic machine , or a balloon to raise an object is irrelevant .
The fall from it is not aided by the machine .
Using your ( il ) logic , one could not jump off the top of a mountain without using a machine - an inclined plane .</tokentext>
<sentencetext>Whether one uses a lever, a classic machine, or a balloon to raise an object is irrelevant.
The fall from it is not aided by the machine.
Using your (il)logic, one could not jump off the top of a mountain without using a machine - an inclined plane.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870526</id>
	<title>Re:A simple machine</title>
	<author>Anonymous</author>
	<datestamp>1264270140000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>5</modscore>
	<htmltext>Not true at all. He wants to exceed the speed of sound by <em>falling</em> quickly, but the dang balloon keeps <em>lifting him up</em>! If anything, it's actively working against him!
<br>
<br>
On a more serious note, which simple machines would you say make up a balloon? Is it a pulley? A wedge? A lever? A balloon is just hot air in a sack. Nothing machine-like about that, though I suppose the mechanism for generating hot air may involve a machine, but that's tangential.</htmltext>
<tokenext>Not true at all .
He wants to exceed the speed of sound by falling quickly , but the dang balloon keeps lifting him up !
If anything , it 's actively working against him !
On a more serious note , which simple machines would you say make up a balloon ?
Is it a pulley ?
A wedge ?
A lever ?
A balloon is just hot air in a sack .
Nothing machine-like about that , though I suppose the mechanism for generating hot air may involve a machine , but that 's tangential .</tokentext>
<sentencetext>Not true at all.
He wants to exceed the speed of sound by falling quickly, but the dang balloon keeps lifting him up!
If anything, it's actively working against him!
On a more serious note, which simple machines would you say make up a balloon?
Is it a pulley?
A wedge?
A lever?
A balloon is just hot air in a sack.
Nothing machine-like about that, though I suppose the mechanism for generating hot air may involve a machine, but that's tangential.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870268</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871986</id>
	<title>Re:Supplemental question</title>
	<author>Anonymous</author>
	<datestamp>1264237200000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>No, the real question is "Can he exceed the speed of smell?"</p></htmltext>
<tokenext>No , the real question is " Can he exceed the speed of smell ?
"</tokentext>
<sentencetext>No, the real question is "Can he exceed the speed of smell?
"</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870558</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870298</id>
	<title>Just use a dummy first.</title>
	<author>starbugs</author>
	<datestamp>1264268520000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>4</modscore>
	<htmltext><p>Test the survivability of this by using a dummy with G-force sensors (just like we see on Mythbusters).<br>Then, if all goes well - try the stunt.</p><p>And please, use some kind of stabilizer to make sure you don't turn into a frisbee.</p><p>I do see potential in this 'experiment' if anyone ever needs to bail out on spaceship2.</p></htmltext>
<tokenext>Test the survivability of this by using a dummy with G-force sensors ( just like we see on Mythbusters ) .Then , if all goes well - try the stunt.And please , use some kind of stabilizer to make sure you do n't turn into a frisbee.I do see potential in this 'experiment ' if anyone ever needs to bail out on spaceship2 .</tokentext>
<sentencetext>Test the survivability of this by using a dummy with G-force sensors (just like we see on Mythbusters).Then, if all goes well - try the stunt.And please, use some kind of stabilizer to make sure you don't turn into a frisbee.I do see potential in this 'experiment' if anyone ever needs to bail out on spaceship2.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870176</id>
	<title>Re:Star Trek</title>
	<author>Anonymous</author>
	<datestamp>1264267380000</datestamp>
	<modclass>Flamebait</modclass>
	<modscore>-1</modscore>
	<htmltext>What is this Star Trek 11 you're talking about? There are only 9 Star Trek movies.</htmltext>
<tokenext>What is this Star Trek 11 you 're talking about ?
There are only 9 Star Trek movies .</tokentext>
<sentencetext>What is this Star Trek 11 you're talking about?
There are only 9 Star Trek movies.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870096</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30890890</id>
	<title>Joe Kittinger already broke sound barrier.</title>
	<author>Anonymous</author>
	<datestamp>1264438140000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p><div class="quote"><p>, he will exceed the speed of sound &mdash; the first person to do so without the aid of a machine.</p></div><p>/facepalm<br>Joe Kittinger already did this. I'd hope that the footage is on youtube as I saw it in college.</p><p>So all the questions about what will happen have already been answered.</p></div>
	</htmltext>
<tokenext>, he will exceed the speed of sound    the first person to do so without the aid of a machine./facepalmJoe Kittinger already did this .
I 'd hope that the footage is on youtube as I saw it in college.So all the questions about what will happen have already been answered .</tokentext>
<sentencetext>, he will exceed the speed of sound — the first person to do so without the aid of a machine./facepalmJoe Kittinger already did this.
I'd hope that the footage is on youtube as I saw it in college.So all the questions about what will happen have already been answered.
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30871566</id>
	<title>Re:I'll bet</title>
	<author>Anonymous</author>
	<datestamp>1264277940000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Seriously, that was my first thought.  If his shoulders and head, let's say, momentarily break the sound barrier (I have to imagine it would only be brief moments without thrust propulsion) that could be like hitting a brick wall for all we know, since his body would basically be colliding directly into the oncoming air at extremely high speeds.  At the very least I think his chances of maintaining control under these conditions is near nill.  Good luck to him...</p></htmltext>
<tokenext>Seriously , that was my first thought .
If his shoulders and head , let 's say , momentarily break the sound barrier ( I have to imagine it would only be brief moments without thrust propulsion ) that could be like hitting a brick wall for all we know , since his body would basically be colliding directly into the oncoming air at extremely high speeds .
At the very least I think his chances of maintaining control under these conditions is near nill .
Good luck to him.. .</tokentext>
<sentencetext>Seriously, that was my first thought.
If his shoulders and head, let's say, momentarily break the sound barrier (I have to imagine it would only be brief moments without thrust propulsion) that could be like hitting a brick wall for all we know, since his body would basically be colliding directly into the oncoming air at extremely high speeds.
At the very least I think his chances of maintaining control under these conditions is near nill.
Good luck to him...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870042</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870462</id>
	<title>What ever happened to Terminal Velocity?</title>
	<author>Zero\_\_Kelvin</author>
	<datestamp>1264269660000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext>I realize that Terminal Velocity will be higher with less air density, and the speed of sound should be lower, but do they both change so much that this is actually possible?</htmltext>
<tokenext>I realize that Terminal Velocity will be higher with less air density , and the speed of sound should be lower , but do they both change so much that this is actually possible ?</tokentext>
<sentencetext>I realize that Terminal Velocity will be higher with less air density, and the speed of sound should be lower, but do they both change so much that this is actually possible?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_23_152229.30870938</id>
	<title>Re:Anyone else think..</title>
	<author>Jeremi</author>
	<datestamp>1264273560000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>So I guess I'm not the only one to think this guy is going to die doing this stunt.</i></p><p>I think it's likely that he won't... he's done similarly dangerous stunts before and is still alive, so it's not like he's some clueless bozo who doesn't know what he's doing.  I think he (and his support team) have analyzed the risks and believe they have a reasonable chance of success, or they wouldn't be doing it.</p><p>I think the key piece of technology here is the altimeter that automatically opens his parachute for him.  He may not be conscious during most of the descent, but that doesn't mean it will be an uncontrolled descent.</p></htmltext>
<tokenext>So I guess I 'm not the only one to think this guy is going to die doing this stunt.I think it 's likely that he wo n't... he 's done similarly dangerous stunts before and is still alive , so it 's not like he 's some clueless bozo who does n't know what he 's doing .
I think he ( and his support team ) have analyzed the risks and believe they have a reasonable chance of success , or they would n't be doing it.I think the key piece of technology here is the altimeter that automatically opens his parachute for him .
He may not be conscious during most of the descent , but that does n't mean it will be an uncontrolled descent .</tokentext>
<sentencetext>So I guess I'm not the only one to think this guy is going to die doing this stunt.I think it's likely that he won't... he's done similarly dangerous stunts before and is still alive, so it's not like he's some clueless bozo who doesn't know what he's doing.
I think he (and his support team) have analyzed the risks and believe they have a reasonable chance of success, or they wouldn't be doing it.I think the key piece of technology here is the altimeter that automatically opens his parachute for him.
He may not be conscious during most of the descent, but that doesn't mean it will be an uncontrolled descent.</sentencetext>
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