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Also, we need to worry about what happens | by skern | 2007-10-22 06:09:19 |
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Of course it is | by Arachnid | 2007-10-22 09:02:53 |
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Meteors. (n/t) | by skern | 2007-10-22 09:34:28 |
| no... |
by woohoo |
2007-10-24 03:40:10 |
that would imply that meteors start their free fall in the atmosphere and then reach their terminal "evaporating" velocity, which they obviously don't - on the contrary, they usually arrive from space (where terminal velocity is c ;o) with a much higher speed than they could ever achieve in a planet's atmosphere, no matter how big that planet was. when entering the atmosphere, they have enough kinetic energy to evaporate by the frictional heat.
see also http://en.wikipedia.org/wiki/Joseph_Kittinger
the guy jumped (with a pressure suit of course ;o) from 102,800 feet (31,330 m) and reached a terminal velocity of 614 mph (988 km/h) high up in the thin atmosphere before being slowed down again by the denser air films in lower altitudes - and he did not catch fire ;o)
the terminal velocity for a free falling human being anywhere significantly lower than that (i.e. normal parachute jumps) is around 200 mph (320 km/h), and this might be roughly the case for dust puppy - he might not even reach that, due to his fluffy nature ;o) |
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