Why doesn't the sky fall?

[Jim Ivey]

Bill
 In the south it booms everyday. In the summer.

Jim Ivey
> 
> From: Bill Glaze <billglaze at triad.rr.com>
> Date: 2005/08/15 Mon PM 05:25:50 EDT
> To: discussion at nsrca.org
> Subject: Re: Why doesn't the sky fall?
> 
> Why isn't the sky always booming?  Bill
> 
> randy10926 at comcast.net wrote:
> 
> > Air molecules are never at rest. They undergo constant random thermal 
> > motions of a variety of types. The simplest type is that of uniform 
> > translation. The mean speed is about 500 m/s which is greater than the 
> > speed of sound (340 m/s).
> >  
> > Randy
> >  
> >
> >     -------------- Original message --------------
> >     I thought it was time to stir the pot while we wait for the
> >     results from the Worlds.
> >     Can anyone explain why gravity doesn't pull all the air molecules
> >     down to earth?  Are they lighter than space?  What is their mean
> >     speed?
> >     I don't think this will help answer the weathervaning question and
> >     won't help us fly any better but I thought it might be fun.
> >     Jim O
> >
> 
> 

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