Why doesn't the sky fall?

[randy10926 at comcast.net]

How loud a BOOM would 1 air molecule make anyway?

Randy

-------------- Original message -------------- 

> Bill 
> In the south it booms everyday. In the summer. 
> 
> Jim Ivey 
> > 
> > From: Bill Glaze 
> > 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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