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Why isn't the sky always booming? Bill<br>
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<a class="moz-txt-link-abbreviated" href="mailto:randy10926@comcast.net">randy10926@comcast.net</a> wrote:<br>
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cite="mid081520052122.12594.4301077D0001278C000031322200751150C0CDC7CFCE970B020E9D@comcast.net"
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<div>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). </div>
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<div>Randy</div>
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<div><font face="Arial" size="2">I thought it was time to stir the
pot while we wait for the results from the Worlds.</font></div>
<div><font face="Arial" size="2">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?</font></div>
<div><font face="Arial" size="2">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.</font></div>
<div><font face="Arial" size="2">Jim O</font></div>
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