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<DIV>In a message dated 8/15/2005 7:13:19 PM Central Daylight Time,
natpenton@centurytel.net writes:</DIV>
<DIV>Nat</DIV>
<DIV>Because your fingers are not oily and dont slip off of the sticks.</DIV>
<DIV>Buddy</DIV>
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<DIV><FONT face=Arial size=2>Randy, thats excelent, you win !! There are
comments the F3A electrics are easier to fly than the IC jobs.
Why ? Nat</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mailto:wgalligan@goodsonacura.com
href="mailto:wgalligan@goodsonacura.com">Wayne Galligan</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 15, 2005 5:32
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Why doesn't the sky
fall?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>SO..... in other words... Newtons theory about
the apple falling on his head about sums it up.... right?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>WG</FONT></DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mailto:randy10926@comcast.net
href="mailto:randy10926@comcast.net">randy10926@comcast.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 15, 2005 4:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Why doesn't the sky
fall?</DIV>
<DIV><BR></DIV>
<DIV> At the top of a planet's atmosphere,
particles are running around in all directions, at all of the various
speeds corresponding to the kinetic temperature, and to the predictions of
the Maxwell-Boltzmann distribution. Some of the particles will be headed
upwards, some downwards, and some sideways. Some of them will be moving
slowly, some at an average speed, and some very quickly. Whether a planet
will hold onto an atmosphere will depend upon the motions of those
particles which happen to be moving upwards at a much higher than average
speed. If those particles are moving upwards at less than the planet's
escape velocity (the speed which an object must be traveling at in order
to escape the planet's gravity, and go off into space), then the particles
will follow curved paths which are ellipses with a focus at the center of
the planet, and will go up for a while, and then fall back into the
atmosphere. (This discussion assumes that we are in the very outermost
reaches of the atmosphere, where there is so little gas that the particles
don't collide with other particles very often. If we were talking about a
lower region, the particles would be deflected from their paths, and
change their energies, so frequently that any discussion of motions which
resemble orbital motions would be
pointless.)<BR> However, if the particles
were moving upwards <B><I>faster</I></B> than the planet's escape
velocity, they would follow hyperbolic paths which would take them out
into space, never to return. Of course, only those particles which
happened to be heading upwards at very high speeds would follow such
paths, but as already discussed, there is a continual shuffling of
particle motions and speeds, and as a result, in a short while, particles
which did not originally have such motions would end up with motions
identical to those particles which had been lost, and then those particles
would also be lost.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Simple ain't it.</DIV>
<DIV> </DIV>
<DIV>Randy</DIV>
<DIV> </DIV>
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Original message -------------- <BR>
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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></BLOCKQUOTE></BLOCKQUOTE>
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<P></P>Internal Virus Database is out-of-date.<BR>Checked by AVG
Anti-Virus.<BR>Version: 7.0.338 / Virus Database: 267.9.7/60 - Release Date:
7/28/2005<BR></BLOCKQUOTE><BR><BR>Internal Virus Database is
out-of-date.<BR>Checked by AVG Anti-Virus.<BR>Version: 7.0.338 / Virus
Database: 267.9.7/60 - Release Date: 7/28/2005<BR></FONT></BLOCKQUOTE></DIV>
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