[meteorite-list] Effects of travel through space on comets?

From: Michael L Blood <mlblood_at_meteoritecentral.com>
Date: Sat, 09 Dec 2006 06:44:00 -0800
Message-ID: <C1A00BB0.3129D%mlblood_at_cox.net>

Ed,
        Your comment about that diving from elevated heights "the water
becomes awful hard" stirred a question in me that has been nagging me
for some time.
        I have heard jumping into water at 100 feet can result in breaking
your ankles and that at 300 feet the human body reacts to water the
same way it would to concrete.
        However, how high are those Mexican Divers? - the ones that dive
off the high cliffs and when they hosted the Olympics they made it an
official Olympic event? It over 100 feet, why aren't they breaking their
wrists and neck?
        Anyone know?
        Michael
        

on 12/8/06 7:38 PM, E.P. Grondine at epgrondine at yahoo.com wrote:

> Hi all -
>
> I was just wondering if any of you have given any
> thought to this -
>
> While we generally think of space as a vacuum, in fact
> it is not. There are "dust" particles (some of them
> chonrdules?), and if I remember correctly, about 1
> molecule of hydrogen per cubic meter -
>
> Now at normal speeds, this would be a vacuum. But
> comets don't travel at "normal" speeds. I am reminded
> of the swimmer who dives from too high a height - the
> water becomes awful hard.
>
> I wonder if drag might change a comet's debris stream,
> putting larger pieces at the head, and smaller pieces
> at the end?
>
>
> good hunting,
> Ed
>
>
>
>
>
>
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Received on Sat 09 Dec 2006 09:44:00 AM PST