Re: Why does a spun boiled egg spin longer than a spun raw egg?

From: Gregory L. Hansen (glhansen_at_steel.ucs.indiana.edu)
Date: 10/28/04 

Date: Thu, 28 Oct 2004 13:58:04 +0000 (UTC)

In article <eca320d0.0410272030.56c564@posting.google.com>,
Edward Green <spamspamspam3@netzero.com> wrote:
>glhansen@steel.ucs.indiana.edu (Gregory L. Hansen) wrote in message
>news:<cletjg$m1n$3@hood.uits.indiana.edu>...
>
>> More curious than that is, depending on how you flick it, it wobbles
>> around a little before spinning up to speed. I tried it just now to make
>> sure my memory wasn't playing tricks, and I could watch the angular
>> acceleration.
>
>Hypothesis?

It might be a little far-fetched because of the time scales, but how about
elasticity of the egg white?

Or possibly I didn't spin it in the plane of the table. And then the
shell, being rigid and constrained by the table, took the appropriate
plane of rotation before the inside did.

>
>> High school project? Tie the phenomenon to the stability of spacecraft,
>> effects on Earth's climate, the performance of artificial heart valves.
>> Everybody wants to not die, get some NIH money.
>
>How about condensation of early solar system.

That's interesting in an inspirational, edifying sort of way. But
whenever you can, you should tie your research into helping the funders to
not die.

>
>> If the Army can spend
>> half a million dollars figuring out how a fly lands on the ceiling, we
>> ought to be able to make something out of this.
>
>Did they?

I'm not sure how much they spent, really. But it was a lot. I think they
learned that flies grab on with their front legs and then flip around.

>
>I made some amusing insect/ceiling observations. I discovered one of
>those very long legged flys -- the kind that look like large
>mosquitos, but aren't -- hanging vertically from the overhead by its
>two front feet. Dead, right? I blew on it gently. Some kicking of
>free limbs. Some more kicking. Finally, I didn't see the exact
>mechanism, it pulled its forefeet off the ceiling, and flew away. I
>guess that's how it hangs out for the night.

I've seen a few articles about sticky feet lately. At least some bugs
have gecko feet. Lots of tiny little hairs sticking out the bottoms that
cling to things by Van Der Waals forces. They've been promising Gecko
Tape, but I haven't seen it yet in stores. 

-- 
"Yes, I revere you much, honored ones, and wish to fart in response." -- 
Aristophanes, Clouds

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