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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!petsd!petfe!bobp
From: bobp@petfe.UUCP (Bob Philhower)
Newsgroups: net.physics
Subject: Bottled birds?
Message-ID: <457@petfe.UUCP>
Date: Tue, 27-Aug-85 17:04:28 EDT
Article-I.D.: petfe.457
Posted: Tue Aug 27 17:04:28 1985
Date-Received: Wed, 28-Aug-85 09:43:24 EDT
Organization: Perkin-Elmer DSG, Tinton Falls, N.J.
Lines: 20

<<>>
OK, all you bird-lovers (P?); anyone want to comment on this situation?

Given:  A bottle, (of arbitrary size), containing one (1) bird 
(of arbitrary species).  The bottle is placed on a garden-variety
bathroom scale (arbitrarily accurate), and the weight of the system
is measured with the bird sitting on the bottom of the *closed*
bottle.  Now the bird decides to fly around inside the bottle, and
the weight is read again.  Any weight difference?

Now, what if the bottle cap (massless, of course) is removed; again,
any weight difference?  What happens as the bird flies to the top of,
and eventually out of, the bottle?

We've tried this, but after squeezing a robin through the bottle neck,
it doesn't seem to want to fly.

-dan-