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From: bobp@petfe.UUCP (Dan Masi)
Newsgroups: net.puzzle
Subject: Re: Re: Warped cookie sheets
Message-ID: <545@petfe.UUCP>
Date: Mon, 4-Nov-85 16:17:15 EST
Article-I.D.: petfe.545
Posted: Mon Nov  4 16:17:15 1985
Date-Received: Tue, 5-Nov-85 09:32:46 EST
Organization: Perkin-Elmer DSG, Tinton Falls, N.J.
Lines: 17

<<>>

>>You hole-expansion-or-contraction debaters seem to be
>>overlooking the fact that when I put a pan of cookies
>>in the oven the cookie sheet spontaneously warps itself
>>when it heats up a bit.
>_____________________________________________________
>Warping implies non-uniform heating.

Hi Al!  This isn't necessarily true... what about a cookie sheet 
with a coating (e.g. Teflon, Silverstone, etc.) on it?  Seems the
coating material would probably have a different thermal expansion
than the sheet itself, thus warping the sheet when heated.

dbdan