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From: jeff@rtech.UUCP (Jeff Lichtman)
Newsgroups: net.puzzle,net.math
Subject: Re: Expanding metal torus spoiler
Message-ID: <710@rtech.UUCP>
Date: Wed, 23-Oct-85 05:44:24 EDT
Article-I.D.: rtech.710
Posted: Wed Oct 23 05:44:24 1985
Date-Received: Fri, 25-Oct-85 02:51:15 EDT
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Organization: Relational Technology, Alameda CA
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Xref: watmath net.puzzle:1071 net.math:2419

> 
> By the way: heat causes metal to expand.  If you have a piece of metal
> with a spherical hole in it, does the hole expand, contract, or remain
> the same when the metal is heated?  What about a square hole?  I don't
> know the answer!
> 
> ...ranjit bhatnagar

The hole will expand.  When an object expands because of heat, it turns into
a larger version of the object.  That is, the coefficient of expansion is
the same in all directions (for most substances), so the object must expand
uniformly.
-- 
Jeff Lichtman at rtech (Relational Technology, Inc.)
"Saints should always be judged guilty until they are proved innocent..."

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