Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site lasspvax.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!whuxl!houxm!vax135!cornell!lasspvax!norman From: norman@lasspvax.UUCP (Norman Ramsey) Newsgroups: net.puzzle,net.math Subject: Re: Polar Bear Problem Sequel Message-ID: <623@lasspvax.UUCP> Date: Fri, 25-Oct-85 12:39:18 EDT Article-I.D.: lasspvax.623 Posted: Fri Oct 25 12:39:18 1985 Date-Received: Sat, 26-Oct-85 19:59:05 EDT References: <361@proper.UUCP> <367@faron.UUCP> <10755@ucbvax.ARPA> Reply-To: norman@lasspvax.UUCP (Norman Ramsey) Distribution: net Organization: LASSP, Cornell University Lines: 20 Xref: watmath net.puzzle:1086 net.math:2429 Summary: In article <10755@ucbvax.ARPA> c160-3ay@ucbzooey.UUCP (Ranjit Bhatnagar) writes: >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! The hole expands. Thermal expansion dilates a whole object. Some people like to think about metal doughnuts; the doughnut does the same thing on heating whether the hole is present or not. I personally would rather think about dilates, or just renormalizing (there's that word again) the measure of distannce to obtain the original object. -- Norman Ramsey ARPA: norman@lasspvax -- or -- norman%lasspvax@cu-arpa.cs.cornell.edu UUCP: {ihnp4,allegra,...}!cornell!lasspvax!norman BITNET: (in desperation only) ZSYJ at CORNELLA US Mail: Dept Physics, Clark Hall, Cornell University, Ithaca, New York 14853 Telephone: (607)-256-3944 (work) (607)-272-7750 (home)