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Article #1287microwave cooking
From: LUDVIK KOWALSKI
Date: Wed, 14 Sep 1994 04:07
Date: Wed, 14 Sep 1994 04:07
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1966 bytes
>Any Physical science text book from the 9th grade on up will discuss thermal
>energy transfer and specific heat. Obviously water molecules absorb micro wave
>radiation many times more efficiently than metals which should reflect this
>form of 'light' (EM radiation). A calorimeter is used to measure changes in
>temperature and so calculate changes in thermal energy and specific heats.
>Landon
You are right, Landon, that the amount of heat absorbed can always be measured
with a calorimeter. And that's what really counts in cooking. But I want to
PREDICT outcomes and I do not know how. Here is the problem; put yourself in
my place, and try to solve it.
Ten grams of water and ten grams of honey (or oil, blood, meat, wood, etc.)
are heated in a microwave oven under identical conditions. Which substance
will absorb more heat? What is the heat absorption ratio in two substances?
Try to answer before facts are known from direct measurements. I tried but was
not successful. The elementary physics textbooks I used did not prepare me to
deal with microwave cooking in quantitative ways. Knowing specific heats of
two selected substances does not help to solve the problem.
Ludwik Kowalski kowalski@apollo.montclair.edu
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 16cfd8,fe1d3fcbdf9f5dee,start X-Google-Attributes: gid16cfd8,public X-Google-ArrivalTime: 1994-09-14 18:14:49 PST Path: arc1-ca.pugleaf.net!bga.com!news.sprintlink.net!redstone.interpath.net!ddsw1!news.kei.com!travelers.mail.cornell.edu!news.tc.cornell.edu!news.cac.psu.edu!psuvm!auvm!APOLLO.MONTCLAIR.EDU!KOWALSKI Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU Newsgroups: bit.listserv.physhare Message-ID: <PHYSHARE%94091323115044@PSUVM.PSU.EDU> Date: Tue, 13 Sep 1994 23:07:00 EST Sender: Sharing resources for high school physics <PHYSHARE@PSUVM.PSU.EDU> From: LUDVIK KOWALSKI <KOWALSKI@APOLLO.MONTCLAIR.EDU> Subject: microwave cooking Lines: 21