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From: dnc@dartvax.UUCP (David Crespo)
Newsgroups: net.physics
Subject: Re: heating and cooling
Message-ID: <663@dartvax.UUCP>
Date: Tue, 31-Jan-84 20:04:33 EST
Article-I.D.: dartvax.663
Posted: Tue Jan 31 20:04:33 1984
Date-Received: Thu, 2-Feb-84 01:32:08 EST
References: <143@cbnap.UUCP>
Organization: Dartmouth College
Lines: 26

in a perfect insulator, such as a thermos, no matter what temp
you keep it at, it won't lose any heat, so then it would seem that 
one would just as soon cork it up and wait, since lowering it to final
temp before or after will not affect its temp wwhen 


final. however, no insulator is perfect, except thermos brand thermoses,
which they don't have inthis part of arkansas, so:
case 1 is i have milk and i have coffee, both in insulators (aha, this 
means above, that the milk must also be in a thermos, else it will cool
while we wait, in which case we either get a lower final temp when we pour it
in as we return, but longer (useless) maxheat (strictly speaking), or
a higher finaltemp since we pour it in earlier, assuming milk at greater
than room temp, or if milktemp init is lower htan room, it will warm, 
and when poured in later it will reach a higher final temp than if it
were poured in before leaving, though the coffee hen is at a lower temp 
during departure, so we need some measure of degree-minutes, which we
are trying to maximize, or a highest final appreciation temp, which is what
I assume we want, unless we want to be really clever and don't care, since we 
are realy going for perfect temp, not maxtemp. see?
this all assumes of course that we have a perfect insulator,
(it doesn't matter whether we pour the milk in the coffee or
vice versa, or both in a third container (unless that would take
too long))so that gat least on temp remains constant. what if we let the coffee 
(since we have only a small insulator), then final temp falls,