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Frohne, Vickie wrote:
Hewitt, in the "Conceptual Physics" books, distinguishes between
"heat" and "internal energy" very nicely. "Heat" is energy in motion,
i.e. energy that is in the act of being transferred.
I assume this was meant to say not just any energy,
but energy that is being transferred in thermal form.
Surely the heat-is-a-verb partisans don't think that
simple macroscopic F dot dx energy transfer is "heat".
Unfortunately, no matter how carefully heat-is-transfer
idea is expressed, it remains a Bad Idea.
It is occasionally true but _not generally true_ that
energy in motion can be divided into a purely thermal
piece and a purely nonthermal piece. It has been known
for over 200 years that thermal energy is not conserved
separately from other forms of energy.
People who fall victim to the thermal-transfer-of-energy
idea pay the price when it comes time to analyze a
dissipative transfer, such as the venerable cannon-boring
experiment.
Note that I don't care what you call thermal-tranfer-
of-energy. You can call it h&@t or whatever. It's
a Bad Idea, no matter what name you give it. For
details, see
http://www.monmouth.com/~jsd/physics/thermo-laws.htm
This posting is the position of the writer, not that of Benjamin
Thompson or Count Rumford.
This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.