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John Mallinckrodt writes:
...
But Jay... Here's a typical problem to solve:
An insulated liter container with 0.09 kg of water is shaken
by rapidly raising and then lowering the container 1 meter.
Assume that all of the motion energy raises the temperature
of the water 0.5 K.
What would be the minimum number of shakes required?
Why is it easier to souve such problems using calories rather than
joules?