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About a week ago I suggested the following
student-oriented problem:
* * * * * * * * * * * * * * * * * * * * * * * *
"By how many degrees will the water temperature
change if a C=10 F capacitor is charged from a
3 volts battery and then discharged through a
resistor R immersed in 50 grams of water? Assume
the procedure is repeated twenty times. The mass
of the resistor and the mass of the styrofoam cup
are negligible. Heat received by connecting wires
can be ignored because their resistance is much
smaller than R.