A thermodynamics professor had written a take home exam for his graduate students. It had one question: “Is Hell exothermic (gives off heat) or endothermic (absorbs heat)? Support your answer with a proof.”
Most of the students wrote proofs of their beliefs using Boyle’s Law (gas cools off when it expands and heats up when it is compressed) or some variant. One student, however, wrote the following: First, we need to know how the mass of Hell is changing in time. So, we need to know the rate that souls are moving into Hell and the rate they are leaving.
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