A   P H Y S I C S   S T O R Y

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 A true story.  A thermodynamics professor had written
 a take home exam for his graduate students.  It had
 one question:

              Is hell exothermic or endothermic?
              Support your answer with a proof.

 Most of the students wrote proofs of their beliefs
 using Boyle's Law or some variant.  One student,
 however wrote the following:

      First, we postulate that if souls exist, then
      they must have some mass.

      If they do, then a mole of souls can also have
      a mass.  So, at what rate are souls moving into
      hell and at what rate are souls leaving?  I think
      that we  can safely assume that once a soul gets
      to hell, it will not leave.  Therefore, no souls
      are leaving.

      As for souls entering hell, lets look at the
      different religions that exist in the world today.
      Some of these religions state that if you are not
      a member of their religion, you will go to hell.
      Since there are more than one of these religions
      and people do not belong to more than one religion,
      we can project that all people and all souls go to
      hell.

      With birth and death rates as they are, we can
      expect the number of souls in hell to increase
      exponentially.

      Now, we look at the rate of change in volume in
      hell. Boyle's Law states that in order for the
      temperature and pressure in hell to stay the same,
      the ratio of the mass of souls and volume needs
      to stay constant.

      So, if hell is expanding at a slower rate than
      the rate at which souls enter hell, then the
      temperature and pressure in hell will increase
      until all hell breaks loose.

      Of course, if hell is expanding at a rate faster
      than the increase of souls in hell, than the
      temperature and pressure will drop until hell
      freezes over.

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 It was not revealed what grade the student got.