Thought this was funny:

The following is an actual question given on a University of
Washington chemistry mid-term. The answer by one student was so
"profound" that the Professor shared it with colleagues, via the
Internet, which is, of course, why we now have the pleasure of
enjoying it as well:

Bonus Question: Is Hell exothermic (gives off heat) Or endothermic
(absorbs heat)?

Most of the students wrote proofs of theirbeliefs using Boyle's Law:
(Gas cools when it expands and heats 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 at which souls are moving into Hell and the
rate at which they are 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 how many souls are entering Hell, let's look at the different
religions that exist in the world today. Most of these religions
state that if you are not a member of their religion, you will go to
Hell. Since there is more than one of these religions and since
people do not belong to more than one religion, we can project that
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 of the volume in Hell because
Boyle's Law states that in order for the temperature and pressure in
Hell to stay the same, the volume of Hell has to expand
proportionately as souls are added. This gives two possibilities:

1. 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.

2. If Hell is expanding at a rate faster than the Increase of souls
in Hell, then the temperature and pressure will drop until Hell
freezes over.
So which is it?

If we accept the postulate given to me by Teresa during my freshman
year that, "It will be a cold day in Hell before I sleep with you,"
and take into account the fact that I slept with her last night,
then number two must be true, and thus I am sure that Hell is
exothermic and has already frozen over. The corollary of this theory
is that since Hell has frozen over, it follows that it is not
accepting any more souls and is therefore, extinct......leaving only
Heaven, thereby Proving the existence of a divine being which
explains why, last night, Teresa kept shouting "Oh my God."

THIS STUDENT RECEIVED THE ONLY "A"