''' 
 Name : 

 PHYS 114 - Rec 3
 Breaking the law!  -
 
 - Create N=25 ideal gas particles in a box. The box will have dimensions of 1,1,1.
   Place all the particles in the center of the box. If you would like to draw the sides of 
   the box, feel free to do so (see PHYS 113 rec #5).

 - Give each particle an initial velocity of 1, pointed in a random direction (I
   will check this!).

 - Let the particles evolve by simply moving them, there is no force acting on them
   and they do not interact. When they reach the ends of the box, let them bounce off
   elasticly This time however, I would like you to update the particles motion using
   velocity verlet (see link). Without an acceleration, velocity verlet and the old way
   of integration are the same.

 - Let the code run for 10 seconds. Now take every particle and reverse its velocity. 
   Run it for another 10 seconds. If you've done everything right, the particles are right
   back where they started!

 - Now put the particles in a gravitational field (i.e. F = -g (zhat) ). Repeat the same
   procedure and you will get the same results. Does this violate the 2nd law of
   thermodynamics? Explain what is going on here!
'''
