Google Code-in 2011 Organization SymPy Task Fill in missing tests for sympy.physics module in test

completed by: David Ju

mentors: Matthew Rocklin, Vladimir Perić, Stefan Krastanov, Aaron Meurer

Please see http://code.google.com/p/sympy/issues/detail?id=2786 for full information on this task.

Please read https://github.com/sympy/sympy/wiki/gci-2011-landing before completing any tasks for SymPy.