A piston/cylinder arrangement is cycled such that the pressure/volume relation follows a sine wave, P = A sin (n ? V), where A is the amplitude of the sine wave (corresponding to how high the piston goes in the cylinder), V is the volume, and n is a number that can be 1, 2, 3, ... . Assume that A=1. Determine the work done by the piston. Propose a physical meaning to the term "n" in the above equation.