Two Ideal Gases, Each Consisting of N Monatomic Molecules, Are

Multiple Choice

Two ideal gases, each consisting of N monatomic molecules, are in thermal equilibrium with each other and equilibrium is maintained as the temperature is increased.A molecule of the first gas has mass m and a molecule of the second has mass 4m.The ratio of the internal energies E_4m/E_m is:

A) 1/4
B) 1/2
C) 1
D) 2
E) 4