If an astronaut holds a 5-kg ball 2 meters (m) above the ground on the Moon, does it have the same potential energy it did when the astronaut held that ball 2 m above the ground on Earth?

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms