What are the benefits and drawbacks of international cooperation in space exploration?

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

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal