The Moon (mass = 7.35 x 1022 kg) is 3.84 x 108 m from the Earth
(mass = 5.98 x 1024 kg). How much
gravitational force do they exert on
each other?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system