What are the two types of energy found in gravity?

Which statement best explains why an object weight less on mercury than it does on earth

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.