Physics please show work for brainliest

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

The particles that are found in the nucleus of an atom are

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.