Wo slightly out of tune instruments will create beats when the same note is played. this is a pattern of louder and softer sounds. a piano tuner uses this method to tune a piano. when two waves overlap, they each act as if the other is not there. this interaction is kno

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.