Two sources of waves are in phase and produce identical waves. these sources are mounted at the corners of a square and broadcast waves uniformly in all directions. at the center of the square, the waves will always produce constructive interference no matter which two corners of the square are occupied by the sources?

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.