Two waves are traveling through a tube. Wave X has an amplitude of 1 cm, and wave Y has twice the amplitude of wave X. The energy of wave Y is A.
four times that of wave X.
B.
two times that of wave X.
C.
one-fourth times that of wave X.
D.
half times that of wave X.

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.