Match the symbols used in electric circuit diagrams to their functions. +
a device that converts electric
energy into sound energy
a device that glows when it
receives current
a device that provides energy
to a circuit
a device that starts or stops
the flow of current

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.