The energy available to primary consumers in an energy pyramid is 800 kilocalories. Approximately how much energy is used by the primary consumers for their physical functions?

720 kilocalories
80 kilocalories
780 kilocalories
800 kilocalories

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.