If a person of mass 100.0kg climbs a 2.00m high set of stairs in 4.00s, how much work do they do?

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?