Question

select the correct answer. which device is using a motor? a. a water heater creates heat energy from electric energy. b. a waterfall rotates a waterwheel to turn an axle. c. a body massager uses electric energy to move back and forth. d. a solar charger creates electric energy from the sun.

Explanation:

A motor converts electrical energy into mechanical energy. A body massager uses electric energy to move back and forth, which is an example of a device using a motor to create mechanical - motion. A water heater converts electrical energy into heat energy, a waterfall rotating a waterwheel is a conversion of gravitational - potential energy to mechanical energy, and a solar charger converts solar energy into electrical energy.

Answer:

C. A body massager uses electric energy to move back and forth.