A simple circuit is wired with a battery, a switch, and a bell.

Question

When the switch is turned on, what energy transformations will occur?

Answer 1

When the switch is turned on, the battery converts chemical energy into electrical energy. This electrical energy then flows through the circuit and is transformed into sound energy in the bell.

Answer 2

A woman runs as shown.
What main energy conversion occurs?
Thermal energy changes into mechanical energy because heat provides energy for motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.

Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.

Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.

Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.

Answer 3

Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner's motion.