Question

Eva is in a closed dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes.
If this room is a closed system, what happens to the total amount of energy in the room?

A.
It remains constant.

B.
It increases.

C.
It decreases.

D.
It increases, then decreases.

Answer 1

A. Did this myself