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 decreases.

B.
It remains constant.

C.
It increases.

D.
It increases, then decreases.

Answer 1

@iambatman

Answer 2

remains constant

Answer 3

matter and energy cannot join or leave a closed system.

Answer 4

thanks

Answer 5

you're welcome