Which is true according to the law of conservation of energy?

Question

A.
In a closed system, the total amount of energy in the universe keeps on changing.
B.
The supply of energy is limited, so it is essential to conserve it.
C.
In a closed system, energy can be created and destroyed.
D.
In a closed system, energy cannot be used faster than it is created.
E.
In a closed system, the total energy always remains constant.

Answer 1

E. In a closed system, the total energy always remains constant.

The law of conservation of energy states that energy cannot be created or destroyed in an isolated system; it can only change forms. Thus, the total amount of energy remains constant.