Question

What does the law of conservation of energy state about energy in a closed system?

Energy cannot be created or destroyed.
Energy can be created but not destroyed.
Energy can be destroyed but not created.
Energy can be either destroyed or created.

Answer 1

The law of conservation of energy states that in a closed system, energy cannot be created or destroyed; it can only be transformed from one form to another. Therefore, the correct option is:

**Energy cannot be created or destroyed.**