9
lesson pretestMultiple Choice

Pretest

Question 9 • Physics I

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

Answer
A
Energy can be either destroyed or created.
B
Energy can be destroyed but not created.
C
Energy cannot be created or destroyed.
D
Energy can be created but not destroyed.

Explanation

The law of conservation of energy states that the total energy in a closed system remains constant. Energy may change form or move between parts of the system, but it cannot be created or destroyed. Therefore, “Energy cannot be created or destroyed” is correct.

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