Which of the following is an example of the law of conservation of energy?
electrical energy transforming into sound energy in a speaker
running out of energy after exercising for a long time
running out of gas in a car
turning lights off when you aren't using them

a. electrical energy transforming into sound energy in a speaker

Explanation:

the law says that energy can neither be created or destroyed. answer A is an example of this because the electrical energy is turning into a different type of energy. That means the electric energy was not destroyed, it was turned into a different energy and energy was not created it just changed the type of energy.

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