What law describes energy that is conserved, being neither created nor destroyed but convertible?

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Multiple Choice

What law describes energy that is conserved, being neither created nor destroyed but convertible?

Energy cannot be created or destroyed in a closed system; it only changes form. This is why energy is conserved—the total amount of energy stays the same even as it shifts between forms like potential, kinetic, chemical, electrical, light, and heat. A simple example is a swinging pendulum: as it moves, potential energy turns into kinetic energy and back again, and the total energy stays constant (ignoring air resistance and friction). The other ideas aren’t about keeping the total energy constant: the second law of thermodynamics deals with entropy and the direction of processes, not the count of energy; Newton’s law of cooling describes how an object's temperature changes toward its surroundings; and charge conservation is about electric charge, not energy.

Energy cannot be created or destroyed in a closed system; it only changes form. This is why energy is conserved—the total amount of energy stays the same even as it shifts between forms like potential, kinetic, chemical, electrical, light, and heat. A simple example is a swinging pendulum: as it moves, potential energy turns into kinetic energy and back again, and the total energy stays constant (ignoring air resistance and friction). The other ideas aren’t about keeping the total energy constant: the second law of thermodynamics deals with entropy and the direction of processes, not the count of energy; Newton’s law of cooling describes how an object's temperature changes toward its surroundings; and charge conservation is about electric charge, not energy.

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