Test: High School Physics

1.

Which of the following represents the first law of thermodynamics?

While melting, an ice cube remains at the same temperature

If a refrigerator is unplugged, eventually everything inside of it will return to room temperature

After falling down the hill, a ball's kinetic energy plus heat energy equals the initial potential energy

The specific heat of an object explains how easily it changes temperatures

Two systems in equilibrium with a third system are in equilibrium with each other

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