Which of the following is an almost reversible process?
A. The explosion of hydrogen and oxygen to form water.
B. Heat transfer through thick insulation.
C. The adiabatic free expansion of a gas.
D. A slow isothermal compression of a gas.
E. A slow leakage of gas into an empty chamber through a small hole in a membrane.
Answer: D
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When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
A) less than 40 J. B) more than 40 J. C) of 40 J.
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The kilowatt-hour is a unit of
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