According to the kinetic theory of gases, the molecules in the air in a particular room must have some kinetic energy which depends on the temperature in the room. In order to extract this energy to do mechanical work I would need for the object receiving this energy to be at a much colder temperature. This is best explained by
A. the Second Law of Thermodynamics.
B. Newton's laws of motion.
C. the law of gravity.
D. conservation of energy.
Answer: A
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