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Q. The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 157 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?

Q. Suppose 140 moles of a monatomic ideal gas undergo an isothermal expansion from 1.00 m^3 to 4.00 m^3. What is the temperature at the beginning of this process? What is the temperature at the end of this process? How much work is done by the gas during this expansion?

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