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Q. The loaded cab of an elevator has a mass of 3.0 103 kg and moves 177 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. A 5.5µC and a 4.0µF capacitors are connected in series across a 24V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy?

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