A person in good physical condition is able to produce 100 W of useful power for several hours at a stretch, say by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time, answer the subsequent questions about such a power generation method: 1. How many people on such devices would it take to run a 4.2-kW electric clothes dryer? Ndryer= 2.  How many people on such devices would it take to replace a large electric power plant that generates 820 MW?Nplant =

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