If your electrical bill is $100 per month and electricity costs $0.10/kW-hr, what is the rate at which you consume electrical power, assuming constant usage? If you live in a place where you have fairly constant winds with an average speed of 10 m/s, and the average air density is 1.1 kg/m3, how large of a wind turbine would you have to build to supply your household energy needs, assuming a turbine efficiency of 35%?
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