Total required annual electrical energy output from the, Physics

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Total required annual electrical energy output from the

Total required annual electrical energy output from the wind farm =120 TJ
Max number of turbines for which there is space on the farm =20.
Average annual wind speed at the site= 9.0 ms^-1

a) Deduce that the average power output required from one turbineis 0.19 MW
b) Estimate the blade radius of the wind turbine that will give0.19 MW Power output. (density of air= 1.2 kg m^-3)

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