A 1-m diameter penstock is 10 km long and carries water to an impulse turbine at a

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A 1-m diameter penstock is 10 km long and carries water to an impulse turbine at a flow rate of 2 m³/s. If the turbine/generator is 83 percent efficient, what power can be extracted if the elevation difference between the reservoir and the nozzle is 650 m? The jet (nozzle) diameter is 16 cm. What should Pelton wheel diameter for maximum efficiency be if 360 rpm is to be maintained? what is the power specific in EE ( English engineering ) units?