25%) Pro degree is 08 0.7*1.8 Consider a wind turbine with an 80-m-diameter rotor that is rotating at 20 rpm under steady winds of 30 electricity), determine (a) the power produced in kW, (b) the tip speed of the blade, in km/h; (c) revenue km/h. Assuming a wind turbine efficiency of 35% (converting 35% of the kinetic energy of the wind to generated if the electricity is sold to the utility company at $0.06/kWh. The density of air is 1.2 kg/m³. 8013314