At 10-mph wind speed a turbine generates 1.5 kW power. What would the output power be if the wind speed increases to 20 mph (assume that stall does not occur at that speed)? The blades of a...

At 10-mph wind speed a turbine generates 1.5 kW power. What would the output power be if the wind speed increases to 20 mph (assume that stall does not occur at that speed)?

The blades of a three-blade horizontal axis wind turbine are 5 m long. What is the power delivered by the air stream to the blades for the wind speed of 8 m/s? (Specific mass of air is 1.224 kg/m3.)