Calculate the power coefficient of a wind turbine that extracts 17.9 MW of mechanical power from wind moving at 17 meters per second at 14.7 psi and 28 °C. Each rotor blade is
63 meters long and the hub radius is 3 meters.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)