The summer solstice occurs on about
A.21-Jun
B.22-Apr
C.22-May
D.21-Jul
A.21-Jun
B.22-Apr
C.22-May
D.21-Jul
A.coefficient of performance against tip speed ratio
B.maximum power available in the wind against wind speed
C.power delivered by the rotor against wind speed
D.maximum power available in the wind against speed at the tip of the rotor
A.? = 15(ts-6)
B.? = 15(ts+6)
C.? = 15(ts-12)
D.? = 15(ts-12)
A.kinetic energy
B.enthalpy
C.potential energy
D.pressure
A.Violet
B.Yellow
C.Blue
D.Red