Awind powered generator converts wind energy into electrical energy. assume that the generator converts a fixed fraction of wind energy intercepted by its blades into electrical energy. for wind speed v electric power will be proportional to
a) v⁴
b) v²
c) v
d) v³

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).