Suppose you go to Six Flags again, but now you decide to go on the Wonder Woman Coaster ride instead of the Superman. The maximum height of this ride is 37m. You’re released from rest from the top of the ride, and you notice that your speed varies as the ride progresses. Calculate: 1. Your speed when you’re at a height of 30m.
2. The maximum speed you have throughout the ride.
3. The height at which your speed is half the maximum speed.

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).