A speedboat traveling at a constant velocity of 20 m/s passes a police boat at rest. The police boat decides that this is much too fast and starts his boat 8 seconds
after the speedboat passes. The police boat accelerates at 2.3 m/s2 for 10 s, then
travels at a constant velocity. When and where does the cop catch the speedboat?

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).