Starting at a certain speed, a bicyclist travels 200m. suppose the bicyclist undergoes a constant acceleration of 1.20m/s squared. if the final speed is 25.0m/s, what was the bicyclists initial 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).