Two small charged objects are located on the y-axis. One is at y = 1.00 m, the other is at y = −1.00 m, and they both have a charge of q = +1.60 µC. (a) Determine the electric potential (in kV) on the x-axis at x = 0.600 m.

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).