Will a pair of parallel current-carrying wires exert forces on each other? 1. yes; the wires are electrically charged. 2. no; the magnetic field generated by the currents of the wires does not affect the wires themselves. 3. yes; the magnetic field generated by the current in one wire is perpendicular to the current in the other wire and vise versa. 4. no; the two wires attract each other by

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).