Echnician A says that most horn circuits use a relay and the current through the relay coil is controlled by the horn switch or body control module. Technician B says that most windshield wipers use a two-brush, three-speed motor. Who is right?

Can anybody me with this? ? (picture included.)

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).

In which of these cases are the two wave points considered to be in phase with each other?