3kw oven supplied with 9kj of energy. how many seconds can it run for?

Convection currents are caused by differences in what two things?

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).

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created