1.) Henry poured hot chocolate into a mug. Select why the outside of the mug started to feel warm.

A the energy from the hot chocolate mixed with the energy from the mug B. the mug lost energy due to the hot chocolate C. the energy from the hot chocolate flowed to the cold mug D. the mug was a poor conduct of heat

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

The two required components for a generator

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).