A 5 kg object is moving downward at a velocity of 12 m/s and is currently 2.6 meters above the ground.

calculate its kinetic energy
calculate its potential energy
calculate its mechanical energy

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

What are the applications of electromagnetic waves

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).