How can you use the principle of uniformitarianism to figure out how a lava rock formed?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Which accounts for an increase in the temperature of a gas that is kept a constant volume

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).