A wad of clay of mass m1 = 0.51 kg with an initial horizontal velocity v1 = 1.97 m/s hits and adheres to the massless rigid bar which supports the body of mass m2 = 1.37 kg, which can be assumed to be a particle. The pendulum assembly is freely pivoted at O and is initially stationary. The distance L = 1.01 m. Determine the angular velocity ω of the combined body just after impact. Why is linear momentum of the system not conserved?

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).