A body explodes and splits into three pieces, the first piece has mass of 1.25kg and velocity of [ 30 -10 ]m/s, the second piece has main of 3.25kg and velocity of [ -17 10 ]m/s the third piece has velocity of [ 35.5 40 ]m/s. What is the mass of the third piece. What was the total mass of the body before the explosion.

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)