Which of the following is true for the diplacement a) it cannot be zero b) its mangitude is greator than the distance travelled by the object

If the speed of a particle triples ,by what factor does its kinetic energy increase?

What object a collides with object b and bounces back its final momentum is?

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)