A ball of mass 0.616 kg moving east (+x direction) with a speed of 3.90 m/s collides head-on with a 0.308 kg ball at rest. Assume that the collision is perfectly elastic. What is the speed of the .616kg ball after the collision? What is the .308kg ball after the collision?

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)

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency

Which is an advantage of subdividing science into different areas?