Which of these is an example of the conversion of kinetic energy into gravitational potential energy?a. a car engine moving the car forwardb. a bicyclist coasting down a long hillc. a thrown ball falling toward the ground after passing through the top part of its motionSelected:d. a roller coaster car moving toward the top of a rise in the tracks

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.