A stone is thrown horizontally at a speed of 10.0 m/s from the top of a cliff 139.4 m high. a) How long does it take the stone to reach the bottom of the cliff?
b) How far from the base of the cliff does the stone strike the ground?
c) What is the vertical velocity of the stone when it strikes the ground?

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.