A particle undergoes two displacements. The first has a magnitude of 150 cm and makes an angle of 120° with
the positive x axis. The resultant displacement has a magnitude
of 140 cm and is directed at an angle of 35.0° to
the positive x axis. Find the magnitude and direction of
the second displacement.

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.