Which shows a decrease in fluid pressure? a. a fan is turned from high speed to low speed. b. oxygen is compressed as it is put into a pressurized tank. c. water in a creek slows down as it enters a slow-moving river. d. a river speeds up when it moves into a narrower channel.

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.