Problem 10.037 si air enters the compressor of an ideal brayton refrigeration cycle at 100 kpa, 270 k. the compressor pressure ratio is 3.75, and the temperature at the turbine inlet is 350 k. determine: (a) the net work input, per unit mass of air flow, in kj/kg. (b) the refrigeration capacity, per unit mass of air flow, in kj/kg. (c) the coefficient of performance. (d) the coefficient of performance of a carnot refrigeration cycle operating between thermal reservoirs at tc

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

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.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?