6m
a block weighing 400 kg rests on a horizontal surface and supports on top of it,
another block of weight 100 kg as shown the block w, is attached to a vertical wall
by a string 6 m long. find the magnitude of the horizontal force p applied to the
lower block as shown in figure that shall be necessary so that slipping of w, occurs.
smow:
90'

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)