Determine the resistance and the power Consumpten of a resistor that must be placed in series with a 75 ohms resistor
Accross 120 volts Source in Order to limit the Power Consumption
h the 75 ohms resistor to 90 watts.​

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)