An alternating current is supplied to an electronic component with a warning that the voltage across it should never exceed 12 volt. What is the highest rms voltage that can be supplied to this component while staying below the voltage limit in the warning? a. 6
b. 6√ 2
c. 144
d. 12√ 2

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.