Help!! I really don't know how to resolve it Two identical small electrified balls are not repelled. After being brought into contact and fixed at a distance of 1.25 times greater, their intersecting force did not change. What was the load, the first ball, if the second had a load equal to 1μC? The answer should be: 4μC; 0.25μC;

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.