Earth moves in an elliptical orbit with the sun at one of the foci. the length of half of the major axis is 149,598,000 kilometers, and the eccentricity is 0.0167. find the minimum distance (perihelion) and the maximum distance (aphelion) of earth from the sun.

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.