The mean temperature in the layer between 750 and 500 hpa decreases eastward by 3° c per 100 km. if the 750-hpa geostrophic wind is from the southeast at 20 m s-1, what is the geostrophic wind speed and direction at 500 hpa? let f 10-4 s-1

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.