Athick steel sheet of area 150 in.2 is exposed to air near the ocean. after a one-year period it was found to experience a weight loss of 485 g due to corrosion. to what rate of corrosion, in (a) mpy and (b) mm/yr, does this correspond? the density of steel is 7.9 g/cm3.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.