One and one-half pounds of water within a piston-cylinder assembly execute a carnot power cycle. during isothermal expansion, the water is heated at 500 degree f from saturated liquid to saturated vapor. the vapor then expands adiabatically to a temperature of 100 degree f and a quality of 70.38%. sketch the cycle on p-v coordinates. evaluate the heat transfer and work for each process, in btu. evaluate the thermal efficiency.

What precautions should you take to prevent injuries when dealing with heavy loads?

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false