An automobile having a mass of 884 kg initially moves along a level highway at 68 km/h relative to the highway. it then climbs a hill whose crest is 69 m above the level highway and parks at a rest area located there. for the automobile, determine its changes in kinetic energy, in kj

The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40°c and an evaporating temperature of -4°c shows a refrigeration capacity of 115 kw. at this operating point, the motor (its efficiency is 90 percent) draws 34.5 kw. the bore of the cylinders is 87 mm and the piston stroke is 70 mm. the performance data are based on 8°c of sub-cooling of the liquid leaving the condenser. compute (a) the actual volumetric efficiency and (b) the compression efficiency.