Air inside a piston-cylinder system is compressed from an initial pressure of 100 kpa and an initial specific volume of 2.5 m/kg to a final state during which the temperature remains constant. if the heat loss during this process is 50 kj/kg, calculate (a) the final pressure in [kpa] and (b) the final density in [kg/m ] of the air in the cylinder.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.