Acertain perfect gas is compressed reversibly from 1 bar, 17 °c to a pressure of 5 bar in a perfectly thermally insulated cylinder, the final temperature being 77 °c. the work done on the gas during the compression is 45 kj/kg. calculate γ, cv, r, and the molar mass of the gas.

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.