In one of the experiments, the trolley of mass 0,2 kg is on a frictionless horizontal table. The trolley is joined to a hanging masspiece of mass 0,05 kg. The trolley and
the masspiece are joined together with an inelastic string of negligible mass and
runs over a frictionless pulley,
0,2 kg
0,05 kg​

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)