An air-standard dual cycle has a compression ratio of 9. at the beginning of compression, p, 100 kpa, t, 300 k, and v 14 l. the heat addition is 22.7 kj, with one half added at constant volume and one half added at constant pressure. determine (a) the temperatures at the end of each heat addition process, in k. (b) the net work of the cycle per unit mass of air, in kj/kg. (c) the thermal efficiency. (d) the mean effective pressure, in kpa

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

there are no contact forces mentioned on the list of choices that you've provided.