5.43 a refrigeration cycle operating between two reservoirs receives energy qc from a cold reservoir at tc 5 275 k and rejects energy qh to a hot reservoir at th 5 315 k. for each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible: (a) qc 5 1000 kj, wcycle 5 80 kj. (b) qc 5 1200 kj, qh 5 2000 kj. (c) qh 5 1575 kj, wcycle 5 200 kj. (d) ␤ 5 6.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?