Agasoline engine operating on an ideal otto cycle has a compression ratio of 11. air enters the engine at 100 kpa, 37 c. the maximum temperature during the cycle is 1700 k·treat the working fluid as air and use variable specific heats , determine: (a) the amount of heat transfer per unit mass of the working fluid during the heat addition process (b) the thermal efficiency of the engine, (c) the mean effective pressure for this cycle. (d) show this cycle on p-v and t-s diagrams.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?