At the beginning of compression in an air-standard diesel cycle, p1 = 770 kpa, v1 = 0.016 m3, and t1 = 315 k. the compression ratio is 15 and the maximum cycle temperature is 1400 k. determine (a) the mass of air, in kg. (b) the heat addition and heat rejection per cycle, each in kj. (c) the net work, in kj, and the thermal efficiency.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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.