Air enters a nozzle (with initial 1 m² area) at 500 kpa, 420 k and v = 110 m/s. the nozzle area decreases until the flow becomes critical (ma = 1). assume the flow is isentropic and steady, determine a. the mass flowrate of the air b. the pressure and temperature of the air when it passes through the critical portion of the nozzle c. the area of the critical portion of the nozzle

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.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false