An aircraft has a jet engine mounted on a pylon. the flight velocity is u1= 300m/s. the fully expanded velocity of the jet exhaust is uj= 800m/s. the mass flow rate through the engine is 10 kg/s (neglecting the combustion products). the static pressure at the nozzle exit is 80 kpa. the static pressure at the inlet is 20 kpa. an ambient pressure is measured as p1= 20kpa. the nozzle exit area is 4.0 m^2. determine the thrust via reynolds transport theory.

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.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.