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.

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

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.