Air enters a nozzle at 4 bar, 550 k, and 60 m/s and exits at 0.75 bar. assuming ideal gas behavior, variable specific heats and a reversible and adiabatic process, determine the exit temperature of the air.

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.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?