Air at a pressure of 2 bar, a temperature of 52oc and a mass flow rate of 0.45 kg/s enters an insulated duct having different inlet and exit diameters. the diameter of the duct exit is 5 cm, the exit velocity is 225 m/s, and the pressure at the exit is atmospheric. (5a). (4p) determine the temperature of the air at the exit. (5b). (6p) determine the rate of entropy generation within the duct.

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

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

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?