A hollow circular nylon pipe supports a load pa=7800N which is uniformly around a cap plate at the top of the lower pipe. a second load PB is applied at the bottom. Neglect the self-weight of the pipes. Find the PB so that the tensile stress in upper part is 14.5 MPa .what is the resulting stress in the lower part?

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

Acompressor receives the shaft work to decrease the pressure of the fluid. 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?