A convergent nozzle has an exit area of 1 in. Air enters the nozte with a stagnation pressure of 100 lbfjin2 and a stagnation temperat of 200 F. Determine the mass rate of flow for back presures of 30 1eljin 52.8 lbf/in.2, and 30 lbfin?

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?