Air is heated from 50 f to 200 f in a rigid container with a heat transfer of 500 btu. assume that the air behaves as an ideal gas. determine the volume of air [ft3] if the initial pressure is 2 atm. also show the process on a p-v state diagram. use the following temperature conversion: t[r] = t[f] + 460.

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?