Text, 13.34. "Butane (C4H10) burns with (dry) air, giving products having the dry molal analysis 11% CO2, 1.0% CO, 3.5% O2, 84.5% N2. Determine (a) the percent of theoretical air. (b) the dew point of the combustion products in C, at 1 bar." Omit discussion.

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?