Crude oil at 20°c fills the space between two concentric cylinders 250 mm high and with diameters of 150 mm and 156 mm. what torque is required to rotate the inner cylinder at 12 r/min, the outer cylinder rernaining stationary? assume that the viscosity of crude oil is 0.07 poise at 20°c.

Fluids at rest possess no flow energy. a)- true b)- false

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)