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LeAnn knows the speed of an airplane, but she wants to find the velocity. What does she need to determine to find velocity?
A.
The time it takes the airplane to move between two points.
B.
The acceleration needed to get to its speed
C.
The force of the airplane's engine
D
The direction the plane is flying

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.