Consider the two repeated vector products À Ý (XČ) and (Ả XB) Č. Give an example that illustrates the general
rule that these two vector products do not have the same magnitude or direction. Can you choose the vectors A, B, and Č such that
these two vector products are equal? If so, give an example.​

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.