Question: The space between two 0.15 m long concentric cylinders is filled with glycerin which has a viscosity of 0.95 Pa s. The inner cylinder has

The space between two 0.15 m long concentric cylinders is filled with glycerin which has a viscosity of 0.95 Pa s. The inner cylinder has a radius of 7.5 cm and the gap width between the cylinders is 2.5 mm. The outer cylinder is fixed. Assume that the velocity distribution in the gap is linear. Determine the torque and the power required to rotate the inner cylinder at 180 rpm.

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