Question: A 1 2 0 mm disc rotates on a table separated by an oil film of 1 . 8 mm thickness. Find the viscosity of

A 120 mm disc rotates on a table separated by an oil film of 1.8 mm thickness. Find the viscosity of oil if the torque required to rotate the disc at 60 r.p.m is 3.6\times 104 Nm. Assume the velocity gradient in the oil film to be linear.

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