A frustum-shaped body is rotating at a constant angular speed of 200 rad/s in a container...

A frustum-shaped body is rotating at a constant angular speed of 200 rad/s in a container filled with SAE 10W oil at 20°C (μ = 0.1 Pa • s), as shown in Fig. P9-31. If the thickness of the oil film on all sides is 1.2 mm, determine the power required to maintain this motion. Also the determine reduction in the required power input when the oil the reduction in the required power input when the oil temperature rises to 80°C(μ = 0.0078 Pa • s)