Abearing uses sae 30 oil with a viscosity of 0.1 n·s/m2. the bearing is 30 mm in diameter, and the gap between the shaft and the casing is 2.0 mm. the bearing has a length of 3 cm. the shaft turns at ω = 350 rad/s. assuming that the flow between the shaft and the casing is a couette flow, find the torque required to turn the bearing.