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A cross section of a rotating bearing is shown. The spherical member rotates with angular speed omega, a small distance, a , above a plane surface. The narrow gap is filled with viscous oil having mu = 1250 cp. Obtain an algebraic expression for the shear stress acting on the spherical member. Evaluate the maximum shear stress that acts on the spherical member for the conditions shown. (Is the maximum necessarily located at the maximum radius?) Develop an algebraic expression (in the form of an integral) for the total viscous shear torque that acts on the spherical member. Calculate the torque using the dimensions shown. (omega=70rpm, R=75mm, a=0.5mm, R0=20mm
Given a simulator or actual device, identify if a control loop is in control or out of control and identify the information used to make the decision
Determine the flow rate of steam from the boiler in lb/h
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
Use thin airfoil theory to show that the pressure coefficient across the length of the ellipse in the stream-wise direction is constant when it is assumed T
a building has a peak heating load equal to 18.3 kw and a peak cooling load of 23.8 kw. estimate the seasonal heating
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The heating is to be done in a mixing tank by direct injection of the steam, all of which condenses. Determine the two inlet mass flows needed to meet the desired hot water flow rate.
a helicopter is ascending vertically with a speed of 5.78. at a height of 121 above the earth a package is dropped
steam in a piston-cylinder assembly undergoes a polytropic process with n2 from an initial state where p 500 psia and
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