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A 25-mm diamenter shaft is pulled through a cylindrical bearing as shown. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic velocity of 8.0x10^-4 m^2/s and a specific gravity of 0.91. Determine the force P required to pull the shaft at a velocity of 3 m/s. Assume the velocity distribution in the gap is linear.
Note: picture not shown but length is 0.5m. This is also question 1.38 in the 4th edition-The one that is poping up is not the right one.
Determine the maximum shearing stress and any coexisting normalstress on the element and show these on a correctly orientedelement.
rom a photograph one observes that on a level section of highway 10% of the vehicles are trucks, 90% are cars, and that there are 50 vehicles per mile of highway. The trucks travel at 40 mph, and the cars at 50 mph.
A permanent endowment at the University of Alabama is to award scholarships to engineering students. The awards are to be made beginning 5 years after the $10 million lump-sum donation is made
Estimate the amount of depression storage (inches and cubic feet) in a 6-arce parking lot using the following rainfall and discharge data. The discharge data were measured at the only outlet in the parking lot.
Helium enters an adiabatic steady-state nozzle at 200kPa and 124 degrees Celsius and 10m/s. At the nozzle exit the temperature of the helium is 100 degrees Celsius and the pressure = 150 kPa.
Assuming the mass of the whip is uniformly distributed along its length, calculate the velocity of the end of the whip as a function of the position of the loop (x), and calculate the position of the loop as the end of the whip breaks the speed of so..
A business wishes to discharge salt into a river. the concentration of salt from the business is 210 mg/L. the flow of water in the river (upstream) is 0.5 m^3/s. Upstram the concentration of salt in the river 15 mg/L.
A 10 X 106 m3 lake is fed by a polluted stream having a flow rate of 5 m3/s and a pollutant concentration of 10 mg/L. There is also a sewage outfall that discharges 0.5 m3/s of wastewater having a pollutant concentration of 100 mg/L. The stream and s..
A worker slowly moves a 50-kg crate to the left along a loading dock by applying a force P at corner B as shown. Knowing that the crate starts to tip at about the edge E of the loading dock when a= 200mm
A tubular aluminium bar (G=28GPa) of square cross section with outer dimensions 50mm x 50mm must resist a torque T=300Nm. Calculate the minimum required wall thickness t_min if allowbale shear stress is 20MPa
What are the effects of water pollution on the components of the hydrologic cycle?
The skateboard rider leaves the ramp at A with an initial Velocity Va at a 30 degree angle. If he strikes the ground at B, determine Va and the time of the flight. x=5.1m
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