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A 5-cm-diameter shaft rotates at 4500 rpm in a 15-cmlong, 8-cm-outer-diameter cast iron bearing (k 70 W/m K) with a uniform clearance of 0.6 mm filled with lubricating oil ( 0.03 N s/m2 and k 0.14 W/m K). The bearing is cooled externally by a liquid, and its outer surface is maintained at 40°C. Disregarding heat conduction through the shaft and assuming one-dimensional heat transfer, determine (a) the rate of heat transfer to the coolant, (b) the surface temperature of the shaft, and (c) the mechanical power wasted by the viscous dissipation in oil.
determine the tower height required to remove 90 of co2 from air by water in a dilute solution in a packed tower with a
Refrigerant 22 enters an insulated compressor operating at steady state as saturated vapor at - 16oC with a mass flow rate of 1.5 kg/s. Refrigerant exits at 7 bar, 70oC. Changes in KE and PE from inlet to exit can be ignored.
a cold storage room has walls made of 0.23 m of brick on the outside 0.08 m of plastic foam and finally 1.5 cm of wood
air from a compressor discharges at a constant rate through a converging-diverging nozzle to the ambient. the inlet
what is the indentation diagonal length when a load of 0.75 kg produces a vickers hv of 510? calculate the vickers
determine the change in the specific internal energy of solid aluminum as it is heated at atmospheric pressure from 300
to improve the efficiency of a steam boiler system which generates 600 psia steam for refinery process use the boiler
The parting line in injection molding is which one of the following: (a) the lines formed where polymer melt meets after flowing around a core in the mold, (b) the narrow gate sections where the parts are separated from the runner, (c) where the clam..
1045 steel is carburized at 650 degree c for 500 hr. the carbon concentration is 0.6 wt at a position of 3.7 mm beneath
the diameter of a cast-iron pipe is 12.5 in and the reyolnds number for the flow of water through the pipe is estimated
design a 1d compressed air rocket engine. assume standard atm conditions and isentropic flow. k1.4 r0.287determine1.
An orifice meter is used to measure the volume flow rate in a pipe. It takes 12 readings (in m3/s): 0.0182, 0.0188, 0.0179, 0.0183, 0.0182, 0.0176, 0.0191, 0.0185, 0.0184, 0.0180, 0.0178, and 0.0186. The true volume flow rate is 0.017920 m3/s. Estima..
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