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A 25-mm-diameter shaft is pulled through a cylindrical bearing as shown in Fig. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic viscosity of 8.0 ×10-4 m2/s and a specific gravity of 0.91. Determine the force F required to pull the shaft at a velocity of 3 m/s. Assume the velocity distribution in the gap is linear.
refrigerant 22 vapor enters the compressor of a refrigeration system at an absolute pressure of 20 lbfin.2. a pressure
an electric generator provides 500 kw and is powered by a diesel engine with a compression ratio of 19 and a cutoff
the yield of a chamical process is being studied. from previous experience with disprocess the standart deviation of
a 90 percent efficient turbine accepts water at 400 kpa in a 16 cm diameter pipe. what is the maximum power output if
find the specific volume of steam in m3kg at 2.5 mpa and 283 degrees c. what is the value predicted by the ideal gas
a trailer truck enters a 2 percent uphill grade traveling at 72 kmh and reaches a speed of 108 kmh in 300 m. the cab
two oils are tested to establish their viscosity index. oil a and oil b have their viscosity measured at temperatures
an engineer is designing a system that requires transporting .01 m3s of helium at 15degc and 120 kpa. the velocity of
0.25 kg of red-hot 700 c coals are taken from the fireplace and left in the middle of a room. the room is 3 m x 4 m x
A Carnot heat engine operates between 40C and 320 C. What is the thermal efficiency? if the work output is 200 kJ/kg, what is the quality of state A (in 320C)?
air at 30 degree c 80 rh is cooled by spraying water at 12degreec. this causes saturation followed by condensation the
A vapor compression refrigeration cycle is used. The working fluid is R134a. The fluid at the compressor inlet is a superheated vapor with a pressure p1 = 200 Kpa and a temperature T1 = 10°C. The compressor pressure ratio p2/p1 = 8, the fluid exits..
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