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Select a diameter of a steel driveshaft that transmits 250 hp at 5000 rpm. Bending and axial loads are negligible.
(a) What is the nominal shear stress at the surface?
(b) If a hollow shaft of inside diameter 0.9 times outside diameter is used, what outside diameter would be required to give the same outer surface stress?
(c) How do the weights of the solid and hollow shafts compare?
The engine of the van produces a constant driving traction force F at the wheels as it ascends the slope at a constant velocity v, determine the magnitude of the acceleration of the van,in m/s^2 .when it passes point A and begins to travel on a level..
The surface of the shaft fillet has been shot-peened, which is estimated to be equivalent to a laboratory mirror-polished surface. Fatigue stress concentration factors for the fillet have been determined and are shown on the drawing. Estimate the ..
a mass of 2.4 kg of air at 150 kpa absolute and 12 degrees celsius is contained in gas tight frictionless piston
Show that even and odd output samples are independent and can be deinterleaved and demodulated separately.
a carnot engine produces 30 hp while operating with an efficiency of 32. if the engin rejects heat to the atmosphere at
1. An inventor claims to have devised a refrigeration cycle operating between hot and cold reservoirs at 300 K and 250 K, respectively, that removes an amount of energy QC by heat transfer from the cold reservoir that is a multiple of the net work ..
A piston cylinder device contains .733 kg of refrigerant-134a at -10 degrees C. The piston that is free to move has a mass of 8.63 kg and a diameter of 21.2 cm. The local atmospheric pessure is 88 kPa. Now, heat is transferred to the refridgerant-134..
12. 3 kg of refrigerant 22 undergoes a process for which the pressure-specific volume relation is pv^-0.8 = constant. The initial state of the refrigerant is 12 bar and 60 degrees C. The final pressure is 8 bar. Kinetic and potential energy effects a..
Assume the water to be at a pressure of 20 atm. And also find the change in value of heat transfer coefficient
A hollow shaft is produced by boring a 150-mm-diameter concentric core in a 225-mm-diameter solid circular shaft. Compute the percentage of the torsional strength lost.
Find the coefficients of moisture expansion of a glass/epoxy lamina with 40% fiber volume fraction. Use the properties of glass and epoxy from Table 3.1 and Table 3.2, respectively.
a square-shaped board 1 m 1 m with weight of 16 n slides down a 30 o - inclined ramp with a terminal velocity of 22.5
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