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A circular shaft of diameter D rotates at a speed N and is supported by a journey bearing with clearance C. the viscosity of the lubricant is m and the bearing pressure is P. Obtain an expression for the friction coefficient f, defined by the ratio frictional force/bearing load, in terms of m,N,D and C.
1. a commercial refrigerator keeps food fresh at -12 ordmc. it is estimated that the refrigerator removes 3300 kjhr
a robotic rover on mars finds a spherical rock with a diameter of 10 centimeters. the rover picks up the rock and lifts
a useful figure of merit comparison between batteries that have the same voltage is the ampere-hour ah rating. for
water is flowing horizontally through 100 feet of 2 inch pipe then into a sudden expansion to 3 inch pipe for 50 more
A huge reservoir of air supplies a converging-diverging nozzle with throat and exit areas of 10 cm^2 and 25 cm^2 respectively. The reservoir pressure and temperature are 150 kPa and 20C. Determine the range of back pressure over which
However, even when the cylinder is pressurized, the torque T is still sufficient to keep the seam closed so that no water leaks out. Determine the angle theta degrees that requires the minimum torque T to keep the seam closed. (Hint: use Mohr's ci..
a 4 diameter pipe elevates water vertically 100 feet. if the flow rate is 10 gpm a what is the velocity at the bottom
this is another safety-related problem. it is concerned with the leakage of a gas from a high pressure storage tank. a
an electric motor operating at steady state draws a current of 10amps with a voltage of 220v. the output shaft power
at the beginning of the compression process of an air-standard diesel cycle operating with the compression ratio r 18
a cylindrical nuclear fuel rod of 1 cm in diameter is encased in a concentric tube of 2 cm in diameter where cooling
an inventor claims to have devised a refrigeration cycle that at steady state requires a net power of .8 hp to remove
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