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An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95kPa and 27°C. 750kJ/kg of heat is transferred to air during the constant volume heat addition process. Taking into account the variation of specific heats with temperature (air-standard analysis), determine
i. The pressure and the temperature at the end of the heat addition processii. The net work outputiii. The thermal efficiencyiv. The mean effective pressure for the cycle
an aluminum pan whose thermal conductivity is 237 has a flat bottom whose diameter
assuming a transition reynolds number of 5 x 105 determine the distance from the leading edge of a flat plate at which
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
Convert the composition of the following alloy from atom percent to weight percent (a) 44.8 at% of silver, (b) 46.3 at% of gold, and (c) 8.9 at% of Cu. Assume that the atomic weights for silver, gold and copper are, respectively, 107.87, 196.97 an..
a piston cylinder device contains 0.3kg of r134-a initially at 0 c and 400 kpa. the cylinder is then heated until the
calculate the average distance moved in one day by smoke particles in air for the following cases a smoke diffuses in
Fireclay brick of dimensions 0.06 m x 0.09 m x 0.20 m is removed from a kiln at 1600 K and cooled in air at 40oC with h=50 W/m2/K. What is the temperature at the center and at the corners of the brick after 50 minutes of cooling?
imagine a thin cylinder of initial internal diameter do initial wall thickness to and initial fixed length fixed by two
a 1 meter section of 1040 steel square tubing is loaded in tesnion. the tubing has an outer edge length of 10mm and a
air enters a compressor at 179 kpa and 290 k and exits at a temperature of 500.9 k. determine the power kw for the
the l12 of a bearing is the life of the bearing at which 15 failures may be expected. a new bearing design follows a
a shaft is to be designed to support the spur pinion and helical gear shown in the figure on two bearings spaced 700 mm
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