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At the beginning of the compression process of an air-standard Otto cycle, P1 = 14.7 lb/in2 and T1 = 530°R. The maximum cycle temperature is 3000°R. Determine the thermal efficiency and mean effective pressure in lb/in2 for compression ratios of 6, 7, 8, 9 and 10.
A refrigerator with a COP of 3 removes 1.5 kW from the cold space at -9 °C while rejecting heat to the kitchen at 22 °C.
the ice cap at the north pole may be 1000 m think with a density of 920 kgm3. find the pressure at the bottom and the
the volume of a hemispherical storage tank as a function of its height is given by vt pirh2t - pi3h3t where r is the
1 a bar of steel 3 in 76.2mm in diameter is to be machined at 90 fpm 0.5 msec. what spindle speed should be
determine the entropy generated for carbon dioxide in a pistoncylinder with an initial volume of 200 l at 300 degrees c
the material hoist and the load have a total mass of 900 kg and the counterweight c has a mass of 150 kg. at a given
The heat offusion of aluminum is 3.97 10^5 J/kg; the heat of fusion of mercury is 1.18 10^4. What is the effeciency of this engine?
the pump is delivering hydraulic oil with a specific gravity of 0.85 at a rate of 20 gallons per minute. the pressure
consider a piston-cylinder system containing 0.1 kg of water. initially the volume of the system is 0.0125m3 while the
the rigid gate oab shown in the figure below is hinged at o and rests against a rigid support at b. what minimum
refrigerant 22 is used in the evaporator pipe of a commercial refrigeration unit. at steady state it flows at a rate of
a nozzle is attached to a horizontal pipe and discharges water into the atmosphere as shown in the figure. the inflow
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