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Determine the mean effective pressure (in psia) of an ideal Otto cycle that uses air as the working fluid; its state at the beginning of the compression is 12.9 psia and 65oF; its temperature at the end of the combustion is 1,545oF; and its compression ratio is 8.9. Use constant specific heats at room temperature.
initially an insulated rigid tank contains 18.67 kg of water at 21.45oc and 101 kpa. the tank also contains a 3.66 kg
a subway car leaves station a it gains speed at the rate of 2 ms2 for 6 seconds and then at the rate of 3 ms2 until it
steam having a mass of 3kg and initially at 2.5mpa and 350degc has 2460kj of heat removed at constant temperature until
a belt driven machine has a moment of inertia 240 ft-lb-sec2. the belt tensions differ by 80 lb as the belt passes over
Lift coefficient (Cl) and lift (L), An airfoil of surface area 1ft squared is tested for lift (L) in a wind tunnel. At an angle of attack of 5 degrees with standard air of density 0.0024 slugs/ft cube at a speed of 100 ft/sec
assume steady-state one dimensional heat conduction through the symmetric shape shown. assuming that there is no
a 40kn axial load is applied to a short wooden post that is supported by a concrete footing resting on undisturbed
a steady flow steady state air compressor handles 4000 ft3min measured at the intake state of 14.1 psia 30.0degf and a
some engineers have suggested that air compressed into tanks can be used to propel personal transportation vehicles.
a 630000 gallon tank sits empty outside where the temperature is 20 degrees f. the tank is then immediately filled
a thermometer is initially at a temperature of 70degf and is suddenly placed in a liquid which is maintained at
estimate the convective heat-transfer coefficient for natural convection from a horizontal steam pipe. the outside
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