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Nitrogen is compressed in a polytropic process with n = 1.2 from 120 kPa and 10oC to 800 kPa in a piston-cylinder device. Determine the work produced and heat transferred during this compression process, in kJ/kg.
A household refrigerator with a coefficient of performance of 2.4 removes energy from the refrigerated space at a rate of 600 Btu/h. Evaluating electricity at , determine the cost of electricity n a month when the refrigerator operates for 360 hou..
a thermopane window consists of two pieces of glass k 0.78 wmk 7 mm thick that enclose an air space k 0.026 wmk 7 mm
what does it mean when a steel cable is required to have a factor of safety of at least 5 against its ultimate load?
1.consider a room 3 m x 3m x 3m with one faccedilade made of glazing with diffuse transmittance 0.6 and reflectance
What is the nozzle-exit-to-throat area ratio for case (a)? The gross thrust is the contribution to engine thrust made by the exhaust nozzle only.
a moving particle encounters an external electric field that decreases its kinetic energy from 8830 ev to 7750 ev as
For a normal distribution, find the z score values that separate
a total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 138 g of water. the reaction
the hull of a boat has a volume of 150 m3 and the total mass of the boat when empty is 8560 kg. determine how much load
a refrigeration remove 12 kj of heat from a body when working between 24 k and 310 k if the coefficient of performance
a hot water leak in one of the facets of your apartment can be very wasteful. a continuous leak of one quart per hour a
A rigid tank contains water vapor at 200 degrees celcius and unknown pressure. When the tank is cooled to 150 degrees celcius, the vapor starts condensing. Estimate the initial pressure in the tank.
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