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In a piston cylinder device, 5kg of Air at 200kPa and 227oC is compressed to 500kPa at 100oC. Determine the entropy change of the air. If during this process, there is only 200kJ transferred to the surrounding of 20oC, determine the entropy change of the surrounding. Will this process occur or not according to the second law of thermodynamics?
draw schematics of a heat engine and b refrigeration devices. label the reservoirs the type of energy transfer and the
boltzmanns constant is equal to 11.7 x 10-8 calcm2dk4. write a vba statement to assign the value of boltzmanns constant
a 31-l electric radiator containing heating oil is placed in a 48-m3 room. the room and the radiator oil are initially
explore the effects of compressor pressure ratio 2 to 20 in increments and mixture ratios helium and xenon between 0
air flows steadily through a constant-area duct. at section 1 the air is at 400 kpa abs 325k and 150 ms. as a result of
how much heat in kj must be added to 2 kg of steam initially at t1 300oc contained within a rigid volume to increase
air at -55 f 4 psia and m2.5 enters a constant area isentropic process and leaves the isentropic process at m0.2
consider a single sheet flat plate collector where the ambient temperature is 25c the insolation is 900 wm2 and
The boom OA carries a load P and is supported by two cables as shown. Knowing that the tension is 510 N in cable AB and 765 N in cable AC, determine the magnitude and direction of the resultant of the forces exerted at A by the two cables.
a four-cylinder engine with a 9.5-cm bore and an 8.75-cm stroke has a 7 clearance. the engine rotates at 2500 rpm. the
a refrigeration cycle is a reversed heat engine. which of the following has the maximum value of the co-efficient of
a truck travels on rails round a curve of 100m radius at a speed of 90kmh the truck has a total mass o 4ton and its
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