Engineering, 05.10.2019 11:30 zafarm2oxgpmx
Apiston—cylinder device contains 6.95 kg of refrigerant-134a at 0.6 mpa and 700c. the refrigerant is now cooled at constant pressure until it exists as a liquid at 220c. if the surroundings are at 100 kpa and 250c, determine (a) the exergy of the refrigerant at the initial and the final states and (b) the exergy destroyed during this process.
Answers: 3
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.
Answers: 2
Engineering, 04.07.2019 18:10
True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure
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Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
Answers: 1
Apiston—cylinder device contains 6.95 kg of refrigerant-134a at 0.6 mpa and 700c. the refrigerant is...
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