Engineering, 11.07.2019 01:10 billy1123
Apiston-cylinder device contains 0.1 kg of hydrogen gas (pg model: cv=10.18, k = 1.4, r= 4.12 kj/kg-k) at 1000 kpa and 300 k. the gas undergoes an expansion process and the final conditions are 500 kpa, 270 k. if 10 kj of heat is transferred into the gas from the surroundings at 300 k, determine (a) the boundary work (wb), and (b) the entropy generated (sgen) during the process
Answers: 2
Engineering, 03.07.2019 14:10
Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
Answers: 2
Engineering, 03.07.2019 15:10
If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
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Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 19:10
The proportional limit is always greater than the yield strength for a material. a)-trune b)- false
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Apiston-cylinder device contains 0.1 kg of hydrogen gas (pg model: cv=10.18, k = 1.4, r= 4.12 kj/kg...
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