Engineering, 11.09.2019 03:20 xonyemaa12
Air is contained in a vertical piston–cylinder assembly such that the piston is in static equilibrium. the atmosphere exerts a pressure of 101 kpa on top of the 0.5-m-diameter piston. the gage pressure of the air inside the cylinder is 1.2 kpa. the local acceleration of gravity is g = 9.81 m/s2 . subsequently, a weight is placed on top of the piston causing the piston to fall until reaching a new static equilibrium position. at this position, the gage pressure of the air inside the cylinder is 2.8 kpa. determine (a) the mass of the piston, in kg, and (b) the mass of the added weight, in kg
Answers: 3
Engineering, 04.07.2019 18:10
The higher the astm grain size number, the finer the gran is. a)-true b)-false
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Engineering, 04.07.2019 18:20
Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis
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Engineering, 04.07.2019 19:20
Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection
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Engineering, 04.07.2019 19:20
Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?
Answers: 3
Air is contained in a vertical piston–cylinder assembly such that the piston is in static equilibriu...
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