Engineering, 14.02.2020 03:43 tajonae04
Moran and Shapiro, Problem 3.23 and 3.39, modified. Two kg of Refrigerant 134a undergoes a polytropic process (p×Vn = constant) in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 C. Determine the work for the process. Also, determine the heat transfer that must occur, in kJ. Hint: You will have to determine the polytropic exponent n. Repeat your calculations if the final state is, instead, 12 bar and saturated vapor. The polytropic exponent n will be different, of course
Answers: 3
Engineering, 04.07.2019 18:10, nandalabella06
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
Answers: 2
Engineering, 04.07.2019 18:20, krojas015
Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?
Answers: 3
Engineering, 04.07.2019 19:10, rayne40
A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?
Answers: 3
Moran and Shapiro, Problem 3.23 and 3.39, modified. Two kg of Refrigerant 134a undergoes a polytropi...
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