Engineering, 10.04.2020 20:15 Woodsydal2390
Five kg of nitrogen (N2) undergoes a process from p1 = 5 bar, T1 = 400 K to p2 = 2 bar, T2 = 750 K. Assuming ideal gas behavior, determine the change in entropy, in kJ/K, with: (a) constant specific heats evaluated at 450 K. (b) variable specific heats.
Answers: 3
Another question on Engineering
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10
Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.
Answers: 1
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
Answers: 2
Engineering, 04.07.2019 19:20
Acircular pipe of 30mm outside diameter is placed in an airstream at 30 c and latm pressure. the air moves in cross flow over the pipe at 20 m/s, while the outer surface of the pipe is maintained at 110 c. what is the drag force exerted on the pipe per unit length? what is the rate of heat transfer from the pipe per unit length?
Answers: 1
You know the right answer?
Five kg of nitrogen (N2) undergoes a process from p1 = 5 bar, T1 = 400 K to p2 = 2 bar, T2 = 750 K....
Questions
Biology, 07.04.2020 04:19
Mathematics, 07.04.2020 04:19
Mathematics, 07.04.2020 04:19
Mathematics, 07.04.2020 04:19
Mathematics, 07.04.2020 04:20
Mathematics, 07.04.2020 04:20
Health, 07.04.2020 04:20
