Engineering, 26.07.2019 16:20 Angel1107
Which dimensionless number can describe the rela boundary layers? umber can describe the relative thickness of the velocity and thermal a. biot b. nusselt c. prandti d. reynolds
Answers: 3
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 -20ยฐc. air approaches the tube bank in the normal direction at 0ยฐc 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 -5ยฐc and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10
The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false
Answers: 1
Engineering, 04.07.2019 18:10
Burgers vector is generally parallel to the dislocation line. a)-true b)-false
Answers: 2
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
Which dimensionless number can describe the rela boundary layers? umber can describe the relative t...
Mathematics, 26.07.2019 10:00
Physics, 26.07.2019 10:00
Biology, 26.07.2019 10:00
History, 26.07.2019 10:00
History, 26.07.2019 10:00
Geography, 26.07.2019 10:00
Mathematics, 26.07.2019 10:00
Biology, 26.07.2019 10:00
Mathematics, 26.07.2019 10:00
Biology, 26.07.2019 10:00