Engineering, 05.11.2019 22:31 KarrieShea42
A10 cm x 10 cm circuit board dissipating 10 w of power uniformly is cooled by air, which approaches the circuit board at 15°c with a velocity of 4 m/s. disregarding any heat transfer from the back surface of the board, determine the surface temperature of the electronic components at the end of the board. determine the surface temperature of the electronic components (a) at the leading edge and (b) at the end of the board. assume the flow to be turbulent since the electronic components are expected to act as turbulators. assume a film temperature of 27°c.
Answers: 3
Engineering, 04.07.2019 18:10
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
Answers: 2
Engineering, 04.07.2019 18:10
The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length
Answers: 2
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
A10 cm x 10 cm circuit board dissipating 10 w of power uniformly is cooled by air, which approaches...
Social Studies, 18.02.2021 20:30
Social Studies, 18.02.2021 20:30
Mathematics, 18.02.2021 20:30
Mathematics, 18.02.2021 20:30
Health, 18.02.2021 20:30
Mathematics, 18.02.2021 20:30
Chemistry, 18.02.2021 20:30
Social Studies, 18.02.2021 20:30
Biology, 18.02.2021 20:30
Mathematics, 18.02.2021 20:30
Mathematics, 18.02.2021 20:30