subject
Engineering, 17.10.2020 20:01 kylaprather06

Silicon carbide nanowires of diameter D = 15 nm can be grown onto a solid silicon carbide surface by carefully depositing droplets of catalyst liquid onto a flat silicon carbide substrate. Silicon carbide nanowires grow upward from the deposited drops, and if the drops are deposited in a pattern, an array of nanowire fins can be grown, forming a silicon carbide nano-heat sink. Consider finned and un finned electronics packages in which an extremely small 10μm X 10μm electronics device is sandwiched between two d = 100 nm thick silicon carbide sheets. In both cases, the coolant is a dielectric liquid at 20°C. A heat transfer coefficient of h = 1 X 105 W/m2 ∙ K exists on the top and bottom of the un-finned package and on all surfaces of the exposed silicon carbide fins, which are each L = 300 nm long. Each nano-heat sink includes a 200 X 200 array of nano-fins. Determine the maximum allowable heat rate that can be generated by the electronic device so that its temperature is maintained at T.

ansver
Answers: 2

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.
Answers: 3
question
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
question
Engineering, 04.07.2019 18:20
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
question
Engineering, 04.07.2019 19:10
The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object
Answers: 1
You know the right answer?
Silicon carbide nanowires of diameter D = 15 nm can be grown onto a solid silicon carbide surface by...
Questions
question
Mathematics, 20.01.2021 20:20
question
Arts, 20.01.2021 20:20
question
Mathematics, 20.01.2021 20:20
question
Social Studies, 20.01.2021 20:20
question
Mathematics, 20.01.2021 20:20
question
Mathematics, 20.01.2021 20:20
Questions on the website: 13722363