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mr Goodwill [35]
3 years ago
11

A square isothermal chip is of width w 5 mm on a side and is mounted in a substrate such that its side and back surfaces are wel

l insulated, while the front surface is exposed to the flow of a coolant at To 15°C. From reliability considerations, the chip temperature must not exceed T 85°C. Coolant T, h Chip If the coolant is air and the corresponding convection 200 W/m2 K, what is the maximum coefficient is h allowable chip power? If the coolant is a dielectric liq- uid for which h 3000 W/m2 K, what is the maxi- mum allowable power?

Engineering
1 answer:
Lynna [10]3 years ago
6 0

Answer:

a) 0.35 W

b) 5.25 W

Explanation:

Given that

Width of the chip, W = 5 mm

The environment temperature, T(∞) = 15° C

Surface temperature, T(s) = 85° C

The initial convection heat coefficient, h1 = 200 W/m².K

The final convection heat coefficient, h2 = 3000 W/m².K

See attachment for solution

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Technician A says that 18 gauge AWG wire can carry more current flow that 12 gauge AWG wire. Technician B says that metric wire
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Answer:

Technician B

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Both AWG and metric are sized by cross-sectional area.

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The ________________ attraction between the Earth and the moon is ______________ on the side of the Earth that happens to be ___
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Answer:

Gravitational; strongest; facing; closer; near side; toward.

Explanation:

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7 0
3 years ago
Are designed to make it easier for employees to get health and safety Information about
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3 years ago
Tahir travel twice as far as ahmed, but onley one third as fast. Ahmed starts travel on tuesday at noon at point x to point z 30
shepuryov [24]

Answer:

6:00 pm the next day

Explanation:

Given that

Tahir traveled twice as far as Ahmed. We say,

Ahmed traveled a distance, D

Tahir would travel a distan, 2D

Tahir traveled 1/3 as fast as Ahmed, so we say

Ahmed traveled at a speed, S

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If Ahmed starts travel on tuesday at noon at point x to point z 300km, by 9:00pm,

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Speed, S that Ahmed traveled with is 33.3 km/h

Remember, we stated that Tahir travels at a speed of S/3, that is, The speed of Tahir is

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300 km would then be traveled in 300 km/11.1 km/h = 27 hours.

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7 0
3 years ago
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