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finlep [7]
3 years ago
7

Hi:) anyone able to help with part - aii the one on cooling fins ? Thankss!

Physics
1 answer:
taurus [48]3 years ago
5 0

The cooling find are there to keep the temperature low. They are mostly black in color, and hence, radiate heat, which is how the temperature is controlled.

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A spinning disc rotating at 130 rev/min slows and stops 31 s later. how many revolutions did the disc make during this time?
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3 years ago
The gauge pressure inside an alveolus with a 200 µm radius is 25 mmHg, while the blood pressure outside is only 10 mmHg. Assumin
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Answer:

The surface tension is 0.0318 N/m and is sufficiently less than the surface tension of the water.

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As per the question:

Radius of an alveolus, R = 200\mu m = 200\times 10^{- 6}\ m

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