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MatroZZZ [7]
3 years ago
5

would you expect the air pressure in a valley thats below sea level to be higher or lower than the air pressure at sea level

Physics
1 answer:
mixer [17]3 years ago
4 0
It would depend on how deep the water or pressure is but I persanlly be higher
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The ball of a ballpoint pen is 0.5 mm in diameter and has an ASTM grain size of 12. How many grains are there in the ball
Fudgin [204]

Given :

The ball of a ballpoint pen is 0.5 mm in diameter and has an ASTM grain size of 12.

To Find :

How many grains are there in the ball?

Solution :

Volume of ball of the ballpoint is :

V = \dfrac{4 \pi r^3}{3}\\\\V = \dfrac{4\times 3.14 \times 0.5^3}{3}\ mm^3\\\\V = 0.523\  mm^3

Now, grain size of 12 has about 520000 grains/mm³.

Therefore, number of grains are :

n = 520000\times 0.523\ grains\\\\n = 271960\ grains

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Answer:

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Explanation:

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2 years ago
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Which of the following will not reduce water pollution?
Rina8888 [55]

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7 0
3 years ago
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