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timurjin [86]
3 years ago
6

What happened on march 21 every year in the northern hemisphere​

Physics
1 answer:
OLga [1]3 years ago
4 0

Answer:

B. The Spring equinox

Explanation:

The vernal equinox marks the moment the sun crosses the celestial equator.  The vernal equinox happens on March 19, 20, or 21 every year in the Northern Hemisphere. In the Southern Hemisphere, this same event marks the beginning of fall.  (Source: What Exactly Is The Spring Equinox? - Dictionary.com)

Hopefully this helps.

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3 years ago
Given that a pipe having a diameter of 1.5 feet and a height of 10 feet, what is the psi at 5 feet ?
grin007 [14]

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The pressure is 2.167 psi.

Explanation:

Given that,

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