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Evgesh-ka [11]
3 years ago
7

Does Earth have a magnetic variation?

Physics
2 answers:
-Dominant- [34]3 years ago
5 0

Answer:

Correct answer is  Yes, the location of Earth's magnetic poles are constantly changing

Explanation:

Researches are going on since last century to study earth's magnetic poles. Scientists are studying about the  position of Earth's magnetic poles since early 1900s.  It was reveiled that north pole of Earth’s magnetic field isconstantly-shifting point i is moving along a relatively straight path from Canada towards the Arctic Circle. It is not clear why Earth's magnetic poles are constantly changing.

densk [106]3 years ago
3 0
<span> Yes, the location of Earth's magnetic poles are constantly changing.

so c. :)
</span>
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If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses that th
olga55 [171]

Answer:

f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

Explanation:

A person is nearsighted when the person's far point is less than infinity. A diverging lens is normally used to correct this eye defect. A diverging lens has a negative focal length as seen in the solution attached.

Farsightedness is when a person's near point is farther than 25cm. This eye defect is corrected using a converging lens. The focal length of a converging lens is positive. This is evident in the solution attached. The near point is also referred to as the least distance of distinct vision.

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4 years ago
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Answer:

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