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Nostrana [21]
3 years ago
13

How Do The Northern Lights work?

Physics
1 answer:
pishuonlain [190]3 years ago
6 0

1.) Electrons go back into like a lower energy level then would be release a thing called a photon light.

2.) I'm not sure on the correct numbers exactly but if I remember correctly around 70-80 percent is nitrogen, around 20-25 is percent oxygen, 0.9 percent is argon, and 0.1 percent other gases. 

3.) Glass is made from sand at least that's one popular element of making sand. one gathered, they are put into a high temperature and would soon make glass coming out of it within time.

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Correlation alone_____ causation A.proves B.complicates C. Disproves D. does not prove
tatuchka [14]

Answer:

D.

Explanation:

This is the essence of “correlation does not imply causation”. When there is a common cause between two variables, then they will be correlated. This is part of the reasoning behind the less-known phrase, “ There is no correlation without causation ”.

5 0
4 years ago
What simple machine makes up most of the joints in your body
Vladimir [108]
Levers
Most machines in your body are levers that consist of bones and muscles. Tendons and muscles pull on bones, making them act as levers. Joint, near where tendon is attached to bone acts as fulcrum. Muscles produce input force.
3 0
3 years ago
a stone is tied to a string and whirled around in a circle at a constant speed. is the string more likely to break when the circ
DochEvi [55]

Answer:

The string is more likely to break when the circle is vertical

Explanation:

The string is more likely to break when the circle is vertical because tension in the string is the same throughout the circular motion and it is equal to mrw^2 when it is rotated in the horizontal plane while tension in the string is maximum and is given by mrw^2+mg when in the vertical plane.

3 0
3 years ago
Diffuse reflection occurs when the size of surface irregularities is
erik [133]

Answer:

Varies from point to point on the surface of the material.

Explanation:

Diffusion reflection is the reflection of light due to irregular reflection angles on the material surface. It might be as a result of microscopic irregularities on the material surface or just plain non reflecting ability of the material.

7 0
3 years ago
Are tires designed to increase rolling friction and decrease sliding friction?
saul85 [17]
Yes. Tires are designed to help a car come to a rolling stop, rather than a sliding stop, therefore producing more rolling friction than sliding friction. 
6 0
3 years ago
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