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4 years ago

Explain why the aurora borealis, or northern lights, can be seen at the North Pole but not at the equator.

2 answers:

Montano1993 [528]4 years ago

8 0

At north pole the magnetic field strength is very high due to which charge particles enter with very high speed and the air get oxidized and when its excited electrons come back to ground state it releases the photons of different colors.

Now this phenomenon is possible only when magnetic field strength is good so near the north pole and south pole of earth this strong magnetic field exist which can exhibit the phenomenon of aurora borealis and since the magnetic field strength is less at equator so we can not see this phenomenon near equator.

pickupchik [31]4 years ago

4 0

Sample Response: When charged particles from the Sun enter Earth's magnetosphere, the positive ions and negative ions create a ring current that is opposite Earth's magnetic field. This current reduces Earth's magnetic field especially at the poles. When the charged particles enter Earth's atmosphere at the poles, they collide with other atoms at high-altitude areas and produce the aurora borealis, or northern lights.

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As a transverse wave travels through a rope from left to right, the parts of the rope _______.

kupik [55]

<h3><u>Answer;</u></h3>

Are moving up and down.

As a transverse wave travels through a rope from left to right, the parts of the rope <u>are moving up and down</u>.

<h3><u>Explanation;</u></h3>

Transverse waves occur when a disturbance causes oscillations perpendicular to the propagation, that is the direction of energy transfer.
<em><u>Particles of the medium move perpendicular to the direction the transverse wave itself is moving. For example, if the wave is moving to the right, the particles of the medium are moving up and down.</u></em>
<em><u>Therefore, as a transverse wave travels through a rope from left to right, the parts of the rope are moving up and down.</u></em>

8 0

4 years ago

a light-year is ____ A. the amount of time it takes light to get to the nearest star B. the distance light travels in a day C. t

Vinil7 [7]

The Answer is C. the distance light travels in a year

6 0

3 years ago

Read 2 more answers

A square coil with a side length of 16.0 cm and 29 turns is positioned in a region with a horizontally directed, spatially unifo

tensa zangetsu [6.8K]

Answer:

$\epsilon_{max} = 0.774 \ V$

$wt = 0^o$

Explanation:

From the question we are told that

The length of the side is $l = 16.0 \ cm = 0.16 \ m$

The number of turns is $N = 29 \ turns$

The magnetic field is $B = 83.0 mT = 83 *10^{-3} \ T$

The angular speed is $w = 1.20 * 10^2 rev/min = \frac{1.20 *10^2 * 2\pi}{60 } = 12.6 \ rad/s$

Generally the area is $A = l^2$

Generally the induced emf is mathematically represented as

$\epsilon = N * w * B * A * cos(wt)$

At maximum $cos(wt) = 1$

$\epsilon_{max} = N * w * B * A$

$\epsilon_{max} = 29 * 12.6 * 83*10^{-3}* (l^2)$

=> $\epsilon_{max} = 29 * 12.6 * 83*10^{-3}* ((0.16)^2)$

=> $\epsilon_{max} = 0.774 \ V$

At maximum emf

$cos (wt) = 1$

=> $(wt) = cos^{-1} (1)$

=> $wt = 0^o$

6 0

3 years ago

james throws a baseball with a horizontal component velocity of 30 m/s east and a vertical component velocity of 40m/s North.How

olga2289 [7]

Force vectors, use Pythagoras to get resultant force: sqrt ((30^2 + (40^2)) = 50m/s

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3 years ago

Write one to two sentences that summarize Bernoulli's principle.

Ierofanga [76]

Answer and Explanation:

Bernoulli's Principle deals with Fluid dynamics and fluid includes both liquid and gas.

The Principle gives an inverse relation between the speed or velocity of the fluid and the pressure of the fluid. It gives the speed or velocity of the liquid over varying pressure.

Bernoulli's Principle states that for a given fluid,the low pressure region will have high speed or velocity and high pressure region will have low speed or velocity

4 0

3 years ago