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Gre4nikov [31]
3 years ago
6

Which statement best describes beaches? Beaches change over time as waves move further up the shore. Beaches are always changing

due to factors such as waves adding and eroding sand. Beaches change little over time as wind patterns stay the same. Beaches change little over time as waves follow the same patterns year after year.
Physics
1 answer:
NemiM [27]3 years ago
3 0

Answer:

I think the 1st statement is right.

Explanation:

Wind patterns doesn't stay the same.

Waves don't follow the same patterns.

Waves move further up the shore.

I didn't hear about "waves adding" before..so i guess 1st statement is right.

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Neporo4naja [7]

Answer:

n = 1,875

Explanation:

The speed of light in vacuum is constant (c) and in a material medium it is

          v = d / t

The refractive index of a material is defined by

         n = c / v

         

Let's look for the speed of light in the material, in general the length that light travels is known, this value is high, x = 1, when we place a block on the road, a small amount is lengthened by the length of the block, which in general is despised

These measurements are made on a digital oscilloscope that allows to stop the signals and measure their differences, that is, the zero is taken when the first ray arrives and the time for the second ray is measured,

         

         v = d / t

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         v = 1.6 10⁸ m / s

we calculate the refractive index

        n = 3 10⁸ / 1.6 10⁸

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6 0
3 years ago
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Answer:

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Two identical small metal spheres with q1 > 0 and |q1| > |q2| attract each other with a force of magnitude 81 mN when sepa
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Answer:

Explanation:

Check the attachment for solution

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a car travels 10 miles east in 30 minutes. what is its velocity in miles per hour. what is its velocity in miles per hour?
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lord [1]

Answer:

F = 1400 N

Explanation:

It is given that,

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Force is given by the product of mass and acceleration. So,

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So, the force of 1400 N is exerted by a metal ball.

8 0
3 years ago
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