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ivolga24 [154]
3 years ago
10

In refraction, when a wave travels from one medium to another, it

Physics
2 answers:
Alona [7]3 years ago
8 0

A.) Changes speed

hope this helps

kirill115 [55]3 years ago
3 0
In refraction, when a wave travels from one medium to another it changes speed.

Correct option is A.
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A positive charge is fixed at point (−4,−3) and a negative charge − is fixed at point (−4,0). Determine the net electric force ⃗
Masteriza [31]

The net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).

<h3>Net electric force on the charges</h3>

The net electric force on the charges is calculated as follows;

F = kq₁q₂/r²

where;

  • k is coulomb's constant
  • q₁ and q₂ are the charges
  • r is the distance between the charges
<h3>Distance between the charges</h3>

|r| = \sqrt{(x_2-x_1)^2+ (y_2-y_1)^2} \\\\|r| = \sqrt{(-4--4)^2+ (0--3)^2} \\\\|r| = \sqrt{(0)^2 + (3)^2} \\\\|r| = 3 \ units

F_{net} = \frac{kq_1q_2}{3^2} \\\\F_{net} = \frac{1}{9} (kq_1q_2) , \  N

Thus, the net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).

Learn more about electric force here: brainly.com/question/17692887

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3 0
2 years ago
Which object has more momentum?
lakkis [162]

Answer:

3. Large butterfly in flight, flying through the air?

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3 years ago
20.
sveticcg [70]

Answer:

I believe the answer is A and D.

I am unsure of C.

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The three branches of science are life, earth, and physical science.
Life science deals with living organisms, so, biology is the most important of these sciences, although there are many.
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