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Scilla [17]
3 years ago
10

How long does it take light ray B to reach the girls eye? (speed of light at 3*10^8) And could someone explain why?

Physics
1 answer:
kodGreya [7K]3 years ago
6 0

Explanation:

Using properties of 30-60-90 triangles, the distance from the vase to the mirror is 2/√3, and the distance from the mirror to the girl is also 2/√3.  So the light travels a total distance of 4/√3 meters.

t = d / v

t = (4/√3 m) / (3×10⁸ m/s)

t = 7.7×10⁻⁹ s

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The total momentum of the players after collision is 130 kgm/s.

The given parameters:

  • <em>Initial momentum of the returner, </em>P_i_1<em> = 0 kgm/s</em>
  • <em>The initial momentum of the diving player, </em>P_i_2<em> = 130 kgm/s</em>

The total momentum of the players after collision is determined by applying the principle of conservation of linear momentum as follows;

P_f = P_i_1 + P_i_2\\\\P_f = 0 + 130\\\\P_f = 130 \ kgm/s

Thus, the total momentum of the players after collision is 130 kgm/s.

Learn more about conservation of linear momentum here: brainly.com/question/7538238

6 0
2 years ago
Will mark as brainliest if correct!!!!!!!!
ArbitrLikvidat [17]

Answer:

Light refracts when its speed changes as it enters a new medium.

Explanation:

Bending of light wave while it entering a medium with different speed is called refraction of light. Light passing from a faster medium to the slower medium bends the light rays toward the normal to boundary between two media. The amount of the  bending of light depends on refractive index of the two media which is described by  the Snell's Law. The angle of incidence is not equal to  angle of refraction. Rainbow is caused but this refraction phenomena. Also Refraction is used in magnifying glasses, prism and lenses

 

7 0
2 years ago
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Jobisdone [24]
Hey!!

here is your answer >>>

We know that, acids and strong bases are good conductors of electricity!. And gold conducts electricity , while the best is silver and niext comes gold!. And H20 which is water contains less ions , so it is not a good conductors , it is a conductors but not a good conductor!. Salt in it's solid for cannot produce ions, hence, it cannot conduct electricity , but when this salt is mixed with water or when it is in it's molten state it can conduct electricity!. So now,the answer for the question is ,

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3 years ago
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300 divide 1.5=200 let me know if this was helpful
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2 years ago
Which of the following statements are true? (mark all that apply)
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Answer:

(a) and (b)

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Energy is the capacity to do work, and exists in various forms. These forms can be converted one to another by the use of appropriate means. Some examples are sound, mechanical, solar, light, which causes the sensation of vision, etc. energy is measured in Joules (J).

The rate of transfer of energy is called power.

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