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3 years ago

ANSWERS UNDER QUESTIONS:

Physics

2 answers:

Nataliya [291]3 years ago

7 0

Answer:

B and E

Explanation:

Julli [10]3 years ago

6 0

<h2>Answers:</h2><h2 /><h2>a) Arrow B</h2><h2>b) Arrow E</h2>

Explanation:

Refraction is a phenomenon in which a wave (the light in this case) bends or changes its direction <u>when passing through a medium with a refractive index different from the other medium.</u> Where the Refractive index is a number that describes how fast light propagates through a medium or material.

According to this, if we observe the rays A an D passing throgh the biconcave lens, we will have two mediums:

1) The air

2)The material of the biconcave lens

This two mediums have different refractive indexes, hence the rays will change the direction.

-For the incident ray A, the corresponding refractive ray is B, because is the ray that bends after passing throgh the lens

-For the incident ray D, the refracted ray is E following the same principle.

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xeze [42]

Answer and Explanation:

As per the question:

When the stone is thrown from the cliff top and hits the ground below eventually:

R = $v_{o}\sqrt{\frac{2H}{g}}$

where

$v_{o}$ = initial velocity

H = height

g = acceleration due to gravity

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Now,

(a) Displacement of the stone is given by the horizontal range:

R = $v_{o}\sqrt{\frac{2H}{g}}$

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(b) Speed just prior to the impact is given by the third equation of motion:

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where

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4 years ago

A pressure antinode in a sound wave is a region of high pressure, while a pressure node is a region of low pressure.

maks197457 [2]

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Answer:

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Explanation:

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