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mina [271]
3 years ago
9

When light travels from air to water at an angle which of the following happens? a) The light slows down and it changes directio

n away from the perpendicular. b) The light slows down and it changes direction towards the perpendicular. c) The light speeds up and it changes direction away from the perpendicular. d) The light speeds up and it changes direction towards the perpendicular.
Physics
1 answer:
beks73 [17]3 years ago
6 0

Answer:

b) The light slows down and it changes direction towards the perpendicular.

Explanation:

Light travels at different speed in different mediums.

Refractive index is equal to velocity of the light 'c' in empty space divided by the velocity 'v' in the substance.

Or ,

n = c/v.

Light travels at a slower speed in water as compared to air because there are more number of interfering molecules in the path of the light in case of water as compared to liquid.

<u>When a light travels from lower denser medium say water to higher denser medium say water, it bends towards the perpendicular as its speed reduces in that medium.</u>

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Explanation:

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Physics, calculating net force. Please work it out for me
Margarita [4]

Answer:

F = 2985.125 N

Explanation:

Given that,

The radius of curvature of the roller coaster, r = 8 m

Speed of Micheal, v = 17 m/s

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F=\dfrac{mv^2}{r}+mg\\\\F=m(\dfrac{v^2}{r}+g)\\\\=65(\dfrac{17^2}{8}+9.8)\\\\=2985.125\ N

So, the net force is 2985.125 N.

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3 years ago
Does the number of particles change as the substance changes its state?​
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4 0
3 years ago
1.) How much potential energy does an object with a mass of 3 kg have on top of a stand 12 meters
Elena-2011 [213]

Answer:

<h2>352.8 Joules</h2>

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 3 × 9.8 × 12

We have the final answer as

<h3>352.8 J</h3>

Hope this helps you

7 0
3 years ago
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