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MAVERICK [17]
3 years ago
5

When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelera

ting? If you were in a car that moved with absolutely constant velocity (no bumps at all), would you be aware of the motion?A) Accelerating. You would not be aware of the motion if you did not look outside the car.B) Accelerating. You would be aware of the motion because humans can sense speed.C) Moving steadily in a straight line. You would be aware of the motion because you can feel velocity even in a closed car.D) Moving steadily in a straight line. You would be aware of the motion because you can feel the speed.
Physics
1 answer:
jenyasd209 [6]3 years ago
3 0

Answer:

A) Accelerating. You would not be aware of the motion if you did not look outside the car

Explanation:

Since human cannot sense the motion (unless visually), but the inertia force caused due to the acceleration of the motion. So if you are in a car with constant velocity, there's no acceleration and no inertia force, you would not be able to sense the motion at all unless you look outside.

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The top of a swimming pool is at ground level. If the pool is 3.00 m deep, how far below ground level does the bottom of the poo
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Answer:

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b) 2.625 m

Explanation:

Refraction is the name given to the phenomenon of the speed of light changing the the boundary when it moves from one physical medium to the other.

Refractive index is the ratio of the speed of light in empty vacuum (air is an appropriate substitution) to the speed of light in the medium under consideration.

In terms of real and apparent depth, the refractive index is given by

η = (real depth)/(apparent depth)

a) Real depth = 3.00 m

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Refractive index, η = 1.333

1.333 = 3/(apparent depth)

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Hence the bottom of the pool appears to be 2.25 m below the ground level.

b) Real depth = 1.5 m

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Refractive index, η = 1.333

1.3333 = 1.5/(apparent depth)

Apparent depth = 1.5/1.3333 = 1.125 m

But the pool is half filled with water, there is a 1.5 m depth on top of the pool before refraction starts.

So, apparent depth of the pool = 1.5 + 1.125 = 2.625 m below the ground level

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