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Rudiy27
3 years ago
11

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:
Ghella [55]3 years ago
6 0

Answer:

Acceleration is percieved, not constant velocity.

Explanation:

You are most aware when the vehicle is accelerating. At constant velocity you would not be aware of the motion. Only if the system is accelerated the dynamics must be solved considering a pseudo-force (of inertial origin) acting.

It's because of this that:

(A) False. The acceleration can be detected from the inside of a closed car.

(B) False. You would be aware of the motion, but not because humans can sense speed but acceleration.

(C) False. Constant velocity cannot be felt in a closed car.

(D) False. Again, you can't feel constant speed.

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a is the correct choice

Explanation:

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Precipitation amounts

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Let the key is free falling, therefore from equation of motion

h = ut +\frac{1}{2}gt^2..

Take initial velocity, u=0, so

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h = 0\times t + \frac{1}{2}g t^2= \frac{1}{2}gt^2 \\\ t =\sqrt{\frac{2h}{g} }

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Now substituting all the given values and g = 9.8 m/s^2, we get

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Gases

The internal molecular structure of gases has the widest range of space among one another and thus they have a floating property because of least density.

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A complete ionized gas which has equal amount of positively and negatively charged ions. The best example of plasma is a plasma-ball.

<u>Phase transformation among the four forms of matter</u>

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A matter changing from a solid phase to liquid phase is known as melting. Ex: Ice into water

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A matter changing from liquid to solid is known as freezing.

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Once the liquid reached the temperature range above the boiling point ad starts converting into vapours or gaseous state.

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When the gases changes from the gaseous phase to liquid phase, this is called condensation.

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The change of solid into gas is called as sublimation.

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