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tangare [24]
3 years ago
10

Which of these phenomena results in polarization of light?

Physics
2 answers:
Cerrena [4.2K]3 years ago
4 0
<span>its reflection of light from a glass surface
</span>
vampirchik [111]3 years ago
3 0

Answer:

B. reflection of light from a glass surface.

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Assuming motion is on a straight path, what would result in two positive components of a vector?
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Answer: option <span>A) a train moving north of east at an angle of 25°
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Explanation:

1) You need to choose your axis. In this case North is vertical and positive, South is vertical and negative, East is horizontal and positive, and West is horizontal and negative.

2) The vector with the two positive components is a vector in the first quadrant (North and East). That is what North of East 25° means.

3) Regarding the other options:

<span>B) a bus moving North of East at an angle of 95°: since the angle is greater tnan 90° the vector is in the second quadrant: its horizontal component is negative.
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</span><span> C) a boat moving South of West at an angle of 40°: this is in the third quadrant: the two components are negative.</span>
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</span><span> D) a car moving south of west at an angle of 10°: as in the option C), this is in the third quadrant: the two components are negative.
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3 years ago
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8 0
3 years ago
A 150-newton force, applied to a wooden crate at an angle of 30° above the horizontal, causesthe crate to travel at constant vel
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Answer:

Explanation:

A component of 150 N in vertical direction will reduce the magnitude of reaction force.

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= mg - 150 sin 30

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This force tries to pull the crate in forward direction with acceleration but it has no acceleration . It is so because frictional force of equal magnitude acts on it in opposite direction which makes the net force acting on it equal to zero.

Hence frictional force is equal to 150 cos 30.

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