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s344n2d4d5 [400]
3 years ago
12

A flat polished area is turned through 15 degrees. If the angle of incidence is 20 degrees, what is the angle between the incide

nt ray and the reflected ray of the turned surface?
Physics
1 answer:
Ilya [14]3 years ago
7 0

Answer:

<h2>50°</h2>

Explanation:

Angle of rotation of the flat polished surface \theta = 15°

angle of incidence i = 20°

Since the polished surface is turned at an angle of 15°, the angle of reflection

r = 2\theta (Note that the angle of rotation only have effect of the angle of reflection)

r = 2*15 = 30°

The angle between the reflected ray and the incident ray will be equal to the sum of the angle of incidence and the angle of reflection i.e i+r

The angle between the reflected ray and the incident ray = 20°+ 30° = 50°

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Answer:

2160.26 N.

Explanation:

From the question,

The total energy of the woman = work done by the water.

mg(h+d) = F'×d.......................... Equation 1

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make F' the subject of the equation

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One student did an experiment with two unknown minerals, Mineral 1 and Mineral 2. The hardness scale shown below was used for th
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