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RoseWind [281]
3 years ago
12

A _______ is often used to cut holes to install outlet boxes in old installations.

Physics
1 answer:
mars1129 [50]3 years ago
8 0
Answer is key whole saw.

Key whole saw is more often used to cut holes to install outlet boxes into a old installations.

Hope it helped you.

-Charlie
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:What will be the value of the refractive index of the medium? Critical angle of that medium is 30 degree
earnstyle [38]

Answer:

Let the second medium be air (n₁=1)

The refractive index n₂ of the medium where first medium is air is found (a)

(a) n₂ = 2

Explanation:

Critical angle can be defined as the angle of incidence that provides the angle of refraction of 90°.

Refractive index of a medium can be defined as a number that describes that how fast a light will travel through that medium.

Critical angle and Refractive index are related by:

\theta_{critical}= sin^{-1}(\frac{n_1}{n_2})

sin \theta_{critical}=\frac{n_1}{n_2}

To find refractive index of medium with respect to air, substitute n₁=1 (Refractive index of air is 1)

Also θ(critical)=30°

Find n₂ :

sin30= \frac{1}{n_2}\\0.5=\frac{1}{n_2}\\n_2=\frac{1}{0.5}\\n_2=2

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3 years ago
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100N/100kg = 1(m/s^2)
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Explanation:

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