3 years ago

What does a mechanical wave always travel through?

1 answer:

6 0

A mechanical wave requires an initial energy input. Once this initial energy is added, the wave travels through the medium until all its energy is transferred.

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lakkis [162]

AnsweR

Explanation:

beaker B becz of increased surface area

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3 years ago

Do the math for 30%÷75

Dafna1 [17]

" 30% " means " 0.30 "

30% ÷ 75 means (0.30 / 75) = 0.004

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3 years ago

An athlete runs around a circular track of radius 50 m and finishes at the same point where he began his journey. His total disp

son4ous [18]

Answer:

Explanation:

His displacement is 0 because he ended up exactly where he started.

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3 years ago

Light rays in a material with index of refrection 1.29 1.29 can undergo total internal reflection when they strike the interface

deff fn [24]

Answer:

The second material's index of refraction is 1.17.

Explanation:

Given that,

Refractive index of the material, n = 1.29

Critical angle is 65.9 degrees.

We need to find the second material's index of refraction. We know that at critical angle of incidence, angle of refraction is equal to 90 degrees. Using Snell's law as:

$n_1\sin \theta_c=n_2\sin (90)\\\\n_2=n_1\sin \theta_c\\\\n_2=1.29\times \sin (65.9)\\\\n_2=1.17$

So, the second material's index of refraction is 1.17.

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3 years ago

Questions on the photo

White raven [17]

Answer:

Option C: Third Class

Explanation:

This is third class because the effort or the input force is in the middle between the fulcrum and the load.

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3 years ago