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erastova [34]
2 years ago
11

7. When a wave crosses a surface at an angle from one medium into another, why does it change directions as it moves across the

boundary into the new medium? Use 3 – 4 complete sentences in your own words to explain.
Physics
1 answer:
Debora [2.8K]2 years ago
7 0
The changing direction of light is called refraction. This happens because the medium that the wave is going into is either more dense or less dense than the medium the wave was in before. Depending on the density of the second medium, the wave will refract either closer or farther away from the normal (a verticle line in the middle in which you calculate the incident and refracted rays from). If the second medium is denser than the first medium, then the wave will move closer to the normal. If the second medium is less dense, then the wave will move away from the normal.
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Ganezh [65]

Answer:

Plasma

Explanation:

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A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?​
Trava [24]

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23.49m

Explanation:

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A set of charged plates 0.00262 m apart has an electric field of 155 N/C between them. What is the potential difference between
mylen [45]

Answer: The potential difference between the plates = 0.4061V

Explanation:

Given that the

Electric field strength E = 155 N/C

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From the definition of electric field strength, is the ratio of potential difference V to the distance between the plates. That is

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Cross multiply

V = 155 × 0.00262

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The potential difference between the plates is 0.4061 V

5 0
3 years ago
The y-component of the force F which a person exerts on the handle of the box wrench is known to be 86 lb. Determine the x-compo
emmainna [20.7K]

Answer:

x-component of force is  38.18 lb where as magnitude of Force is 93.16

Explanation:

Fy of the force F exerted on the handle of the box wrench = 86 lb

Considering the triangle in Fig 1

magnitude of perpendicular = P =  12

magnitude of base = B = 5

using Pythagoras theorem

                        H= \sqrt{P^{2} + B^{2}}

                 H= \sqrt{12^{2} + 5^{2}}

            H=13\\\implies cos \theta = \frac{5}{13} \\\implies sin \theta = \frac{12}{13}\\

y-component of force is given given as:

                              86 = Fsin\theta\\F = 86 (\frac{13}{12})\\F = 93.16 lb\\F_{x} =F cos \theta\\F_{x} = 93.16 (\frac{5}{13})\\F_{x} =38.18 lb.

5 0
3 years ago
Newtons law of garvitation is known as universal law. Why​
xeze [42]

Answer:

It is called so because it is applicable on all bodies having mass, and the bodies will be governed by the same law, that is newton's law of gravitation. Thus, as it is applicable universally, it is called as universal law.

5 0
3 years ago
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