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erastova [34]
3 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]3 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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A sample of oxygen gas occupies a volume of 5.0L at 90kPa pressure. What volume will it occupy at 145kPa?
Burka [1]

Answer:

<h3>The answer is option A</h3>

Explanation:

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V_2 =  \frac{P_1V_1}{P_2}  \\

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We have the final answer as

<h3>3.10 L</h3>

Hope this helps you

7 0
3 years ago
A 10 kg gun recoils with a speed of 0.1 m/s after it fires a 0.001 kg bullet. What is the speed of the bullet?
Kitty [74]

As we know that here gun + bullet system is isolated from all other external force system

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so we will say

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here we know that

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3 0
3 years ago
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