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ddd [48]
3 years ago
7

A ray of light is traveling from water into a diamond. Upon hitting the diamond, a light ray bends toward the normal. With this

information, what can you say about the speed of light as it passes from water into a diamond?
A.) the speed increases
B.) the speed decreases
C.) the speed drops to zero
D.) the speed does not change

The correct answer is B, the speed decreases
Physics
2 answers:
avanturin [10]3 years ago
4 0
The correct answer is b


Alexandra [31]3 years ago
3 0

Answer:

<u><em>The answer is</em></u>: <u>B.) the speed decreases</u>.

Explanation:

<em>When the light passes from one medium to another, its speed changes</em>.

<em>The light is affected by the medium it passes through, so that the denser the medium is</em>, the lower the speed of light. <em>When crossing a diamond, for example, which is a very dense medium</em>, the speed of light is reduced by a factor of 2,417.

<u><em>The answer is</em></u>: <u>B.) the speed decreases</u>.

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What is the SI (metric) unit of FORCE?

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brilliants [131]

Answer:

1) Mass that needs to be converted at 100% efficiency is 0.3504 kg

2) Mass that needs to be converted at 30% efficiency is 1.168 kg

Explanation:

By the principle of mass energy equivalence we have

E=mc^{2}

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'E' is the energy produced

'm' is the mass consumed

'c' is the velocity of light in free space

Now the energy produced by the reactor in 1 year equals

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Thus the mass that is covertred at 100% efficiency is

mass=\frac{Energy}{c^{2}}\\\\mass=\frac{31.536\times 10^{15}}{(3\times 10^{8})^{2}}\\\\mass=\frac{31.536\times 10^{15}}{9\times 10^{16}}\\\\\therefore mass=0.3504kg

Part 2)

At 30% efficiency the mass converted equals

mass|_{30}=\frac{mass|_{100}}{0.3}\\\\mass|_{30}=\frac{0.3504}{0.3}\\\\mass|_{30}=1.168kg

8 0
4 years ago
Sound wave A delivers 2 J of energy in 2 s. Sound wave B delivers 10 J of energy in 5 s. Sound wave C delivers 2 mJ of energy in
Dmitry [639]

Answer:

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3 years ago
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Answer:

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