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tensa zangetsu [6.8K]
3 years ago
6

Which statement about coal is true? When burned, coal produces pollutants that are released into the air. Coal will always stay

plentiful in the United States. Mining coal improves the environment. Burning coal does not pollute the air.
Physics
1 answer:
Svetllana [295]3 years ago
7 0
2, coal is a renewable resource
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An object moves at a constant speed of 6m/s. this means that the object​ moves 6 meters every second

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4 years ago
The critical angle between a medium and air is 430. What is the speed of light in that medium?
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Answer:

The speed of light is that medium is 281907786.2 m/s.

Explanation:

since the critical angle is Фc = 430, we know that the refractive index is given by:

n = 1/sin(Фc)

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then if n is the refractive index of the medium and c is the speed of light, then the speed of light in the medium is given by:

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5. Work is being done when a force
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work is done when a force is applied. the force must not be zero and should make the object move through a certain distance.

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An oscillator creates periodic waves on two strings made ofthe same material. The tension is the same in both strings.If the str
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Answer:

c. wavelength

Explanation:

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The frequency and speed relation is,

f= γλ

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