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Levart [38]
2 years ago
7

Why do you see lightning before you hear the thunder?

Chemistry
2 answers:
krok68 [10]2 years ago
8 0

B,speedof light>speed of sound

Bond [772]2 years ago
3 0
The second one “light travels faster then sound through the air”
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Luminosity is the amount of energy emitted by a star each second. Stars radiate light over a broad range of frequencies in the e
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Luminosity is the amount of energy emitted by a star each second. Stars radiate light over a broad range of frequencies in the electromagnetic spectrum, <span>from the low energy radio waves to high energy gamma rays. Energy emitted from stars is the result of fusion of gases within its core</span>
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3 years ago
Which is a characteristic of mixtures?
d1i1m1o1n [39]

Answer: They can be separated by physical processes.

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3 years ago
A device that does work with only one movement and changes the size or direction of a force is a(n) ____.
worty [1.4K]

Answer:

A device that does work with only one movement and changes the size or direction of a force is a simple machine.

Explanation:

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  • Simple machine changes the direction as well as the amplitude of the applied force i.e. we can increase or decrease the magnitude of the force.
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  • Some of the examples of simple machines are inclined plane, lever, wedge, wheel and axle, pulley, and screw.
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3 years ago
8. Bring the balloon in contact with the wall. What happens to the charges in the wall?
Ne4ueva [31]

When the charged balloon is brought near the wall, it repels some of the negatively charged electrons in that part of the wall. Therefore, that part of the wall is left repelled.

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  • Balloons don't stick to walls. However, if you rub the balloon on an appropriate piece of material such as clothing or a wall, electrons are pulled from the other material to the balloon.
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  • The other material now has an overall positive charge. Because opposite charges attract, the balloon will now appear to stick to the other material. If you didn't rub the balloon first, it's charge would be neutral and it wouldn't stick to the wall.
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Question 21 of 25
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Answer:

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