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Zina [86]
3 years ago
13

I just need help with these seven!

Physics
1 answer:
Anna [14]3 years ago
5 0
21. light changes its direction when travelling through a new medium because denser mediums have a higher angle of refraction.
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a girl that has a mass of 55kg is standing on a floor, how much supporting force does the floor have?
KengaRu [80]
A girl standing on a floor would have two opposite forces acting on it. These forces are the weight and the normal force. Since no other forces are acting and that the girl is at rest, then the weight must equate to the normal force. Therefore, the supporting force would be:

F = mg = 55kg (9.81 m/s^2) = 539.55 N
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3 years ago
What Converts sound to a signal in a telephone
Irina-Kira [14]

The part you talk into, that converts the sound of your voice
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-- The sound waves from your voice are ripples in the air.

-- In most microphones, there's a tiny coil of wire hanging
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-- When the ripples in the air hit the little coil of wire, they
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-- When a coil of wire wiggles in the field of a magnet,
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There's
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A student is performing a double-slit experiment to determine the wavelength of a light source. She has measured the distance be
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Answer:

lights need elewctricity

Explanation:

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Weight on planet Mars ​
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Mars: 0.38

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multiplying your weight on Earth by the number above will give you your weight on the surface of Mars

If you weigh 150 pounds (68 kg.) on Earth, you would weigh 57 lbs. (26 kg.) on Mars

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Prove that the unit of area derived quantities are derived units​
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