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lyudmila [28]
3 years ago
7

An electroscope is a device that detects charge on objects that touch it or are brought near it. John rubs a piece of cotton fab

ric on a plastic rod and then touches the rod to the electroscope.
What methods of charging does John use?
Physics
2 answers:
Nimfa-mama [501]3 years ago
8 0
The answer is Static Electricity. When you say static electricity, there is a certain imbalance in the particles present on the surface of the material. That is why the electroscope was able to detect static electricity from the piece of cloth and plastic rod
iogann1982 [59]3 years ago
4 0

Answer:

John charges the rod through friction, then charges the electroscope through conduction. D on edg2020

Explanation:

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Answer:

therefore critical angle c= 69.79°

Explanation:

Canola oil is less dense than water, so it floats over water.

Given n_{canola}= 1.47

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now putting values we get

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c= sin^{-1}(\frac{1.33}{1.47} )

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therefore critical angle c= 69.79°

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