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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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kogti [31]

Answer:

the potential energy of this body is 245 J.

Explanation:

Given;

mass of the body, m = 250 g = 0.25 kg

height from which the body was dropped, h = 100 m

acceleration due to gravity, g = 9.8 m/s²

The potential energy of this body is calculated as;

P.E = mgh

substitute the given values and solve for the potential energy of this body;

P.E = 0.25 x 9.8 x 100

P.E = 245 J.

Therefore, the potential energy of this body is 245 J.

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2 years ago
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3 years ago
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maw [93]

Answer:

Amplitude—distance between the resting position and the maximum displacement of the wave

Frequency—number of waves passing by a specific point per second

Period—time it takes for one wave cycle to complete

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AysviL [449]

Answer:

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Explanation:

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