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PLEASE HELP!!!!!
Gary and Devonte are doing an experiment with an electroscope. They bring a negatively charged rod close to the top of a charged electroscope. The two metal pieces of the electroscope were spread apart already, but now they move farther away from each other. Gary says that the experiment proves that the electroscope had a negative charge before they started experiment, but Devonte disagrees and said it must have had a positive charge since the metal pieces moved farther away. Who is right and why?


The electroscope had a positive charge before the experiment started. The negatively charged rod attracts the electrons in the electroscope and makes the metal pieces spread further apart.


The electroscope had a positive charge before the experiment started. The negatively charged rod repels protons and makes the metal pieces spread further apart.


The electroscope had a negative charge before the experiment started. When the negatively charged rod comes near the electroscope more electrons are repelled down to the metal pieces and the metal pieces move farther away from each other.


The electroscope had a negative charge before the experiment started. The negatively charged rod attracts electrons and causes the metal pieces to move further apart.

Respuesta :

Answer: The electroscope had a negative charge before the experiment started.  When the negatively charged rod comes near the electroscope more electrons are repelled down to the metal pieces and the metal pieces move farther away from each other.

 Step-by-step explanation: First of all, how we know the answer is not A or B is because unlike charges attract each other which means the metal pieces would not spread out. Now that we narrowed it down to C and D we can find the answer, In answer choice D it states that the negatively charged rod attracted the electrons from the electroscope, if that happened then something would happen to the rod, not the electroscope. In answer choice C it says that the rod repels the electrons downward on to the metal pieces, which would cause the metal pieces to spread out since they are both negative. Sorry, I'm not the best with explaining, I hope you understand.

The electroscope had a negative charge before the experiment started.  When the negatively charged rod comes near the electroscope more electrons are repelled down to the metal pieces and the metal pieces move farther away from each other.

What is the effect between two unlike charges and like charges?

There is attraction between unlike charges and repulsion between negative charges.

we know the answer is not A or B is because unlike charges attract each other which means the metal pieces would not spread out.

when  we narrowed it down to C and D we can find the answer, In answer choice D it states that the negatively charged rod attracted the electrons from the electroscope, if that happened then something would happen to the rod, not the electroscope.

for  choice C it is that the rod repels the electrons downward on to the metal pieces, which would cause the metal pieces to spread out since they are both negative.

Therefore the option C is correct.

To learn more  about the charges visit:

https://brainly.com/question/14372859

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