SPH 4U0 Questions: Homework Solutions

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The discussion revolves around confirming the accuracy of answers to two physics homework questions related to charge and force. The first question asks how many excess electrons are needed to create a net charge of 100 µC, with the provided answer being 6.25 x 10^20 electrons. The second question involves determining the distance required for two electrons to experience a repulsive force of 1.0 x 10^-12 N, with the suggested answer being 3 x 10^21 m. Participants emphasize the importance of using the correct equations for both parts and verifying calculations. Accurate understanding of charge interactions and forces is essential for solving these problems correctly.
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Homework Statement



I have a few questions which I have tried myself and have gotten a few answers, but I am unsure if they are right or not. If someone can confirm if I have them right it will be greatly appreciated on my part.

Homework Equations



How many excess electrons are needed to create a net charge of 100 Uc?.

Answer : 6.25 x 10^20 electrons.

2) How far apart must two electrons be in order that they expierience a force of repulsion of 1.0x10^-12 N?.

Answer: 3x10^21 m.

The Attempt at a Solution

 
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Any charge Q = n*e where e is the charge on an electron. Now check your answer.
For part (2) wright down the relevant equation.
 

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