Calculating Electrons for 4.00nC Negative Charge

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Homework Help Overview

The discussion revolves around calculating the number of electrons needed to achieve a specific negative charge of 4.00 nC. The subject area is electrostatics, focusing on charge quantification and electron transfer.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the number of electrons by dividing the total charge by the charge of a single electron. Some participants question the validity of the book's answer and suggest that the original poster's method appears correct.

Discussion Status

The discussion is ongoing, with some participants expressing confidence in the original poster's approach while questioning the accuracy of the book's answer. There is a sense of exploration regarding potential discrepancies between the problem and the provided solutions.

Contextual Notes

Participants note that textbooks may have errors or inconsistencies, particularly between editions, which could affect the answers provided. The original poster expresses uncertainty about the negative charge aspect and its impact on the calculation.

Magna1
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THe question is.
How many electrons must be transferred to a body to give it a negative charge of 4.00nC.?/
So going with what I think 4*10^-9/1.602189...*10^-19=
=25*10^9.
BUT the answer in my book. is 390*10^-9.
What am I missing. Is this negative thing screwing me up or is the answer in my book wrong?
I Can't find anywhere in my book that helps.
 
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Your method and answer seem correct. The book's answer is silly. :smile:
 
OFten what happens: a book will change their problems slightly when a new edition is made, but sometimes they forget to change the selected answers in the back.
 
Thanks

Hopefuly that was it. Cause I went into my test today with the way I was doing it, Forget the book maybe I should just ask you guys.
Thanks
 

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