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A glass rod is charged to +5.0 nC by rubbing. How many electrons

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A glass rod is charged to +5.0 nC by rubbing. How many electrons have been added?
Submitted: 7 years ago.
Category: Homework
Expert:  Homework Jay replied 7 years ago.
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If the glass rod has gained a positive charge by rubbing then that means it has actually LOST electrons. The answer to your question is that it has not gained any electrons, but has actually transferred electrons to the item it was rubbed with.
Customer: replied 7 years ago.
I understand, however it is asking me how many were lost. The answer is 3.1 x 10^10, but I do not know how to get this number.
Expert:  Homework Jay replied 7 years ago.

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