Physics, 07.09.2019 19:20 hellenjones30p0kvtl
(a) how many electrons would have to be removed from a penny to leave it with a charge of +1.0×10−7 c? [4]
(b) to what fraction of the electrons in the penny does this correspond? [6]
[a penny has a mass of 3.11 g; assume it is made entirely of copper.]
Answers: 3
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