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See the attached photo

 

 Sep 18, 2020
 #1
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You are given the law and all of the variables....just plug in and compute

 

9 x10^9  *  4.2 x a0^-9  *  1.10 x 10 ^-9  / (.005)^2 = ........ Newtons

 Sep 18, 2020

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