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At what separation should two equal char...

At what separation should two equal charges 1.0 C each, be placed so that the force between them equals the weight of a 50 kg person?

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`q=1.C `
Let distance be x
` F=50*9.8=490 `
` or 490=9*10^9*(1)/x^2 `
` or x=4.3*10^3m`
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