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Find the separation between two electron...

Find the separation between two electron (in`Å`) in vacuum, if electrostatic potential energy between these electrons in `7.67xx10^(-19))J`.
[Given: e= `1.6xx10^(-19)C` `in_(o)=8.85xx10^(-12)` J^(-1)` `C^(2)m^(-1)` pi=3.14]`

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