Answer
$8.22\times 10^{-8}N$
Work Step by Step
We know that
$F=\frac{Ke^2}{r^2}$
We plug in the known values to obtain:
$F=\frac{(8.99\times 10^9)(1.60\times 10^{-19})^2}{(5.29\times 10^{-11})^2}$
$F=8.22\times 10^{-8}N$
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