99 \times 10^9 \, \text{Nm}^2/\text{C}^2\)),
- \(q_1\) and \(q_2\) are the charges (in this case, the charge of a proton, \(1.6 \times 10^{-19} \, \text{C}\)),
- \(r\) is the distance between the charges (in this case, \(1.0 \times 10^{-15} \, \text{m}\)).
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