99 \times 10^9 \, \text{N m}^2/\text{C}^2 \)),
- \( q_1 \) and \( q_2 \) are the charges of the particles,
- \( r \) is the distance between the charges.
Given:
- \( q_1 = +9e = +9 \times 1.6 \times 10^{-19} \, \text{C} = 1.44 \times 10^{-18} \, \text{C} \)
- \(
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