The electric force can be calculated using the formula:
\[ F = \frac{k \cdot |q_1 \cdot q_2|}{r^2} \]
Where:
\( k = 8.99 \times 10^9 \, \text{N} \cdot \text{m}^2/\text{C}^2 \) (Coulomb's constant)
\( q_1 = 1.0 \times 10^{-9} \, \text{C} \) (charge of the glass
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