05 µC charge placed at point X is given by Coulomb's law:
$$F = k \frac{q_1 q_2}{r^2}$$
where:
* k is Coulomb's constant, 8.98755 × 10^9 N⋅m^2/C^2
* q1 is the charge of Q1, +1.15 µC
* q2 is the charge of the test charge, +1.05 µC
* r is the distance between Q1 and
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