Final answer:
The electrostatic force between two charged objects can be calculated using Coulomb's law which is A)
![9.76 x 10^-11 N](https://img.qammunity.org/2022/formulas/physics/high-school/n42sji6738hyouazbcq0gn2jp2qqzfo4my.png)
Step-by-step explanation:
The electrostatic force between two charged objects can be calculated using Coulomb's law:
![F = k * (q1 * q2) / r^2](https://img.qammunity.org/2022/formulas/physics/high-school/cwidgx93zmbb70gwx936u6ztnoe229zetn.png)
Where F is the electrostatic force, k is the electrostatic constant
q1 and q2 are the charges of the objects, and r is the distance between them.
Plugging in the values from the question, we get:
F =
![(9 x 10^9 Nm^2/C^2) * ((-2.3 x 10^-6 C) * (-4.2 x 10^-6 C)) / (0.099 m)^2](https://img.qammunity.org/2022/formulas/physics/high-school/25sjuxuegor7jrdu3xw8d9mb0zxadbb3zi.png)
= 9.76 x 10^-11 N
So the correct answer is A)
![9.76 x 10^-11 N.](https://img.qammunity.org/2022/formulas/physics/high-school/l3lbd69cjngl9tc447jdya9podes3800c0.png)