Final answer:
The student's question involves calculating the distance between two charges using Coulomb's law. Given the charge values and the force, the distance can be found by rearranging the formula and solving for the distance.
Step-by-step explanation:
The student is asking about the distance between two charges where the electrostatic force of attraction is given. To find the distance , we use Coulomb's law which states that the force between two charges and separated by a distance is given by , where is Coulomb's constant (). Given the charges and , and the force , we can rearrange Coulomb's law to solve for : . Therefore, the distance is the square root of <(8.9875 x 10^9 N m^2/C^2 * 23.0 C * 42.0 C) / 6.60 N>.