Rearrange the coulomb's law formula to find distance(r)

distance in terms of force is given as

Explanation:

here as we know that the force between two charges placed at distance "r" is given by Coulomb's law

It is given by the formula

now we have to rearrange it for finding the distance

so here we will multiply both sides by square of the distance

now we will divide both sides force "f"

now square root both sides

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

im sorry i dont know