According to coulomb’s law, what is the relationship between the electrical force and the separation between two charged objects

Coulomb's law says: F = where F is the force, q1 and q2 are the charge of both objects, k is a constant and r is the distance between the objects.

Here you can see that the relation between the electrical force and the separation between two charged objects is a inverse squared relationship.

so F is proportional to , meaning that if r crease, then F must decrease (which has a lot of sense).

the doppler effect is used by weather forecasters to measure 

moving clouds