40 pts jill rubs two latex balloons against her hair, causing the balloons to become charged negatively with 2.06 x 10 ^16 c. she holds them a distance of 0.70 m apart. what is the electric force between the two balloons show work!

The electrostatic force between two charged objects is given by:

where
k is the Coulomb's constant
q1 and q2 are the charges of the two objects
r is their separation

In this problem, the charge of each balloon is  and their separation is , therefore the electrostatic force between the balloons is

and the force is repulsive, since the two balloons have same sign charge.