Two tiny, spherical water drops, with identical charges of -6.19 × 10-16 C, have a center-to-center separation of 1.22 cm. (a) What is the magnitude of the electrostatic force acting between them? (b) How many excess electrons are on each drop, giving it its charge imbalance?

a

b

Explanation:

From the question we are told that

   The  charge on each water drop is  

   The  distance of separation is    

Generally the electrostatic force between the water drops is mathematically represented as

Here  k is the coulombs constant with value  

So  

Generally the quantity of charge is mathematically represented as

Here n is the number of electron present

and  e is the charge on one electron with value  

    So

increase masses, decrease separation