Apositive and a negative charge, each with a magnitude of 1.41 x 10^-5 c, are separated by a distance of 0.44 m. find the force on each of the particles.

For this question, we use the Coulumb's law to calculate the force on each particles. In this law, force between point charges are said to be proportional to product of each charge and is  indirectly proportional to the distance of both charges. We do as follows:

F= kq(1)q(2)/d^2 
  = (9x10^9).(1.41 x 10^-5 C).(-1.41 x 10^-5 C)/.44^2 
  = 4.067 N