Two particles are in a uniform electric field whose value is +2500 N/C. The mass and charge of particle 1 are m1 = 1.20 x 10-5 kg and q1 = -6.99C, while the corresponding values for particle 2 are m2 = 2.94 x 10-5 kg and q2 = +18.0C. Initially the particles are at rest. The particles are both located on the same electric field line but are separated from each other by a distance d. When released, they accelerate, but always remain at this same distance from each other. Find d.