Particle1: 2C with mass of 7.5g particle2: 4C with mass of 8g A) how do I calculate the potential energy, in joules, if particle Q1 and Q2 are 6cm apart? B) If the two charges are initially separated by a distance of 5 cm. With charge Q1 held in place, charge Q is released from rest. How do I find the speed, in meters per second, of charge Q2 when it is 10 cm from charge Q1