1. The problem statement, all variables and given/known data A droplet of oil, carrying an extra charge of one electron, is held motionless between parallel plates separated by 1.89 cm, with a potential difference of 39.8 kV. What is the mass of the droplet? 2. Relevant equations E=0.5QV C=Q/V 3. The attempt at a solution Really don't even know how to start here..I figured I would need kinetic energy to find the mass but the velocity is 0, so there would be none.