1. The problem statement, all variables and given/known data A defibrillator is used to restart a person's heart after it stops beating. Energy is delivered to the heart by discharging a capacitor through the body tissues near the heart. If the capacitance of the defibrillator is 9 ìF and the energy delivered is to be 300 J, to what potential difference must the capacitor be charged? 2. Relevant equations U = 1/2C(delta V)^2. 3. The attempt at a solution Could someone get me started on this problem?