1. The problem statement, all variables and given/known data A soap bubble of radius 0.1mm has a wall thickness of 3.3x10^-8m, and is charged to a potential of 100V. Give a formula for the charge of the bubble. I know this is probably a really easy question, but I've only ever done problems with spheres of negligible wall thickness, so not sure if the wall makes a difference. I know the equation for potential, so I could just rearrange that to get get Q. Any help is appreciated, cheers.