Hi, I have no idea of how to do the following problem and what formulas I should use. Please help! Thank you. A spherical balloon has a conductive coating and we propose to inflate the balloon to a diameter of 0.1 meters by connecting the surface to a high voltage source. Suppose that the maximum practical electric field at the surface is 2 x 10^6 volts/meter (in air, just before breakdown of air molecules). What is the largest voltage we can apply, and what is the outward pressure (N/meters^2)? How many atmospheres is this?