You have two conducting plates connected to a battery which keeps the potential difference between the plates at 200 V. The plates are slowly brought together until you hear the loud pop that indicates the resulting field has exceeded the "dielectric strength" of air which is 3,000,000 V/m. The dielectric strength of a material is the largest electric field which can be applied before the electrons in the material become separated from the nuclei (thereby breaking down the material). What is the spacing between the plates