Physics

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At a place directly below a thundercloud, the induced electric charge on the surface of the Earth is +1.0 X 〖10〗^(-7) coulomb per square meter of surface. How many singly charged positive ions per square meter does this represent? The number of atoms on the surface of a solid is typically 2.0 X 〖10〗^19 per square meter. What fraction of these atoms must be ions to account for the above electric charge?

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