The presence of demand gives increase to an electrostatic force: rates exert a power on each other, an effect that was recognized, nevertheless not understood, in antiquity.[twenty five]:?457? A lightweight ball suspended by a fine thread might be billed by touching it having a glass rod which includes alone been billed by rubbing that has a cloth.
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You may not alter the images offered, other than to crop them to size. A credit rating line need to be employed when reproducing visuals; if one particular is not supplied below, credit history the images to "MIT."Using plenty of electrostatic drive about the valence electron--both pushing it with A further adverse charge or attracting it that has