Pith Balls

Pith Balls

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This image is part of the sequence Science and technology: Pith ball

Credit: GIPHOTOSTOCK/SCIENCE PHOTO LIBRARY

Caption: Pith balls. Two pith balls are suspended by a silk threads from a non-conductive stand. When they are not charged, they hang down loosely and touch each other (not seen). When the pith balls are charged by touching a charged object, they have the same polarity charge and repel each other (seen here). The distance between the balls is determined by the amount of the charge.

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Keywords: charge, demo, demonstration, education, educational, effect, electric, electricity, electroscope, electrostatic, experiment, force, lab, phenomenon, photo sequence, photo series, physics, pith, pith ball, pith balls, repel, repulsion, scientific, sequence, sequential, serial, series, static, still life, time lapse, time-lapse

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