Two small 0.1g Styrofoam balls are strung like beads on a vertical insulating thread. The lower ball is glued to the thread, but the upper ball is free to move. Imagine that both are given an equal amount of negative charge, so that the upper ball is suspended above the lower ball and their centers are 4.0 cm apart. (Assume that each ball repels the other as if it were a point charge located at its center.) Roughly what fraction of the electrons originally on each ball have been added to each ball? (Hint: Styrofoam is made mostly of atoms having roughly equal numbers of protons and neutrons.)
Two small 0.1g Styrofoam balls are strung like beads on a vertical insulating thread. The lower ball is glued to the thread, but the upper ball is free to move. Imagine that both are given an equal amount of negative charge, so that the upper ball is suspended above the lower ball and their centers are 4.0 cm apart. (Assume that each ball repels the other as if it were a point charge located at its center.) Roughly what fraction of the electrons originally on each ball have been added to each ball? (Hint: Styrofoam is made mostly of atoms having roughly equal numbers of protons and neutrons.)
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter23: Electric Forces
Section: Chapter Questions
Problem 50PQ: Two small spherical conductors are suspended from light-weight vertical insulating threads. The...
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Two small 0.1g Styrofoam balls are strung like beads on a vertical insulating thread. The lower ball is glued to the thread, but the upper ball is free to move. Imagine that both are given an equal amount of negative charge, so that the upper ball is suspended above the lower ball and their centers are 4.0 cm apart. (Assume that each ball repels the other as if it were a point charge located at its center.) Roughly what fraction of the electrons originally on each ball have been added to each ball? (Hint: Styrofoam is made mostly of atoms having roughly equal numbers of protons and neutrons.)
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