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Two positive charges, each with a charge of ?=55.0 μC, Q=55.0 μC, are held fixed at...

Two positive charges, each with a charge of ?=55.0 μC, Q=55.0 μC, are held fixed at a distance ?=21.00 cm L=21.00 cm to either side of a particle of charge ?=−4.50 μC q=−4.50 μC and mass ?=4.50 g. m=4.50 g. This particle is constrained to move along a vertical frictionless wire halfway between the two charges, as indicated in the figure. Neglecting any gravitational effects, determine the frequency ? f of small‑amplitude oscillations of the particle.

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