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

Two positive charges, each with a charge of ?=55.0 μC, are held fixed at a distance ?=31.80 cm to either side of a particle of charge ?=−2.50 μC and mass ?=3.90 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 ? of small‑amplitude oscillations of the particle.

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