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An electric dipole consists of 1.50g spheres charged to \pm 2.30nC at the ends of a 6.00cm long massless rod. The dipole rotates on a frictionless pivot at its center. The dipole is held perpendicular to a uniform electric field with field strength 980V/m , then released. What is the dipole's angular velocity at the instant it is aligned with the electric field?

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