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Determine the magnitude of the electric field at O . The total charge is ?46.9 C, the radius of the semicircle is 39 cm, and

Determine the magnitude of the electric field at O . The total charge is ?46.9 C, the radius of the semicircle is 39 cm, and the Coulomb constant is 8.98755 109 N m 2 /C 2 . Answer in units of N/C.

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Consider a uniformly charged non-conducting semicircular arc with radius r and total nega- tive charge Q. The charge on a small segment with angle 40 is labeled Aq. y AOK A II D - III IV O B

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