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Part A What must the charge (sign and magnitude) of a particle of mass 1.43 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 680 N/C? Use 9.81 m/s2 for the magnitude of the acceleration due to gravity. View Available Hint(s -2.06x10-5 C Correct Part B What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? Use 1.67×10-27 kg for the mass of a proton, 1.60x10-19 for the magnitude of the charge on an electron, and 9.81 m s2 for the magnitude of the acceleration due to gravity. View Available Hint(s) N/C SubmitFigured out the first part and can't figure out the second - please help and show process!

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