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physics coulombs law

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a negative charge 5.0 X 10^-4 C exerts a repulstio force of 7.0 N .on second charge away 0.05 m away.
what is the sign and magnitude of the second charge

  • physics coulombs -

    find the force exerted by proton and the electron in a hydrogen atom they are 5.0 X 10^-19 coulomb

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