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physics

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how far apatr should two electrons be if the electric force each exerts on the other is equal to the weight of an electron ? ( take the mass of an electron to be Me = 9.11 x 10-31 kg ).

  • physics - ,

    Use F=ma to find the weight of an electron, use a=9.8 m/s^2

    use coulombs law

    F=k(Q1Q2)/r^2

    rearrange to

    r^2=k(Q1Q2)/F

    use k=8.99 x 10^9 N m^2/C^2

    and Q1=Q2=1.60x10^-19 C

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