Physics (Electric fields and Coulomb's Law)

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I need help with this question please.

An ion harvester is scouring deep space for isolated xenon (Xe+) ions. A xenon ion is singly ionized, and has a charge of +e. If the field meter reads 0.000000202 N/C, how far away is it from the ion?
_________ m
Thank you

  • Physics (Electric fields and Coulomb's Law) -

    E = kQ/R^2 = 202*10^-9 N/C

    Q = +e = 1.6*10^-19 C
    k is the Coulomb constant
    Solve for R

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