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BaoZhu

  • 11 months ago

One way to write Coulomb's law is F=(k lQql)/(r^2) where F is the magnitude of the electric force, k is a constant, Q and q are the two electrical charges and r is the distance between them. Solve Coulomb's law for r.

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  1. douglaswinslowcooper
    • 11 months ago
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    Multiply both sides by r^2, to get it on the left. Divide both by F, to get it on the right. r^2 = etc. r = sqrt(etc.) you should finish it.

  2. BaoZhu
    • 11 months ago
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    i did it, and it gave me r=+,-(sqrt(k(Qq))/(sqrt(F)), however, the system still reads it as incorrect, is there i'm missing with the absolute value of “Qq”?

  3. douglaswinslowcooper
    • 11 months ago
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    r cannot be negative as it is a distance. Did you use |Qq| or (Qq)? Former is needed.

  4. BaoZhu
    • 11 months ago
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    i can not use capital Q, because wileyplus(the software) do not allow me to.

  5. BaoZhu
    • 11 months ago
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  6. douglaswinslowcooper
    • 11 months ago
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    You have the right formula for the answer.

  7. BaoZhu
    • 11 months ago
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    so, it's the system itself that is not accepting the answer?and not that my answer is incorrect?

  8. RaphaelFilgueiras
    • 11 months ago
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    you forget the modulus inside sqrt

  9. BaoZhu
    • 11 months ago
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    so there it should be absolute value of q1q2?

  10. RaphaelFilgueiras
    • 11 months ago
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    yes , imagine ,if the value of product were negative will give you an complex radius

  11. BaoZhu
    • 11 months ago
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  12. BaoZhu
    • 11 months ago
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    will that be the answer? sorry about all the questions, i don't want to submit the answer before it is right since i only have 1 more attempt left.

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