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What is the force between two charged spheres 1.25 cm apart if the charge on one sphere is 2.50 C and the charge on other sphere is 1.75 X 10^-8 C

  • physics -

    Is there some failure of Coulomb's law here?

    F=kQQ/r^2

  • physics -

    The two Q's in the Coulomb equation are different in this case.
    Call them
    Q1 = 2.50 C and
    Q2 = 1.75 * 10^-8 C .

    I think you may have left out an exponent on Q1. 2.5 C is enough for a major lightning strike.

    You may need to convert r to meters, depending upon which units
    you use for k.

  • physics -

    how long did it take 4 u 2 knw physics

  • physics -

    r is equal 1.25cm

  • physics -

    A charge of 4.10 is placed at each corner of a square 0.100 on a side.
    Determine the magnitude of the force on each charge.
    Determine the direction of the force on each charge. Assume that the positive x-axis is directed to the right.

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