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14 February, 05:59

A physicist found that a force of 1.32 N was measured between two charged spheres. The distance between the spheres was 95 cm. Calculate the force between the two spheres when the distance was increased to 1.25 m?

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  1. 14 February, 06:15
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    The electric force (and the gravitational force too) is inversely proportional

    to the square of the distance between the objects involved.

    In this question, the distance is increased by a factor of (1.25/0.95).

    So the electric force will change by the factor of (0.95/1.25) ².

    The new force is

    (1.32 N) · (0.95/1.25) ² = 0.762 ... newton (rounded)
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