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16 July, 03:51

How much work must be done to bring three electrons from a great distance apart to 3.5*10-10 m from one another (at the corners of an equilateral triangle) ?

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  1. 16 July, 04:12
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    1.97 * 10⁻¹⁸J

    Explanation:

    Charge of an electron q = - 1.9 * 10⁻¹⁹C

    Length of one side of the equilateral triangle at whose corners electrons are placed d = 3.5 * 10⁻¹⁰m

    Coulomb constant k = 8.99 * 10⁹Nm²/C²

    electrostatic potential = (3 kq²) / d

    = (3 * 8.99 * 10⁹ * (-1.6 * 10⁻¹⁹) ²) / 3.5 * 10⁻¹⁰

    = 1.97 * 10¹⁸J
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