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2014-03-25T17:28:23-03:00
F = k*|Q*q|/d²
F = 9*10^9 * 2*10^-6 * 7*10^-6 / 2²
F = 126 * 10^9 * 10^-12 / 4
F = 31,5 * 10^-3
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F = 0,0315N
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