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aajlarov
21.06.2021 08:39
Физика
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Vital Alpha Testo- *Must* Read Review Before Order

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milkyyyw
milkyyyw
4,8(95 оценок)
При равновесии положительная энергия кулоновского отталкивания зарядов (е1) компенсируется отрицательной энергией их притяжения (е2). очевидно, что e1 = 3*q^2/a (где а - длина стороны треугольника, q - заряд 9 нкл) . с другой стороны, e2 = -9*q*q/a*sqrt(3) (где q - отрицательный заряд в центре треугольника) .  тогда из условия е1 = е2 имеем q = -q*sqrt(3)/3.

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