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Um sistema formado por três cargas puntiformes iguais, colocadas em repouso nos vértices de um triângulo equilátero, tem energia potencial eletrostática igual a
Em seguida, mediante o contato com a bola 2, a primeira pode transmitir para a segunda bola par Duas cargas elétrica puntiformes q1 e q2=4q1 estão fixas nos pontos a e b, distantes 30cm Em que posição (x) deve ser colocada uma carga q3=2q1 para ficar em e Considere dois pontos a e b sobre a reta que passa por q1 e q2, o
Duas partículas de massas m1 e m2= 2m1, e cargas q1 e q2=2q1 são lançadas, com a mesma velocidade, perpendicularmente à direção das linhas de indução de um campo. Determine o ponto ao longo da linha reta que passa através das duas cargas, Quando dois capacitores, de capacitância c(1) e c(2), são ligados a uma bateria, como mostrado na figura abaixo, adquirem cargas q(1) e q(2), respectivamente
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