Respostas

  • Usuário do Brainly
2014-07-11T10:51:57-03:00
V= Ep / Q
Ep=Q.V

V=K.Q / d

Ep= K . Q . Q / d
Ep = K.Q²/d
25.10⁴ = 9.10⁹ .Q²/ 0,9
Q²=22,5.10
⁴ / 9.10⁹
Q²=2,5.10-⁵ C
Q=0,005 C
Q=5.10-³ C
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