Respostas

2014-02-20T14:41:58-03:00
Resposta

F = k . q.q /d²

202,5 = 9.10^9 .q² /2²

202,5 = 9.10^9q² /4

9.10^9q² = 4 . 202,5

9.10^9q² = 810

q² = 810 /9.10^9

q² = 90.10^-9

q² = 9.10^-10

q = √9.10^-10

q = 3.10^{-5} C
2 5 2