Respostas

2014-02-20T14:57:29-03:00
Resposta

d = 10cm = 0,1m

F = k.Q.q/d²

F = 9.10^9 . 3,0.10^-9 . 3,0.10^-9 /0,1²

F = 81.10^-9/0,01

F = 8100.10^-9

F = 8,1.10^-6 N