Respostas

2014-05-23T19:35:13-03:00
1m ------- 1000 mm
xm--------- 1 mm

x = 1.10⁻³ m

Lei de Coulomb : F=  \frac{Ko. Q.Q.}{d^2}

K ~> 9.10⁹

3,6=  \frac{9.10^9. Q^2.}{(1.10^-^3)^2}

0,0036.10^-^3 =  9.10^9. Q^2

  Q^2 =  \frac{0,0036.10^-^3 }{9.10^9}

Q =  \sqrt{4.10^-^1^6}  = 2.10^-^8C