Respostas

2014-03-13T09:00:42-03:00
F=9X10^9X3X10^6.2X10^6= 54X10^3= 13,5X10^1
                 (2X10^1)2          4X10^2

2014-03-13T09:28:44-03:00
Resposta


F = k.Q1.Q2 /d²

F = 9.10⁹.3.10⁻⁶.2.10⁻⁶ /0,2²

F = 54.10⁻³ / 0,04

F = 1350.10⁻³

F = 1,35N