alexandre704 05/05/2016 5. F = K.Q.q/d² F = 9.10^9 . 5.10^-5 . 0,3.10^-6 / 0,05² F = 13,5 . 10^-2 / 0,0025 F = 5,4.10^3 . 10^-2 F = 5,4.10^1 -> 54 N // 6. F = K.Q²/d² 202,5 = 9.10^9 . Q² / 2² 810 = 9.10^9 . Q² Q² = 810 / 9.10^9 Q² = 90.10^-9 Q² = 900.10^-10 Q = 30.10^-5 -> 3.10^-6 C -> 3uC //
alexandre704
5.
F = K.Q.q/d²
F = 9.10^9 . 5.10^-5 . 0,3.10^-6 / 0,05²
F = 13,5 . 10^-2 / 0,0025
F = 5,4.10^3 . 10^-2
F = 5,4.10^1 -> 54 N //
6.
F = K.Q²/d²
202,5 = 9.10^9 . Q² / 2²
810 = 9.10^9 . Q²
Q² = 810 / 9.10^9
Q² = 90.10^-9
Q² = 900.10^-10
Q = 30.10^-5 -> 3.10^-6 C -> 3uC //