Tolong yang pinter :(​

Jawaban:

k = 9×10⁹ Nm²/C²

F = k Q1 Q2 /r²

1.

F = 9×10⁹ x 6×10⁻⁶ x 12×10⁻⁶ / 0,3²

F = 7,2 N

2.

18 = 9×10⁹ x 8×10⁻⁶ x 10×10⁻⁶ / r²

r = 0,2 m

Penjelasan: