tolong dijawab ya pliss !!! pr buat besok ... terimakasih banyak yg udah jawab ☺

LISTRIK STATIS
• gaya

Q₁ = 9×10⁶ C
F = 100 = 10² N
r = 3×10⁻² m
Q₂ = ___ ?

F = k Q₁ Q₂ / r²
10² = 9×10⁹ • 9×10⁶ • Q₂ / (3×10⁻²)²
10² = 9×10⁹⁺⁶⁺⁴ • Q₂
10² = 9×10¹⁹ • Q₂
1 = 9×10¹⁷ • Q₂
Q₂ = ¹/₉ × 10⁻¹⁷ C
Q₂ = 1,1×10⁻¹⁸ C