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✨ Jawaban Terbaik ✨

靜電力 = kQq/r²
萬有引力 = GMm/r²
比值 = (kQq)/(GMm)
= (9·10⁹ × 1 × 1)/(6.67·10⁻¹¹ × 3 × 3)
= (1/6.67) × 10²⁰
(6.67 ≈ 6.666⋯ = 20/3 ⇒ 1/6.67 ≈ 3/20 = 0.15)
= 1.5 × 10¹⁹

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