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mg - F archimedes - f = 0
(ρ air) g (4/3)πr³ - (ρ udara) g (4/3)πr³ - 6π r v η = 0
(1000)(10)(4/3)(0.2/1000)³ - (1.3) (10)(4/3)(0.2/1000)³ - 6 (0.2/1000) v (2 * 10^-5) = 0
v = 4.44 m/s <---
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