P23_061 - 61(a Using the density of water = 1000 kg/m3 the...

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61. (a) Using the density of water ( ρ = 1000 kg / m 3 ), the weight mg of the spherical drop (of radius r =6 . 0 × 10 7 m) is W = ρV g = ( 1000 kg / m 3 ) µ 4 π 3 (6 . 0 × 10 7 m) 3 ( 9 . 8m / s 2 ) =8 . 87 × 10 15 N . (b) Vertical equilibrium of forces leads to
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