v = d2(ρ1-ρ2)g/18η
1 μm = 1 × 10-4 cm
1 g/c.c. = 1 g/cm3
g = 980 cm/s2
1 cps = 0.01 poise = 1 × 10-2 g/(cm·s)
v = [(3 × 10-4)2 × (1.5-1) × 980] / [18 × (1 × 10-2)]
= 2.45 × 10-4 ≒ 2.5 × 10-4
50 含顆粒平均直徑為 3μm 的懸液劑,其顆粒密度為 1.5 g/c.c.,其..-阿摩線上測驗