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【简答题】
 在一定温度下,容器中加入适量的、完全不互溶的某油类和水,将一支半径为r的毛细管垂直地固定在油-水界面之间,如图10-3(a)所示,已知水能润湿毛细管壁,油则不能,在与毛细管同样性质的玻璃板上,滴上一小滴水,在水上覆盖上油,这时玻璃的润湿角为θ,如图10-3(b)所示。油和水的密度分别用ρ 油 和ρ 水 表示,AA为油-水界而,油层的深度为h′。请导出水在毛细管中上升的高度h与油-水界面张力γ ow 之间的定量关系式。
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