The liquid (mercury) meniscus in a capillary | vedclass

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(A) The shape of the liquid meniscus in a capillary tube is determined by the angle of contact $	heta$ between the liquid and the solid surface.If th

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greater than $90^{\circ}$

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(A) The shape of the liquid meniscus in a capillary tube is determined by the angle of contact $	heta$ between the liquid and the solid surface.If the angle of contact $	heta$ is acute $(	heta If the angle of contact $	heta$ is obtuse $(	heta > 90^{\circ})$,the liquid does not wet the surface,and the meniscus is convex (e.g.,mercury in glass).Therefore,for the meniscus to be convex,the angle of contact must be greater than $90^{\circ}$.

The liquid (mercury) meniscus in a capillary tube will be convex if the angle of contact is

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