Some rocks or bricks contain small air pockets in them and have a spongy structure. Assuming the air spaces form columns of an average diameter of 0.006 mm, determine how high water can rise in such a material. Take the surface tension of the air–water interface in that material to be 0.085 N/m.

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A: Given Density of cube ρc = 0.78 g/cm3 Side of cube a = 10 cm Density of water  ρw = 1.0 g/cm3

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A: The formula for the fraction submerged portion is:

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