Question: 4 . ( 1 5 points ) Consider a capillary tube with oil floating on top of the water surface. The relative wettabilities are water

4 . (15

points

)

Consider a capillary tube with oil floating on top of the water surface. The relative wettabilities are water

\ (> \)

oil

\ (> \)

air in a glass tube. Assume all the fluids are perfectly wetting and that the air is at zero gauge pressure. Write an expression for the pressure of each fluid interface, beginning from the water table and moving upwards. Solve for the height of rise of water up the tube. What would the height of rise of water be if there were no oil present?

4 . ( 1 5 points ) Consider a capillary tube with

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