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8.2 A 0.03cm internal diameter glass capillary tube contains gas, oil, and water, thus forming two interfaces, namely, gas-oil and oil-water. The contact angles for

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8.2 A 0.03cm internal diameter glass capillary tube contains gas, oil, and water, thus forming two interfaces, namely, gas-oil and oil-water. The contact angles for these two interfaces are 35 and 25, while the surface and IFTs are 15 and 30mN/m, respectively. Calculate the gas-water capillary pressure

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