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Capillary Action in Detergency Processes

Two soap bubbles, A and B, are blown from the same solution and carefully brought into contact. Predict the resulting configuration for the following circumstances (a) Ra Rb, (b) Ra = Rb , (c) Ra Rb-Illustrate your predicted results. [Pg.123]

Calculate the rate of shear necessary to separate the two spherical particles bound by van der Waals forces as given in Problem 6.2. The viscosity of the medium is 10 P (poise). [Pg.123]

What pressure in atmospheres would be needed to force water at 25°C through a 1-cm-thick sintered-glass filter with a uniform pore size of 100 nm What would be the force for mercury under the same conditions  [Pg.123]

Two vertical cylindrical glass rods 1 cm in diameter with well polished flat ends are held togethet by a 150-nm-thick layer of water between the two ends. If the water meniscus is semicircular all around the cylinder circumference, what length can the lower cyhnder have before it is detached by gravity from the upper one Assume the density of glass to be 2.5 g cm.  [Pg.124]

The capillary rise method was used to measure the surface tension of a liquid that wetted glass. A glass capillary tube of 0.0200 cm diameter was used and a capillary rise of 10.47 cm was measured. The liquid density was 1.000 g cm . What is the surface tension of the liquid What influence do corrections for the weight and nonsphericity of the meniscus have on the surface tension  [Pg.124]


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