Titlebook: General Properties of Matter; B. Brown Book 1969 Springer Science+Business Media New York 1969 astronomy.physics

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Surface Tension,e expected to become a flat surface. All liquids behave in this manner and it is usual to explain such behaviour on the basis of the molecular forces existing between the constituent molecules of the liquid.

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Hydrodynamics,e motion in space be opposed by obstacles so that, on considering an area perpendicular to the direction of motion, the space available for the passage of the entity is less than if there were no obstacles and let ., the permeability, be a measure of the obstruction, i.e. . is the ratio of the areas available with and without the obstruction.

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Viscosity,ithout turbulence over a fixed surface . (.). Experimentally, it is found that a layer of the fluid at ., at a distance . + d. from ., moves with a velocity . + d. greater than that of a layer of the fluid at ., at a distance x from ., which moves with velocity . The velocity gradient between the layers . and . is thus d./d..

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