The angle of contact for pure water and ...

The angle of contact for pure water and clean glass surface is

`0^(@)`

`180^(@)`

`90^(@)`

`120^(@)`

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The value of the angle of contact for pure water and mercury with the surface of glass respectively-

Water rises up in a glass capillary upto a heigh 10 cm, while mercury falls down by 3.5 cm in the same capillary. If the angles of contact for water-glass and mercury-glass are taken as 0^(@) and 135^(@) respectively, compare the surface tensions of water and mercury. [Given density of water = 10^(3) kg m^(-3) , density of mercury = 13.6 xx 10^(3) kg m^(-3) ]

A long capillary tube of radius 0.2 mm is placed vertically inside a beaker of water. If the tube is now pushed into water so that only 5.0 cm of its length is above the surface, then determine the angle of contact between the liquid and glass surface.

Calculate the rise of water inside a clean glass capillary tube of radius 0.1 mm, when immersed in water of surface tension 7xx10^(-2)N//m. The angle of contact between water and glass is zero, density of water is 1000 kg/ m^(3),g=9.8m//s^(2)

Water rises up in a glass capillary upto a height of 9.0cm , while mercury falls down by 3.4 cm in the same capillary. Assume angles of contact for water glass and mercury glass 0^(@) and 135^(@) respectively. Determine the ratio of surface tension of mercury and water (cos 135^(@)=-0.71) .

The angle of contact of mercury glass surface is

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