Surface tension (capillary rise method)

In experiment for measuring surface tension by capillary rise method, reading for positions A, B, C and D for internal diameter of capillary tube are given as under Mean internal radius of capillary is

Surface tension is

The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary , D = 1.25 xx 10^(-2) m and rise of water in capillary , h = 1.45 xx 10^(-2) m . Taking g = 9.80 m s^(-2) and using the relation T = ( r gh//2) xx 10^(3) N m^(-1) , what is the possible error in measurement of surface tension T ? (a) 2.4% (b) 15% (c) 1.6% (d) 0.15%

The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary , D = 1.25 xx 10^(-2) m and rise of water in capillary , h = 1.45 xx 10^(-2) m . Taking g = 9.80 m s^(-2) and using the relation T = ( r gh//2) xx 10^(3) N m^(-1) , what is the possible error in measurement of surface tension T ? (a) 2.4% (b) 15% (c) 1.6% (d) 0.15%

The dependency of speed of water surface waves (capillary waves) on the density of water (rho) their wavelength (lambda) and surface tension (gamma) is -

Derive an expression for the height of capillary rise between two parrallel plates dipping in a liquid of density sigma separated by a distance d . The surface tension of the liquid is T .

A capillary tube of radius 0.6 mm is dipped vertically in a liquid of surface tension 0.04 Nm^(-1) and relative density 0.8 . Calculate the height of capillary rise if the angle of contact is 15^(@) .

A number of droplets, each of radius r , combine to form a drop of radius R . If T is the surface tension, the rise in temperature will be

In a device designed by Academician Rebinder the surface tension is determnined from the pressure difference required to form a bubble of air at the end of a capillary immersed in the liquid being investigated (fig). Calculated the surface tension if the radius of the capillary is r = 1 mm and the difference in the pressures during bubble formation is DeltaP = 14 mm of water column. The end of the capillary is near the surface of the liquid.

Three liquids of densities rho_(1), rho_(2) and rho_(3) (with rho_(1) gt rho_(2) gt rho_(3) ), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact theta_(1), theta_(2) and theta_(3) obey