Explain why
The angle of contact of mercury with glass is obtuse. While that of water with glass is acute .

Water rises a height of 10 cm in a capillary tube. When the same capillary tube is dipped in mercury it falls to a height of 3.4cm. Compare the surface tensions of water and mercury. Assume that the specific gravity of mercury is 13.6, angle of contact of water with glass is 0^(@) and angle of contact of water with glass is 135^(@) .

Mercury sticks to glass when it comes in contact with

Two parallel glass plates are dipped perpendicularly in a liquid of density rho . The separation between the plates is ‘d' and the surface tension T. The angle of contact of glass is theta . The capillary rise of the liquid between the plates is

A long capillary tube of radius 0.2mm is placed vertically inside a beaker of water If the surface tension of water is 7.2 xx 10^(-7) N/m and the angle of contact between glass and water is zero. Then determine the height of the water column in the tube

The above 3 Figures (a) and (b) show refraction of a ray in air incident at 60^(@) with the normal to a glass - air and water-air figures interface respectively. Predict the angle of refraction in glass when the angle of incidence in water is 45^(@) with the normal to a water - glass interface [Fig. (c) ]