Define surface tension and angle of contact.

A mosquito with 8 legs stands on water surface and each leg makes depression of radius 'a'. If the surface tension and angle of contact are 'T' and zero respectively, then the weight of mosquito is:

When the temperature of a liquid is increased , following changes take place in the surface tension (T) and angle of contact (theta)

Two parallel glass plates are dipped partly in the liquid of denstiy 'd' keeping them vertical. If the distance between the plates is 'x', Surface tension is T and angle of contact is theta then ries of liquid between the plates due to capillary will be

Check the correctness of the relation h =(2 sigma cos theta)/(r^2 dg), where h is height , sigam is surface tension, theta is angle of contact, r is radius, d is density and g in acceleration due to gravity.

A capillary tube of inner diameter 0.5 mm is dipped in a liquid of specific gravity 13.6 and having surface tension 545 dyn/cm(angle of contact 130^(@) ) . Find the depression or elevation in the tube .

Define surface tension and surface energy. Write units and dimensions of surface tension. Also prove that surface energy is numerically equal to the surface tension.

Define surface tension and surface energy. Obtain a relation between them.

The angle of contact between glass and water is 0^@ and water (surface tension 70 dyn//cm ) rises in a glass capillary up to 6 cm . Another liquid of surface tension 140 dyn//cm , angle of contact 60^@ and relative density 2 will rise in the same capillary up to