SHAPE OF LIQUID MENISCUS

Statement I: Small liquid drops assume sphereical shape. Statement II: Due to surface tension liquid drops tend to have minimum surface area.

Statement-1 : In a capillary tube, excess pressure is balanced by hydrostatic pressure and not by weight. And Statement-2 : The vertical height of a liquid column in capillaries of different shapes and sizes will be same if the radius of meniscus remains same.

Statement-1 : If adhesion is greater than cohesion, then the meniscus is concave. And Statement-2 : If adhesion is greater than cohesion, then the liquid will not wet the solid.

A liquid having surface tension T and density rho is in contact with a vertical solid wall. The liquid surface gets curved as shown in the figure. At the bottom the liquid surface is flat. The atmospheric pressure is P_(o) . (i) Find the pressure in the liquid at the top of the meniscus (i.e. at A) (ii) Calculate the difference in height (h) between the bottom and top of the meniscus.

A long glass capillary (radius R) is taken out of liquid (surface tension S and density rho ) in vertical position. Angle of contact everywhere is zero. Atmospheric pressure is P_(0) . It is observed that the capillary retains some liquid. The radius of curvature of meniscus at the bottom of tube is

A capillary of the shape as shown is dipped in a liquid. Contact angle between the liquid and the capillary is 0^@ and effect of liquid inside the mexiscus is to be neglected. T is surface tension of the liquid, r is radius of the meniscus, g is acceleration due to gravity and rho is density of the liquid then height h in equilibrium is:

Show that there is always an excess pressure on the concave side of the meniscus of a liquid. Obtain expression for the excess pressure inside liquid bubble