A long thin walled capillary tube of mass M and radius r is partially immersed in a liquid of surface tension T. The angle of contact for the liquid and the tube wall is `30^(@)`. How much force is needed to hold the tube vertically? Neglect buoyancy force on the tube.

A long capillary tube of mass pi gm, radisu 2mm and negligible thickness, is partially immersed in a liquid of surface tension 0.1(N)/(m) . Take angle of contact zero and neglect buoyant force of liquid. The force required to hold the tube vertically, will be (g=10(m)/(s^2) )

A capillary tube of radius r is lowered into a liquid of surface tension T and density rho . Given angle of contact =0^(@) . The work done by surface tension will be

When a liquid rises in a capillary tube angle of contact will be

A capillary tube of radius r is placed in a liquid I the angle of contact is theta , the radius of curvature R of the meniscus in the capillary is