Question

Derive an expression for rise of

liquid in a capillary tube (Ascent formula)​

Answer 1

Answer:

Let 'r' be the radius of capillary tube, 'R' be the radius of meniscus and 'θ' the angle of contact. In figure (i), X is in atmosphere, Z is at the interface of mercury and atmosphere and Y is on convex side of meniscus. Therefore, pressure at X and Z is equal and is equal to the atmospheric pressure.

Explanation:

Answer 2

Answer:

Let 'r' be the radius of capillary tube, 'R' be the radius of meniscus and 'θ' the angle of contact. In figure (i), X is in atmosphere, Z is at the interface of mercury and atmosphere and Y is on convex side of meniscus. Therefore, pressure at X and Z is equal and is equal to the atmospheric pressure.