Question

Will capillary rise occur and if it occurs what will be capillary rise if glass capillarity tube is immersed in water and experiment is carried out by astronauts in space.

(a) Capillarity rise will not occur

(b) Capillarity rise will occur infinitely and will come out in form of fountain

(c) Capillarity rise will occur finitely and will be the whole length of tube

(d) None of the mentioned

This question was posed to me in an online interview.

The above asked question is from Surface Tension, Capillarity, Vapour Pressure and Cavitation in section Properties of Fluids of Fluid Mechanics

Answer 1

Right option is (c) Capillarity rise will occur finitely and will be the whole length of tube

Easiest explanation: Capillary rise is given by

                    h=4*cosθ*σ/ρ*g*d

hence rise is inversely proportional to g

In space g is 0 m/s2

Hence, capillarity rise will occur finitely and will be the whole length of tube.