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 length of liquid column retained in the capillary is
A. `(3 S)/(rho Rg)`
B. `(2S)/(rho Rg)`
C. `(4S)/(rho Rg)`
D. zero

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. B
B. `oo`
C. `R//2`
D. `R//3`