A capillary tube of diameter 2 mm is dipped in a liquid of specific gravity 0.8. The liquid rises in tube by 15 mm making an angle of contact of zero with the tube. Determine the surface tension of the liquid in contact with air and glass tube.
1
1 kN/m
2
0.05 kN/m
3
0.06 N/m
4
More than one of the above
5
None of the above