question_answer

The following observations were taken for determining surface tension of water by capillary tube method: Diameter of capillary,\[D=1.25\times {{10}^{-2}}m\] and rise of water in capillary, \[h=1.45\times {{10}^{-2}}m\]. Taking \[g=9.80m{{s}^{-2}}\]and using the relation \[T\text{ }=\text{ }\left( rgh/2 \right)\times {{10}^{3}}N{{m}^{-1}}\], what is the possible error in surface tension T? (in percentage)

Answer:

1.60