The following observations were taken for determining surface tension T of water by capillary method:
diameter of capillary, D = 1.25 $\times 10
-2
m
rise of water, h = 1.45 \times 10
-2
m
Using g = 9.80 m/s
2
and the simplified relation T = {{rhg} \over 2} \times {10^3}N/m$, the possible error in surface tension is closest to :
