Given:
Surface tension, \( \gamma = 7.0 \times 10^{-2} \, Nm^{-1} \)
Radius of the tube, \( r = 0.4 \, mm = 0.4 \times 10^{-3} \, m \)
Acceleration due to gravity, \( g = 9.8 \, ms^{-2} \)
Using the formula for height of water rise in a capillary tube:
\[ H =
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