A capillary tube of radius 0.1 mm is partly dipped in water (surface tension $70 \mathrm{dyn} / \mathrm{cm}$ and glass water contact angle $\approx 0^{\circ}$ ) with $30^{\circ}$ inclined with the vertical. The length of water risen in the capillary is $\mathrm{cm} .\left(\right.$ Take $\left.\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2\right)$