A capillary tube is submerged in a broad vessel filled with water such that the upper end of the tube is above the level of water in the vessel by 2cm . The internal radius of the capillary is 0.5m m . Find the radius of curvature R of a meniscus in the capillary tube. Consider the wetting to be complete, (surface tension of water is 0.075 N/m and g = 10 m/s^2 )