Question

Assertion: When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow. Reason: Product of radius of meniscus and height of liquid in capillary tube always remains constant.

The sap in trees, which consists mainly of water in summer, rises in a system of capillaries of radius r = 2.5 × 10⁻⁵ m. The surface tension of sap is T = 7.28 × 10⁻² N/m and the angle of contact is 0°. Does surface tension alone account for the supply of water to the top of all trees?(density 10³ kg/m³)