11. A capillary tube of radius r is dipped in a liquid of density ρ and surface tension S. If the angle of contact is θ, the pressure difference between the two surfaces in the beaker and the capillary (a)(S/r) cos θ (b) (2S/r) cos θ (c) S/r cos θ (d) 2S/r cos θ Ans. b (7) Read More