The wettability of a surface by a liquid depends primarily on
Question is mentioned below :
A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then
Question is mentioned below :
Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less than ‘h’ then :
The angle of contact between pure water and pure glass, is
The terminal velocity of a small steel ball of radius r falling under gravity through a column of a viscous liquid of coefficient of viscosity η depends on mass of the ball m, acceleration due to gravity g, coefficient of viscosity n and radius r. Which of the following relations is dimensionally correct ?
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is
A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?
