Part 1

A liquid drop having surface energy ‘E’ is spread into 512 droplets of same size. The final surface energy of the droplets is A liquid drop having surface energy 'E' is spread into 512 droplets of same size. The final surface energy of the droplets is September 20, 2020 Category: Chapter 13 - Fluid Mechanics [...]

In a capillary tube of radius ‘R’, a straight thin metal wire of radius ‘r’ (R > r) is inserted symmetrically and one end of the combination is dipped vertically in water such that the lower end of the combination is at same level. The rise of water in the capillary tube is [T = [...]

If T is the surface tension of the liquid, the change in surface energy by splitting a liquid drop of radius R into 125 droplets of radius r is If T is the surface tension of the liquid the change in surface energy by splitting a liquid drop of radius R into 125 droplets of [...]

When one end of the capillary is dipped in water, the height of water column is h. The upward force of 105 dyne due to surface tension is balanced by the force due to the weight of water column. The inner circumference of the capillary is (Surface tension of water =7×10^−2N/m) A drop of water [...]

A big water drop is formed by the combination of ′n′ small water drops of equal radii. The ratio of the surface energy of ′n′ drops to the surface energy of big drop is. A big water drop is formed by the combination of ′n′ small water drops of equal radii. The ratio of the [...]

A sphere of radius R is gently dropped into liquid of viscosity(n) ‘ita’ in a vertical uniform tube. It attains a terminal velocity v. Another sphere of radius 2 R when dropped into the same liquid, will attain its terminal velocity A sphere of radius R is gently dropped into liquid of viscosity(n) 'ita' in [...]

Two spheres of equal masses but radii r1 and r2 are allowed to fall in a liquid of infinite column. The ratio of their terminal velocities are Two spheres of equal masses but radii r1 and r2 are allowed to fall in a liquid of infinite column. The ratio of their terminal velocities are September [...]

Two small spheres of radii r and 4r fall through a viscous liquid with the same terminal velocity. The ratio between the viscous forces acting on them is. Two small spheres of radii r and 4r fall through a viscous liquid with the same terminal velocity. The ratio between the viscous forces acting on them [...]

When water flows at a rate Q through a tube of radius r placed horizontally ,a pressure difference p develops across the ends of the tube. if the radius of the tube is doubled and rate of flow halved ,the pressure difference will be a pressure difference p develops across the ends of the tube. [...]

Neglecting the density of air, the terminal velocity obtained by a raindrop of radius 0.3 mm falling through air of viscosity 1.8×10^−5 Nsm ^−2 will be: Neglecting the density of air the terminal velocity obtained by a raindrop of radius 0.3 mm falling through air of viscosity 1.8×10^−5 Nsm ^−2 will be: September 20, 2020 [...]