Chapter 13 – Fluid Mechanics

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 [...]

Two metal Spheres are falling through a liquid of density 2 × 10^3 kg / m^3 with the same uniform speed the metrical density at sphere 1 and sphere 2 are 8 × 10^3 (kg / m^3) and 11 × 10^3 (kg / m^3) respectively. The ration of their radii is. A drop of water [...]

The terminal velocity of a raindrop of radius r is 2 cm/s. If eight is such identical drops combine to form a single large drop, the terminal velocity would be The terminal velocity of a raindrop of radius r is 2 cm/s. If eight is such identical drops combine to form a single large drop [...]

A spherical solid ball of volume V is made of a material of density ρ1 It is falling through a liquid of density ρ1(ρ2 A spherical solid ball of volume V is made of a material of density ρ1 It is falling through a liquid of density ρ1(ρ2 September 20, 2020 Category: Chapter 13 - [...]