Two capillary tubes of different diameters are dipped in water. The rise of water is

• the same in both tubes

• greater in the tube of larger diameter

• greater in the tube of smaller diameter

• independent of the diameter of the tube

Mille is an example for

• emulsion

• inelastic gel

• foam

• elastic gel

Spheres of iron and lead having same mass are completely immersed in water. Density of lead is more than that of iron. Apparent loss of weight is w₁ for iron sphere and w₂ for lead sphere, Then $\frac{{\mathrm{w}}_1}{{\mathrm{w}}_2}$ is

• > 1

• = 1

• become 0 and 1

• = 0

Two solds P and Q float in water. It is observed that P floats with half of its volume immersed and Q floats with $\frac{2}{3}$rd of its volume is immersed. The ratio of densities of P and Q is

• $\frac{4}{3}$

• $\frac{3}{4}$

• $\frac{2}{3}$

• $\frac{3}{2}$

75.

A flow of liquid is streamline, if the Reynold's number is

• less than 1000

• greater than 1000

• between 2000 to 3000

• between 4000 to 5000

An ideal fluid flows through a pipe of circular cross-section with diameters 5 cm and 10 cm as shown in the figure. The ratio of velocities of fluid at A and B is

• 4 : 1

• 1 : 4

• 2 : 1

• 1 : 2

'Hydraulic lift' works on the basis of

• Stoke's Law

• Bernoulli's Law

• Pascal's Law

• Toricelli's Law