Two capillary tubes of same diameter are dipped in two liquids A and B having densities $\rho_A$ and $\rho_B$ ($\rho_A > \rho_B$) and surface tensions $T_A$ and $T_B$ ($T_A < T_B$) respectively. If the angles of contact are same, then:

A water film is made between two straight parallel wires of length 10 cm separated by 5 mm from each other. If the distance between the wires is increased by 2 mm. How much work will be done? Surface tension for water is $72{\rm{dyne c}}{{\rm{m}}^{ - 1}}$

Three liquids with densities $\rho_1$, $\rho_2$, and $\rho_3$ (where $\rho_1 > \rho_2 > \rho_3$) have the same surface tension T. They rise to the same height h in identical capillaries. How are their angles of contact $heta_1$, $heta_2$, and $heta_3$ related?

A soap bubble A radius 0.03 m and another bubble B of radius 0.04 m are brought together so that the combined bubble has a common interface of radius r, then the value of r is

When two soap bubbles of radius ${r_1}$ and {r_2}({r_2} &gt; {r_1}) coalesce, the radius of curvature of common surface is

A soap film is made by dipping a circular frame of radius $b$ in soap solution. A bubble is formed by blowing air with speed $v$ in the form of cylinder. The radius of the bubble formed $R \gg b$ so that the air is incident normally on the surface of bubble. Air stops after striking surface of soap bubble. Density of air is $\rho$. The radius $R$ of the bubble when the soap bubble separates from the ring is (surface tension of liquid is $S$)

Determine the energy stored in the surface of a soap bubble of radius 2.1 cm if its surface tension is $4.5 imes {10^{ - 2}}{\rm{N}}{{\rm{m}}^{ - 1}}$

The phenomenon of capillarity is due to:

Two capillary tubes of radii 0.2 mm and 0.4 mm are dipped vertically in water. The difference in the heights of the water level in the two tubes is $h_1$. If the two tubes are dipped in a liquid of surface tension $\frac{2}{3}$ that of water and density twice that of water, the difference in height of the liquid in the two tubes is $h_2$. The ratio $\frac{h_1}{h_2}$ is:

A capillary tube of radius $r$ is immersed in water. The mass of water rising in the tube is $m$. If a tube of radius $4r$ is immersed in a liquid with twice the surface tension and half the density of water, the mass of liquid rising in this tube, assuming the contact angle remains the same, is:

Which of the following is an example of capillarity?