If a section of a soap bubble (of radius $R$) through its center is considered, then the force on one half due to surface tension is

$A$ wire of length $10 \text{ cm}$ is gently placed horizontally on the surface of water having surface tension of $75 \times 10^{-3} \text{ N/m}$. What force is required to just pull up the wire from the water surface?

The surface tension of most of the liquids decreases with a rise in:

Why are small drops of liquid spherical in shape?

$A$ $U$-shaped wire is dipped in a soap solution and removed. The thin soap film formed between the wire and the light slider supports a weight of $1.5 \times 10^{-2} \; N$ (which includes the small weight of the slider). The length of the slider is $30 \; cm$. What is the surface tension of the film?

What mass should be suspended from the wire $CD$ to keep it in equilibrium?