The pressure within a bubble is higher than that outside by an amount proportional

The pressure difference across the surface of a spherical water drop of radius 1 mm and surface tension 0.07 N/m is

An air bubble just inside a soap solution and a soap bubble blown using the same solution have their radii in the ratio 3 : 2. The ratio of the excess pressure inside them is

A liquid rises to a height of 5 cm in a glass capillary tube of radius 0.02 cm. The height to which the liquid would rise in a glass capillary tube of radius 0.04 cm is

In a gravity free space, the liquid in a capillary tube will rise to

In which of the following substances, does the surface tension increase with an increase in temperature?

A fluid flows in steady flow through a pipe. The pipe has a circular cross section, but its radius varies along its length. The mass of the fluid passing per second at the entrance point (radius R) of the pipe is $Q_{1}Q\_1$ while that at the exit point (radius R/2) is $Q_{2}Q\_2$ . Then, $Q_{2}Q\_2$ is equal to

The dimensions of coefficient of viscosity are

The unit of coefficient of viscosity is

A fluid flows past a sphere in streamline flow. The viscous force on the sphere is directly proportional to