Embibe Experts Solutions for Chapter: Viscosity and Surface Tension, Exercise 1: Exercise 1

Eight raindrops each of radius $R$ fall through air with terminal velocity $6 \mathrm{cm}{ \mathrm{s}}^{-1}.$ What is the terminal velocity of the bigger drop formed by coalescing these drops together?

A ball is thrown downward with some velocity, greater than terminal speed into a viscous liquid. Which of the following curves represents correct variation for velocity versus time?

A ball of density $\sigma$ and radius $r$ is dropped on the surface of a liquid of density $\rho$ from certain height. If speed of ball does not change even on entering in liquid and viscosity of liquid is $\eta ,$ then the height from which ball dropped is

A spherical ball is dropped in a long column of viscous liquid. The speed $v$ of the ball varies as function of time as

The work done in blowing a soap bubble of $10 \mathrm{cm}$ radius is $($surface tension of the soap solution is $\frac{3}{\mathrm{100}} \mathrm{N} {\mathrm{m}}^{-1}$​$)$

The radii of two soap bubbles are $r_1$ and $r_2$. In isothermal conditions, two meet together in a vacuum. Then the radius of the resultant bubble is given by:

The excess pressure inside an air bubble of radius $r$ just below (inside) the surface of the water is ​$P_1$. The pressure inside a drop of the same size (radius) which is just outside the water surface is $P_2$. If $T$ is the surface tension then

A capillary tube of the radius, $R$ is immersed in water, and water rises in it to a height, $H$. Mass of water in the capillary tube is $M$. If the radius of the tube is doubled, the mass of water that will rise in the capillary tube will now be