Embibe Experts Solutions for Chapter: Surface Tension, Exercise 1: MHT-CET 2017

Two small drops of mercury each of radius $R$ coalesce to form a large single drop. The ratio of the total surface energies before and after the change is

Water flows through a horizontal pipe at a speed $V$. Internal diameter of the pipe is $d$. If the water is emerging at a speed $V_1$ the diameter of the nozzle is

A wire of length $10 \mathrm{cm}$ is gently placed horizontally on the surface of water having a surface tension of $75\times {10}^{-3} \mathrm{N} {\mathrm{m}}^{-1}$. What force is required to just pull up the wire from the water surface?

Which one of the following statement is correct?

A thin metal wire of density $\rho$ floats on water surface horizontally. If it is NOT to sink in water then maximum radius of wire is proportional to ( $T=$ surface tension of water, $g=$ gravitational acceleration)

Water rises upto a height $h$ in a capillary tube on the surface of the earth. The value of $h$ increases, if the capillary tube apparatus is kept

Water rises to a height of $15 \mathrm{mm}$ in a capillary tube having cross-sectional area $A$. If cross-sectional area of the tube is made $\frac{A}{3}$ then the water will rise to a height of

In a capillary tube having area of cross-section $A$, the water rises to a height $h$. If the cross-sectional area is reduced to $\frac{A}{9}$, the rise of water in the capillary tube is