Force in Column - $\mathrm{I}$ and its use is in Column - $\mathrm{II}$ are given. Match them appropriately.

Column - $\mathrm{I}$	Column - $\mathrm{II}$
$(a)$ Cohesive force	$(i)$ Useful for writing by chalk on blackboard.
$(b)$ Adhesive force	$(ii)$ Useful in soldering.
	$(iii)$Useful for formation of spherical drops of liquid.

An $ L-$ shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is $ 10.6 cm$  above the surface of water. ....... $cm$ will be the height of the jet of water coming from the orifice ? Velocity of water stream is $2.45 m/s$ 

According to Bernoulli's equation $\frac{P}{{\rho g}} + h + \frac{1}{2}\,\frac{{{v^2}}}{g} = {\rm{constant}}$     The terms $A, B$  and $ C$  are generally called respectively:

A plane is in level flight at constant speed and each of its two wings has an area of $25 \;m ^{2}$ If the speed of the air is $180 \;km / h$ over the lower wing and $234\; km / h$ over the upper wing surface, determine the plane's mass in $kg$. (Take air density to be $1\; kg m ^{-3}$ ).

In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes $A, B$  and $ C$  are connected to the pipe. The radii of the tubes $A, B $ and $C$  at the junction are respectively $ 2 cm, 1 cm$   and $2 cm.$  It can be said that the

The reading of pressure metre attached with a closed pipe is $4.5 \times 10^4 \mathrm{~N} / \mathrm{m}^2$. On opening the valve, water starts flowing and the reading of pressure metre falls to $2.0 \times 10^4 \mathrm{~N} / \mathrm{m}^2$. The velocity of water is found to be $\sqrt{\mathrm{V}} \mathrm{m} / \mathrm{s}$. The value of $\mathrm{V}$ is__________