A liquid of density $750\,kgm ^{-3}$ flows smoothly through a horizontal pipe that tapers in crosssectional area from $A _{1}=1.2 \times 10^{-2}\,m ^{2}$ to $A_{2}=\frac{A_{1}}{2}$. The pressure difference between the wide and narrow sections of the pipe is $4500\,Pa$. The rate of flow of liquid is________$\times 10^{-3}\,m ^{3} s ^{-1}$
$20$
$23$
$24$
$29$
Alaminar stream is flowing vertically down from a tap of cross-section area $1$ $cm^2$. At a distance $10 $ $cm$ below the tap, the cross-section area of the stream has reduced to $1/2$ $cm^2$. The volumetric flow rate of water from the tap must be about ........ $litre/\min$
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. |
The pans of a physical balance are in equilibrium. Air is blown under the right hand pan; then the right hand pan will
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 $2.45 m/s$
Bernoulli’s principle is based on the law of conservation of