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For the figures given below, the correct observation is:
              

Which of the following diagrams does not represent a streamline flow?

1.		2.
3.		4.

A spherical drop of water has a radius of 1 mm. If the surface tension of water is $70\times {10}^{-3}$ N/m, the difference in pressures inside and outside the spherical drop is:

An iceberg of density \(900 ~\text{kg/m}^ 3\)${\mathrm{}}^{}$ is floating in the water of density \(1000 ~\text{kg/m}^ 3.\) The percentage of the volume of ice cube outside the water is: 
1. \(20\%      \)                                 
2. \(35\%      \)
3. \(10\%      \)                                    
4. \(25\%      \)

If an incompressible liquid is flowing through a horizontal pipe having branches of area \({A},\) \(0.4{A},\) and \(0.5{A}\) as shown in the figure, then the value of \({v}\) is:
                               
1. \(3.2~\text{m/s}\)
2. \(6.4~\text{m/s}\)
3. \(1.6~\text{m/s}\)
4. \(0.8~\text{m/s}\)

The pressure of water in a water pipe when tap is opened and closed are respectively \(3\times10^5\) Nm^–2 and \(3.5\times10^5\) Nm^–2. With open tap, the velocity of water flowing is:
              
1. \(10\) ms^–1                           
2. \(5\) ms^–1
3. \(20\) ms^–1       
4. \(15\) ms^–1

The relative velocity of two adjacent layers of a liquid is \(6~\text{cm/s}\) and the perpendicular distance between layers is \(0.1~\text{mm}.\) The velocity gradient for liquid (in per second) is:
1. \(6\)
2. \(0.6\)
3. \(0.06\)
4. \(600\)

A spherical ball of radius \(r\) is falling in a viscous fluid of viscosity \(\eta\) with a velocity \(v.\) The retarding viscous force acting on the spherical ball is:

The property of surface tension of the liquid is due to:

Which of the following graphs best represents the variation of capillary rise of a liquid with the radius of the capillary tube?

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