A liquid is poured into three vessels of the same base area and equal heights as shown in the figure, then:
                                  

1.	Maximum force on the base will be for vessel C
2.	Maximum force on the base will be for vessel B
3.	Maximum force on the base will be for vessel A
4.	Force on the base will be equal for all the vessels

A liquid is filled in a container as shown in the figure. The force exerted by the liquid on the base of the container must be:
                                 

The surface tension of a liquid is \(5\) N m^-1. If a film is held on a ring of area \(0.02\) ${\mathrm{m}}^2$, then its total surface energy is:
1. \(3\times\) ${10}^{-2}$ J
2. \(2\times\) ${10}^{-1}$ J
3. \(3\times\) ${10}^{-3}$J
4. ${10}^{-1}$ J

A liquid filled in a container has plane meniscus. If $\mathrm{\theta }$ is the angle of contact, then:
1. $\mathrm{\theta }$ = \(0^\circ\)
2. $\mathrm{\theta }$ = \(90^\circ\)
3. $\mathrm{\theta }$ < \(90^\circ\)
4. $\mathrm{\theta }$ = \(180^\circ\)

The relative velocity of two adjacent layers of a liquid is 6 cm/s and the perpendicular distance between layers is 0.1 mm. The velocity gradient for liquid (in per second) is:

A large open tank with a square hole of side \(0.1\) cm in the wall at a depth of \(0.2\) m from the top is completely filled with a liquid. The rate of flow of liquid (in ${\mathrm{cm}}^3$/s) through the hole will be: 

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

When a man sits on a boat of length 2 m and breadth 1 m floating on a lake, the boat sinks by 2 cm. The mass of the man is:

1. 25 kg

2. 40 kg

3. 60 kg

4. 80 kg

If two iron balls when fully immersed in water experience thrust force in the ratio of 1:2, then the ratio of the masses of the balls will be:
1. 1: 1
2. 1: 2
3. 2: 1
4. 1: 4

There are four cylindrical vessels identical in dimensions. If these are filled with equal masses of four different liquids P, Q, R, and S such that their densities are ${\mathrm{\rho }}_{\mathrm{p}}$ $>$ ${\mathrm{\rho }}_{\mathrm{Q}}$ $>$ ${\mathrm{\rho }}_{\mathrm{R}}$ $>$ ${\mathrm{\rho }}_{\mathrm{S}}$, then pressure at the base of vessel will be: