If a capillary tube is partially dipped vertically into liquid and the levels of the liquid inside and outside are same, then the angle of contact is:

1.	90°	2.	30°
3.	45°	4.	0°

From the given diagram, the velocity \(v_3\) is:
               
 

From the given diagram, the speed with which water leaves the tube B of small diameter is-

An iron sphere is dropped into a viscous liquid. Which of the following represents its acceleration (a) versus time (t) graph?

1.		2.
3.		4.

The diameter of a syringe is 4 mm and the diameter of its nozzle (opening) is 1 mm. The syringe is placed on the table horizontally at a height of 1.25 m. If the piston is moved at a speed of 0.5 m/s, then considering the liquid in the syringe to be ideal, the horizontal range of liquid is: (g = 10 m/${\mathrm{s}}^2$)
1. 4 m
2. 8 m
3. 0.4 m
4. 0.2 m

A water tank is kept at a height H above the ground and the tank contains depth H of water as shown. Find the maximum possible range of water current, if there exists a small hole on the sidewall of the tank.
          

Water flows through a frictionless tube with a varying cross-section as shown in the figure. Variation of pressure P at point x along the axis is roughly given by:

1.		2.
3.		4.

Two soap bubbles are connected by a tube as shown in the figure. Which of the following statement is true?
                                  

Water flows through a horizontal tube as shown in figure. If the difference in heights of water column in vertical tubes is 80 cm and the area of cross-section at A and B are 5 cm² and 3 cm² respectively, then the rate of flow of water at A( in cc/sec) is:-

[$Take$ $g$ $=10$ $m/s^2$]

1. $15\times {10}^2$

2. $15\times {10}^3$

3. 150

4. None of these

The velocity of a small ball of mass m and density $\mathrm{\rho }$ when dropped in a container filled with glycerin of density $\sigma$ becomes constant after sometime. The viscous force acting on the ball in the final stage is:-

1. $\mathrm{mg}\left(\frac{\mathrm{\sigma }}{\mathrm{\rho }}\right)$

2. $\mathrm{mg}\left(1+\frac{\mathrm{\sigma }}{\mathrm{\rho }}\right)$

3. $\mathrm{mg}\left(1-\frac{\mathrm{\sigma }}{\mathrm{\rho }}\right)$

4. mg