The velocity of a small ball of mass \(M\) and density \(d\), when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is \(d\over 2\) then the viscous force acting on the ball will be:

1.	\(\frac{3Mg}{2}\)	2.	\(2Mg\)
3.	\(\frac{Mg}{2}\)	4.	\(Mg\)

Equal mass of three liquids are kept in three identical cylindrical vessels \(A\), \(B\) and \(C\). The densities are \(\rho_A,~\rho_B,~\rho_C\) with \(\rho_A<\rho_B<\rho_C\) . The force on the base will be:

Water enters through end \(A\) with a speed \(v_1\) and leaves through end \(B\) with a speed \(v_2\) of a cylindrical tube AB. The tube is always completely filled with water. In case I the tube is horizontal, in case II it is vertical with the end \(A\) upward and in case III it is vertical with the end \(B\) upward. We have \(v_1=v_2\) for:
1. case I
2. case II
3. case III
4. each one

Water is flowing through a long horizontal tube. Let \(P_A\) and \(P_B\) be the pressures at two points \(A\) and \(B\) of the tube.

A liquid is contained in a vertical tube of semicircular cross-section (figure). The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio:

1. \(1:1\)
2. \(1:2\)
3. \(\pi:2\)
4. \(2: \pi\)

When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary.

Choose the correct option:

Streamline flow is more likely for liquids with

Choose the correct option:

A wooden block with a coin placed on its top, floats in water as shown in the figure.

The distances \(l\) and \(h\) are shown in the figure. After some time, the coin falls
into the water. Then,

Choose the correct alterative/s: