Mechanical Properties of Fluids Set 4

1.

Water is flowing through a horizontal pipe of non-uniform cross-section. At the extreme narrow portion of the pipe, the water will have

Maximum speed and least pressure Maximum pressure and least speed Both pressure and speed maximum Both pressure and speed least NULL NULL NULL

2.

A river of salty water if flowing with a velocity

. If the density of the water is

, then the kinetic energy of each cubic meter of water is

2.4 J 24 J 2.4 Kj 4.8 kJ NULL NULL NULL

3.

Angle of contact of a liquid with a solid depend on

solid only liquid only both on solid and liquid orientation of the solid surface in liquid NULL NULL NULL

4.

The glycerin of density

is flowing through a conical tube with end radii 0.1 m and 0.04 m respectively. The pressure difference across the ends is

. The rate of flow of glycerine through the tube is

NULL NULL NULL

5.

An adulterated sample of milk has density of

, while pure milk has a density of

. Then the volume of pure milk in a sample of 10 L of adulterated milk is

0.5 L 1.0 L 2.0 L 4.0 L NULL NULL NULL

6.

A given shaped glass tube having uniform cross section is filled with water and is mounted on a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity

then

Water levels in both sections

and

go up Water level in Section

goes up and that in

comes down Water level in Section

comes down and that in

it goes up Water levels remains same in both section NULL NULL NULL

7.

A large ship can float but a steel needle sinks because of

Viscosity Surface tension Density None of these NULL NULL NULL

8.

A film of water is found between two straight parallel wires of length 10 cm each separated by 0.2 cm. If their separation is increased by 1 mm, while still maintaining their parallelism, how much work will have to be done? (surface tension of water is

)