Mechanical Properties of Fluid Mock Test (Physics) MHT CET 2021

Water rises up to a height h₁ in a capillary tube of radius r. the mass of the water lifted in the capillary tube is M. if the radius of the capillary tube is doubled, the mass of water that will rise in the capillary tube will be

A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop

The angle of contact between a glass capillary tube of length 10 cm and a liquid is 90°. If the capillary tube is dipped vertically in the liquid, then the liquid

Choose the wrong statement from the following.

If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of container is

The excess pressure in a soap bubble of radius r is proportional to

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by a force of 75 x 10^-4 N due to the weight of liquid. If the surface tension of water is 6 x 10^-2 N/m then the inner circumference of capillary must be

Coefficient of viscosity does not depends on

Viscous Force on a small sphere of radius r moving in a fluid varies directly with

Two small spheres of radii r and 2r fall through a viscous liquid with same constant speed. The viscous forces experienced by them are in ratio

In streamline flow velocity of liquid at the bottom layer is______

The surface tension of soap is T. The work done in blowing a soap bubble of radius 3R to that of radius 5R is

Two soap bubbles have radii in the ratio of 4:3. What is the ratio of work done to blow this bubbles ?

A soap bubble in vacuum has a radius of 3cm and another soap bubble in vacuum has a radius of 4cm. If the two bubbles coalesce under  isothermal condition, then the radius of new bubble is

8000 identical water drops are combined to form a big drop . Then the ratio of final surface energy to initial surface energy of all drops together is

Two tubes of same material but of different radii are dipped in a liquid. The height to a which liquid rises in one tube is 2.2cm and in other tube is 6.6cm . The ratio of their radii is

The U-tube with limbs of diameters 6mm and 3mm contain water of surface tension 7×10-² N/m . The angle of contact is zero and density 10³ kg /m³. If g is 10 m/s² . then the difference in levels in two limbs is

Molecules on the surface of liquid have

A rectangular film of liquid is extended from (4cm  x 2cm ) to (5cm x 4cm ). If the work done is 3 x 10^-4J.The value of surface tension of liquid is

Water from pipe is coming at the rate of 100liters per minute. If the radius of pipe is 5cm , the Reynolds number for the flow is of the order of :(density of water : 1000 kg/m³ , coefficient of viscosity of water = 1mPa s)

The work done in blowing a soap bubble of radius R is W₁ and that to a radius 3R is W₂. the ratio of work done is

Rain drops are spherical in shape because of

The height of water in a capillary tube of radius 2 cm is 4 cm. what should be the radius of capillary, if the water rises to 8 cm in tube?

The surface tension for pure water in a capillary tube experiment is

A.

B.

C.

D.

One thousand small water droplets of equal size combine to form a big drop. The ratio of the final surface energy to the initial surface energy is

(Surface tension of water = 70 dyne/cm)

Water can rise up to a height of 12 cm in a capillary tube. If the tube is lowered to keep only 9 cm above the water level then the water at the upper end of the capillary will

A square frame of length L is immersed in soap solution and taken out. The force experienced by the square plate is

A drop of liquid of diameter 2.8 mm beaks up into 125 identical drops. The change in energy is nearly

(S.T. of liquid = 75 × 10^–3 N/m)

5 g of water rises in the bore of capillary tube when it is dipped in water. If the radius of bore capillary tube is doubled, the mass of water that rises in the capillary tube above the outside water level is

The dimension of surface tension are