Mechanical Properties Of Fluids CBSE Questions & Answers

A capillary tube remains dipped in a water container, so that loss in weight of the capillary tube is

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

The unit of surface tension in M.K.S units is given by

What will be the height of a liquid column in a capillary tube on the surface of the moon?

Two match sticks are laid side by side on the surface of water. When a drop of light oil on the end of a third match stick is touched to the surface film between the two floating sticks, the two match sticks

Soldering of two metals possible because of the property of

When the adhesive force in the case of liquid and glass is greater than the cohesive forces between the liquid molecules, the shape of the meniscus of liquid in a capillary tube is

If the work done in blowing a bubble of volume V is W, then the work done in blowing a soap bubble of volume 2V will be

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

A raft of wood of density 600kg/ \({{\rm{m}}^{\rm{3}}}\) and mass 120 kg floats in water. How much weight can be put on the raft to make it just sink?

If a block of iron (density 5gm/ \({\rm{c}}{{\rm{m}}^{\rm{3}}}\)) of size 5 cm \( \times \) 5 cm \( \times \) 5 cm was weighed whilst completely submerged in water, what would have been its apparent weight? (density of water = 1 gm/ \({\rm{c}}{{\rm{m}}^{\rm{3}}}\))

A boy is carrying a bucket of water in one hand with a 0.05 kg cork piece in it. After sometime he takes out the cork piece and holds it in the other hand. The boy will carry

A beaker is partly filled with water, the beaker and the contents have a mass of 50 gm. A piece of wood having a volume of 5 cc. is floated in the beaker. The density of wood is 0.8 g/cc. the mass of the beaker and its contents is

A bird, resting on the floor of an airtight box, which is being carried by a boy, starts flying. The boy will feel that the box

A cube of size 10 cm is floating in equilibrium in a tank of water. When a mass of 10 gm is placed on the cube, the depth of the cube inside the water increases by (g = 10 {/tex}{\rm{m}}{{\rm{s}}^{ - {\rm{2}}}}{/tex}density of water = \({\rm{1}}{0^{\rm{3}}}\) kg \({{\rm{m}}^{ - {\rm{3}}}}\))