Force and Press...

The density of air is 1.3 kg/m³. What mass of air is contained in a room measuring 2.5 m x 4 m x 10 m?

Equal masses of two liquids having densities D and 2D are mixed, then the density of the resulting mixture is

The densities of three liquids are D, 2D and 3D. What will be the density of the resulting mixture if equal volume of the three liquids are mixed?

Two vessels A and B have the same base area and contain water up to the same height, but the mass of water in vessel A is four times that of water in vessel B. The ratio of pressure on the base of vessel A to that on the base of vessel B is

Read the following statements and choose the correct option.

Statement A: At the bottom of three vessels having different shapes, if the water is filled up to the same height, the pressure is the same.

Statement B: Pressure is independent of the base area and depends on the height of the liquid filled.

In which of the following cases will the increase in pressure be the greatest?

Read the following statements and choose the correct option.

Statement A: At the mountains, the water boils at a temperature less than 100°C.
Statement B: At the top of mountains, the atmospheric pressure is less than pressure at sea-level.

Choose the correct statements from the following.

(A) Blood pressure is minimum at our feet and maximum at our head.
(B) It is easier for a camel to move on the sand because its feet have a large area.
(C) The pressure along a horizontal line in a vessel filled with water is the same.

Choose the correct relationship between pressures exerted at points A, B and C in the liquid.

The given blocks A, B and C, all having the same density are immersed in a fluid. For which of these blocks is the buoyant force the greatest?

Which of the following options is/are TRUE?

Read the following statements and choose the correct option.

Statement A: Buoyant force on a fully immersed sphere will be more than that on a cube which is made of the same material and has the same mass as the sphere.
Statement B: Sphere will displace less volume as compared to the cube.

A solid piece of iron sinks in water but floats in mercury. This is because the

A sphere made of iron is immersed in water. Another sphere of same dimensions but made of aluminium is immersed in alcohol. Choose the correct statement from the following.

A force of 10 kg wt is applied on the head of a nail of area of cross-section (of the tip) 0.0001 cm². What is the pressure exerted?

When you press a rubber sucker against a surface, most of the air between its cup and the surface escapes out. To pull the rubber sucker off the surface, the applied force should be

What happens when a stream of air is blown through a tube under one of the pans of a physical balance in equilibrium?

A deep sea diver may hurt his eardrum during diving because of

Water is flowing through a pipe under constant pressure. At some place, the pipe becomes narrow. The pressure of water at this place

A raft is 2.35 m wide, 1.25 m long, and 0.365 m deep. What is the buoyant force on the raft, if only 0.125 m of the raft remains above water? (Take g = 10 m/s²)