Fluid Mechanics Questions

Fig. shows the load-extension curves for four wires A, B, C and D. The dimensions of all the four wires are identical but materials of wires are different. Which wire has highest value of Young′...

Which of the following works on Pascal′s law ?

An aeroplane of mass 3 × 104 kg and total wing area of 120 m2 is in a level flight at some height. The difference in pressure between the upper and lower surfaces of its wings in kilopascals is (...

A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m2. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on th...

Two non-mixing liquids of densities ρ and nρ(n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder...

A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal veloci...

A glass capillary tube is of the shape of a truncated cone with an apex angle α so that its two ends have cross sections of different radii. When dipped in water vertically, water rises in it to ...

A block of density 2000 kg/m3 and mass 10 kg is suspended by a spring stiffness 100 N/m. The other end of the spring is attached to a fixed support. The block is completely submerged in a liquid of de...

A solid sphere of radius R and density ρ is attached to one end of a mass-less spring of force constant k. The other end of the spring is connected to another solid sphere of radius R and density...

A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tude is then rotates in a horizontal plane about one of its ends with a uniform angular...

A U-tube of uniform cross-section is partially filled whith a liquid I. Another liquid II which does not mix with liquid I is pured into one side. It is found that the liquid levels of the two sides o...

A vessel contains oil (density = ) over murcury (density = 13.6 g/cm3). Ahomogeneous sphere floats with half of its volume immersed in murcury and the other half in oil. The density of the material of...

Water from a tap emerges vertically downwards with an initinal speed of 1.0 m/s. The cross section area of tap is 10-4m2. Assume that pressure is constant throughout the stream of water and that the f...

A closed compartment containing gas is is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then, the pressure in the compartment is

A large open tank has two holes in the wall. One is square hole of side L at a depth y from from the top and the other is a circular hole of radius R at a depth 4y from the top. When the tank is compl...

Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v. The retarding viscous force acting on the spherical ball is

Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v. The retarding viscous force acting on the spherical ball is

A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in ms-1) through a small hole on the side wall of the cylinder near its bottom is...

The lift of an air plane is based on

Two rods A and B made up of same metal have same length. The ratio of their resistances is 1 : 2. If these rods are immersed in water then loss in weight will be : -