Fluids And Pres...

When a body is fully or partially immersed in a liquid, it appears to lose weight. This loss of weight is equal to the weight of

When a body is weighed in a liquid, the loss in its weight depends upon

Which of the following would a hydrogen balloon find easier to lift?

A vessel with water is placed on a weighing scale. The weighing scale reads 600 g. Now, a ball of 40 g and density 0.80 g/cc is sunk into the water with a pin as shown in the figure, keeping it sunk. The final reading of the weighing scale will be

A cork of density 250 kgm^-3 floats in a liquid with one-third of its volume below the surface of the liquid. Find the density of the liquid.

When a piece of ice melts in water, the level of water

Two solids - A and B - float in a liquid. It is observed that A floats with half its volume immersed and B floats with (2/3) of its volume immersed. Find the ratio of densities of A and B.

A man is sitting in a boat, which is floating in a pond. If the man drinks some water from the pond, the level of water in the pond will

Water flows through a frictionless duct with a cross-section varying as shown in the figure.



The pressure p at points along the axis is represented by

A large open tank has two holes in the wall. One is a square hole of side L at a depth y form the top and the other is a circular hole of radius R at a depth 4y from the top. When the tank is completely filled with water, the quantity of water flowing out per second from both holes is the same. Then R, is equal to

The principle of operation of a Brahma's press is based on

When cooking oil is heated in a frying pan, the oil moves around in the pan more easily, when it is hot. The main reason for this is that with rise in temperature, there is a decrease in

A raindrop reaching the ground with terminal velocity has momentum p. Another drop of twice the radius, also reaching the ground with terminal velocity will have the momentum

A force of 10 kg weight is applied on the head of a nail. The area of cross-section of the tip of the nail is 0.0001 cm². What is the pressure?

A massless conical flask filled with liquid is kept on a table in vacuum. The force exerted by the liquid on the base of the flask is W₁. The force exerted by the flask on the table is W₂. Which of the following relations holds true?

A liquid of density p comes out with a velocity v from a horizontal tube of area of cross–section A. The reaction force exerted by the liquid on the tube is F. Which of the following relations is incorrect?

As a bubble comes from the bottom of a lake to the top, its radius

The ratio of the diameters of an air bubble at the bottom and at the surface is 1:2.If 1 atmosphere is equal to pressure of 10 m long water column,then what is the depth of the lake?

The force of cohesion is the greatest in

Two glass plates are put together with a few drops of water between them. Then it becomes difficult to separate the two by pulling in opposite direction on account of