Question

A cubical vessel of height 1m is full of water. The work done in pumping water out of the vessel is

Solution

Correct option is

4900 J

 

Let l be the dimension of each side of the cubical vessel. The of water contained in a height x is . Therefore, the work done is 

           

                

                .

SIMILAR QUESTIONS

Q1

Two blocks A and B are made of different kinds of wood. Block A floats in water with  of its above the surface water. Block B floats in water with  of its volume below the surface of water. The ratio of the densities of A and B is     

Q2

The pressures inside two soap bubbles are 1.002 and 1.004 atmospheres. Their respective volumes are in the ratio of

Q3

If W is the amount of work done in blowing a bubble of volume, V, what will be the amount of work done to blow a bubble of volume 8 V 

Q4

Water is flowing through a tube of radius r with a speed v. If this tube is joined to another tube of radius r/2, what is the speed of water in the second tube?

Q5

Equal masses of two substances of densities  are mixed together. The density of the mixture would be

Q6

Equal volumes of two substances of densities  are mixed together. The density of the mixture would be

Q7

A small sphere of volume V falling in a viscous fluid acquires a terminal velocity vt. The terminal velocity of a sphere of volume 8 V of the same material and falling in the same fluid will be   

Q8

A capillary tube of radius is immersed in water and water rises in it to a height h. The mass of water in the capillary tube is 5 g. Another capillary tube of radius 2r is immersed in water in water. The mass of water that will rise in this tube is