
Consider a cylindrical tank of radius is filled with water. The top surface of water is at from the bottom of the cylinder. There is a hole on the wall of cylinder at a height of from the bottom. A force of is applied an the top surface of water using a piston. The speed of efflux from the hole will be :
(given atmospheric pressure , density of water and gravitational acceleration )

(given atmospheric pressure , density of water and gravitational acceleration )



Important Questions on Properties of Solid and Liquid

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Clothes containing oil or grease stains cannot be cleaned by water wash.
Reason (R): Because the angle of contact between the oil/grease and water is obtuse. In light of the above statements, choose the correct answer from the option given below.


The velocity of a small ball of mass and density when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is , then the value of viscous force acting on the ball will be , the value of is _____ .
[use ]



Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : Steel is used in the construction of buildings and bridges.
Reason (R) : Steel is more elastic and its elastic limit is high.
In the light of above statements, choose the most appropriate answer from the options given below

A spherical ball of radius and density is dropped in glycerine of coefficient of viscosity poise and density . Viscous force on the ball when it attains constant velocity is . The value of is
(Given, )
