Mention some examples to show that the surface of a liquid behaves as a stretched elastic membrane.

Why the surface of a liquid act like a stretched membrane?

Fill in the blank spaces by choosing the correct words from the list given below: spaces, concave, adhesion, increases, surface tension The phenomenon due to which the exposed surface of a liquid behaves like a stretched membrane is called_________.

A rectangular tank filled with some liquid is accelerated along a horizontal surface at (40)/(3)ms^(-2) . Inside the liquid, a laser pointer is fixed a the centre of the tank which shoots a thin laser beam in the vertically upward direction. If after refraction from the liquid surface, the laser beam moves along the surface of the liquid, then what is the refrctive index of the liquid ?

The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius circle of the circle formed by elastic thread will

A square wire frame of size L is dipped in a liquid . On taking out , a membrane is formed . If the surface tension of liquid is T, then force acting per unit length of the frame is

Assertion Young's modulus of elasticity is not defined for liquids. Reason Liquids cannot be stretched as wires.

A square wire fram of size L is dipped in a liquid. On taking out a membrane is formed. Ifthe surface tension of the liquid is T, the force acting on the frame will be

Assertion: The first step of gas exchange occurs through body surface in some animals. Reason: Body surface or membrane of amphibia is thick in nature.

Give any two examples of each type of liquid solutions showing positive and negative deviations.

A ball of density d is dropped on to a horizontal solid surface. It bounces elastically from the surface and returns to its original position in a time t_1 . Next, the ball is released and it falls through the same height before striking the surface of a liquid of density of d_L (a) If dltd_L , obtain an expression (in terms of d, t_1 and d_L ) for the time t_2 the ball takes to come back to the position from which it was released. (b) Is the motion of the ball simple harmonic? (c) If d=d_L , how does the speed of the ball depend on its depth inside the liquid? Neglect all frictional and other dissipative forces. Assume the depth of the liquid to be large.