If a mosquito dipped into water and relesed it is not able to fly till it is dry again. Explain.

How birds are able to fly and walk ? Explain.

A poled egg when dipped in water swells while is saturated brine solution it shrinks. Explain

A peeled egg when dipped in water swells, while in saturated salt solution it shrinks. Explain.

Suppose a ball of mass m is thrown vertically upward with an initial speed v , its speed decreases continuously till it becomes zero. Thereafter, the ball beigns to fall downward and attains the speed v again before striking the ground. It implies that the magnitude of initial and final momentums of the ball are same. Yet, it is not an example of conservation of momentum. Explain why?

Suppose a ball of mass m is thrown vertically upward with an initial speed v , its speed decreases continuously till it becomes zero. Thereafter, the ball beigns to fall downward and attains the speed v again before striking the ground. It implies that the magnitude of initial and final momentums of the ball are same. Yet, it is not an example of conservation of momentum. Explain why?

A glass capillary tube of radius r is placed vertically touching the surface of water. The water rises to height h in capillary tube. If now the tube is dipped into water till only h/2 length of it is outside the water surface the , radius of curvature of the meniscus of water in capillary tube will be,

A glass capillary tube of radius r is placed vertically touching the surface of water. The water rises to height h in capillary tube. If now the tube is dipped into water till only h/2 length of it is outside the water surface the , radius of curvature of the meniscus of water in capillary tube will be,