Two cars, passing each other at high speed, are in danger of side swiping because of

The clouds float in the atmosphere because of their low :

A boat floating in a tank is carrying some passengers. If the passengers drink water from the tank, how will it affect the water level of the tank?

A needle sinks in water whereas a ship made of iron floats on it because :

A shaving brush is dipped in water. When taken out the hairs of the brush are seen to be drawn together due to

Water rises up a capillary tube because of -