An iron needle floats on the surface of water due to –

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

Why does an iron nail float on mercury while it sinks in water?

An ice cube is floating in a glass of water. What happens to the water level when the ice melts? It –

Oil spreads on water surface because –

A piece of ice is floating in a beaker containing water up to its brim. When whole of the ice melts