Why an iron needle sinks in water, but an iron ship floats in water?

An iron nail sinks in water while an iron ship floats on water.Explain the reason.

A piece of iron sinks in water, but a slip made of iron floats in water. Why?

A nail sinks in water whereas it floats on mercury.

Explain the following: An egg sinks in fresh water, but floats in a strong salt solution.

Explain why an iron nail floats on mercury, but it sinks in water.

An iron needle sinks in water as its density is ………….. than 1gmc^(-3)

When a greased iron needle is placed gently on the surface of water at rest, it floats on the surface of water. Why?

When you put a steel pin in water it sinks, but a ship made of steel floats. WHY ?

Under what conditions iron reacts with water.

Give reasons : Ice floats on water.