Question

An iron nail sinks in the water while an iron ship floats on water. Explain the reason.
What can you say about the average density of a ship floating on water?

Answer 1

The density of iron is more than the density of water so it sinks down in the water but in case of a ship, it is designed in such a manner that it encloses large quantity of air in airtight bags and in rooms and corridors which makes the average density of ship less than that of water and ship floats on the surface of the water.