Question

why does an iron nail sinks whereas a ship made of iron floats

Answer 1

It is defined by the weight of displaced water. If a nail is dipped, the volume of water it displaces weighs less than that of steel due to lower density thus the nail sinks.However ship works differently. ... So the amount of water it displaces, weighs more than that of hull, which makes it float.

Answer 2

The density of iron is more than that of water,this makes the iron nail sink

But when we talk about an iron ship it contains large air spaces of air which helps it to float on water and prevents sinking of the ship......
Since iron nail does not have any air cavities it sinks in the water

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