Question

A ship made of iron floats in water but ab iron needle sinks. why ?? give reasons.

Answer 1

A needle made of iron has density same as iron. The buoyant force due to displaced water is much less than it's weight as the displaced water is very less in volume(same as that of needle). So the needle sinks. A ship is made of iron has lot of free space filled with air.

Answer 2

Answer:

The iron ship is constructed in such a way that it is mostly hollow from within Hence the average density of the ship is less than that of water (i.e. less than 1 g/cm3 ) wheres iron needle being compact and its density is 7.6g/cm3 which is more than 1 g/cm3 (density of water) Hence the needle sinks in water.

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