Meenu threw a stone and a small piece of cotton wool into a bucket of water. Which one of it will
sink float. Why?
Answers
Explanation:
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Answer:
Why is it that stones sink in water?
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Why is it that stones sink in water?
On the surface (pun intended), it seems that most stones sink in water because each one is more dense than the water. However, I think that there's a little more to it. Ships are made out of material that is denser than water, yet do not (usually) sink.
If I have it correct: If the shape of an object causes it to displace liquid that weights as much as the object, the object will not sink (buoyancy).
Of course, one could argue that the air trapped by the shape of the object is part of the object and thus the overall density of the object is less than that of the water.
In theory then, a really weird shaped stone that is denser than water, might actually float if it were set just right so that it would displace enough water.