why the needle of iron swims on water surface when it is kept gently
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No it is not right..... the needle of iron sinks because it has more density as compared to a cork or a substance which has less density. The iron needle when put on water gently, it just swims for 3 to 4 seconds not more then that...
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It is not true it could not swim on the surface of water becoz it is unable to displace water
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