Explain the meaning of the statement 'Relative density of aluminium is 2.7'.
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Relative density of aluminium is 2.7 means a piece of aluminium of any volume has mass 2.7 times that of an equal volume of water.
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A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.
Distinguish between density and relative density.
What is the unit of relative density?
How does the density of a body and that of a liquid determine whether the body will float or sink into that liquid?