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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What is the unit of relative density?
Distinguish between density and 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?
A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.