Q7 of 44 Page 335

A wooden cube of side 10 cm has a mass of 700 g. It floats in water with :


The cube displaces water equal to its weight. When it immerses 7 cm, the volume of water displaced is 10x10x7 cm3 which is 700 cm3. The weight of displaced is 700 g. Thus, the cube starts floating.

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5

The unit of relative density is :

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Two balls, one of iron and other of aluminium experience same upthrust when dipped in water.

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Archimedes’ principle states that when a body is totally or partially immersed in a fluid, the upthrust is equal to :

 1

Write true or false for the following statements :

Relative density has no unit.