1.

The mass of a block made of certain material is `13.5 kg` and its volume is `15 xx 10^-3 m^3`. Will the block sink or float in water ? Give a reason for your answer.

Answer» `M=13.5kg`,`V=15xx10^-3m^3`. Density of the block,
`d=(M)/(V)=(13.5kg)/(15xx10^-3m^3)=0.9xx10^3(kg)/(m^3)=900(kg)/(m^3)`
The block floats since its density isless than that of water, i.e., `1000(kg)/(m^3)`.


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