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Question
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
Solution
Density of water 1.0 g Cm-3
Density of piece of iron = 7.8 × 10-3 g Cm-3
7.8 × `10^-3` = `7.8/1000`=0.0078 g `cm^3` < 1.0 g `cm^3`
∴ Density of piece of iron is LESS than density of water.
Hence, a piece of iron will FLOAT in water.
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