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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.
Answer the following:
Will a piece of iron float or sink in mercury?
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Solution
Density of water 1.0 g Cm-3
Density of piece of iron = 7.8 × 10-3
Density of mercury is 13.6 × 10-3 g Cm-3
Since 7.8 × 10-3 < 13.6 × 10-3
∴ Density of piece of iron is LESS than density of mercury
∴ Piece of iron will FLOAT in mercury
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