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9. GRAVITATION
medium
The volume of $50\, g$ of a substance is $20\, cm^3$. If the density of water is $1\, g$ $cm^{-3}$, will the substance float or sink?
Option A
Option B
Option C
Option D
Solution
If the density of an object is more than the density of a liquid, then it sinks in the liquid. On the other hand, if the density of an object is less than the density of a liquid, then it floats on the surface of the liquid.
Here, density of the substance $=\frac{\text {Mass of the substance}}{\text {Volume of the substance}}=\frac{50}{20}=2.5 \,g / cm ^{3}$
The density of the substance is more than the density of water $(1 \,g \,cm^{-3})$. Hence, the substance will sink in water.
Standard 9
Science
