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Physics · UNITS AND MEASUREMENT
हिन्दीA student measures the mass of a metal block as \( 12.42\text{ g} \) and its volume as \( 2.5\text{ cm}^3 \). The density of the metal block, reported to the correct number of significant figures, should be:
Correct answer · Option 3
\( 5.0\text{ g cm}^{-3} \)
Explanation
In division, the result must be reported with as many significant figures as the input quantity with the least significant figures (volume has 2 sig figs). Density \( = \frac{12.42}{2.5} = 4.968 \approx 5.0\text{ g cm}^{-3} \).
