NEET Physics Significant Figures MCQ Question
A student measures the mass of a substance as 5.74 g (four significant figures) and its volume as 1.2 cm³ (two significant figures). What is the density of the substance, expressed with the correct number of significant figures?
4.78 g/cm³
4.783 g/cm³
4.8 g/cm³
4.7833 g/cm³
Correct Answer
Detailed Explanation
The number of significant figures in the result is determined by the measurement with the least number of significant figures, which is the volume (1.2 cm³, two significant figures). Thus, the density should be expressed with two significant figures: 5.74 g / 1.2 cm³ = 4.8 g/cm³.
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