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NEET 2026 · Significant Figures & Order of Magnitude

Significant Figures & Order of Magnitude question from NEET 2026

Q2NEET 2026Medium

Significant Figures & Order of Magnitude

Each side of a metallic cube of mass 5.580 kg is measured to the 9.0 cm. Keeping the significant figures in view, the density of the material of the cube can be best expressed as X×103 kg m−3X \times 10^{3}\text{ kg m}^{-3} where the value of XX is:

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Answer: (d)

  1. V=(9.0 cm)3=729 cm3=7.29×10−4 m3V = (9.0\ \text{cm})^{3} = 729\ \text{cm}^3 = 7.29 \times 10^{-4}\ \text{m}^3
  2. ρ=5.5807.29×10−4=7654 kg m−3\rho = \frac{5.580}{7.29 \times 10^{-4}} = 7654\ \text{kg m}^{-3}
  3. 9.0 has 2 significant figures, so ρ=7.7×103 kg m−3\rho = 7.7 \times 10^{3}\ \text{kg m}^{-3}
  4. So the answer is (d) 7.7.
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