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Gravitation — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceGravitation4 Marks
Question
Define relative density of a solid. State its unit. How is it related to its density? Write mathematical expression for relative density. What conclusion do you draw if relative density of a substance is (a) greater than 1, (b) less than 1 and (c) equal to 1?
✓

Answer

Relative density refers to the ratio of the density of a substance to the density of water.
$\text{Relative Density}=\frac{\text{Density of a substance}}{\text{Density of water}}$
  1. Greater than 1: If the relative density is greater than 1, that means that the density of a substance is greater than the density of water.
  2. Less than 1: If the relative density is less than 1, that means that the density of a substance is less than the density of water.
  3. Equal to 1: If the relative density is equal to 1, that means that the density of a substance is equal to the density of water.

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