Question

छठी कक्षा में असफल होने पर सांत्वना देते हुए अपने छोटे भाई को पत्र लिखिए।
What is relative density?
What is the SI unit of density?​

Answer 1

Answer:

Explanation:

the ratio of the density of a substance to the density of a standard, usually water for a liquid or solid, and air for a gas...

Answer 2

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Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.

Formula :

$\large\sf \pmb{RD=\frac{\rho_{\text{substance}}}{\rho_{\text{reference}}}}$

$\sf \pmb{RD}$ = relative density

$\sf \pmb{\rho_{\text{substance}}}$= density of the substance being measured

$\sf \pmb{\rho_{\text{ reference}} }$= Density of the reference