Question

. If the density of kerosene is 810 Kg\m3 and density of water is 1000 kg\m3 the relative density of kerosene is

810
0.81
8.1
.081​

Answer 1

Answer:

0.81

Explanation:

relative density =density of object /density of water

= 810/1000

= 0.810

Answer 2

Given,

Density of kerosene = 810 kg/m³,

Density of water = 1000 kg/m³.

To find,

Relative density of kerosene.

Solution,

The relative density of a substance is defined as the ratio of the density of that particular substance to the density of the reference substance.

The reference is taken as water for liquids. While for gaseous substances it is air.

Mathematically,

$Relative \hspace{3} density=\frac{\rho_{substance}}{\rho_{reference}}$

Where ρ is the density.

So, using the above relation, for kerosene,

$Relative \hspace{3} density=\frac{\rho_{kerosene}}{\rho_{water}}=\frac{810}{1000}$

⇒ $Relative \hspace{3} density=0.810=0.81$

⇒ Relative density of kerosene = 0.81.

Therefore, the relative density of kerosene is 0.81.