Question

define relative density. relative density of mercury is 13.6 the density of water is 10 -3 kg/m3 . what is the density of mercury in SI unit?

Answer 1

Relative density of a material is defined as the ratio of density of the material to that of density of water.

$density\ of\ water,\ \rho_w=10^3\ kg/m^3\\ density\ of\ mercury= \rho_m\\ \\ RD_{mercury}=13.6\\ \\ \Rightarrow \frac{\rho_m}{\rho_w}=13.6 \\ \\ \Rightarrow \rho_m=13.6 \times \rho_w\\ \\ \Rightarrow \rho_m=\boxed{13.6 \times 10^3\ kg/m^3}$

Answer 2

RD is the ratio between the density of an object and the density of water.
It is found by a formula w1 /(w2-w1)
where w1=weight of an object
           w2=weight of water
13.6=d1/1g/m³
d1=13.6x1g/m³
d1=13.6g/m³
in si unit,the density of mercury is 13.6g/m³