Question

The relative density of mercury is 13.6. State its density in
(i) C.G.S. unit and
(ii) S.I. unit. 

Answer 1

R.D. of mercury = 13.6

(i) Density in C.G.S. = 13.6 gcm^-3

(ii) Density in S.I. = 13.6 × 10³ kgm^-3

Answer 2

Relative density = density of mercury /density of water.
The density of mercury = relative density X density of water.
Relative density = 13.6.
Density of water in C.G.S system = 1g cm^-3.
So, density of mercury in C.G.S system = 13.6 X1 = 13.6 gcm^-3.
The density of water in the SI system = 1000 Kg m^-3.
So, density of mercury in SI system = 13.6 X1000 = 13.6 X10³ Kgcm^-3.