The density of wood is 0.65 $gc{m}^3$ in CGS system. Its density in SI system is

Q. If the mercury in the barometer is replaced by water, What will be the resulting height of the water column?
Given: Density of water = $1000kg{m}^3$, Density of mercury = $13600kg{m}^3$

Q. A cube of wood supporting $200g$ mass just floats in water. When mass is removed cube rises by $2cm$. What is side of cube in $cm$? (Density of water = 1000 $\frac{kg}{m^3}$)

Q.

Calculate the pressure at a depth of 50 $m$ below the surface of the sea. The density of sea water is 1024 $\frac{kg}{m^3}$.

Q. The density of brass on CGS system is 8.4 $g/c{m}^3$. Its density in SI system is:

Q. Estimate the average mass density of a sodium atom assuming its size to be about $2.5$. (Use the known values of Avogadro's number and the atomic mass of sodium). Compare it with the density of sodium in its crystalline phase : $970$ $kg{m}^3$. Are the two densities of the same order of magnitude? If so, why?