Density=170 kg/m³
170 Kg/m³=(170 Kg/m³)(1000 g/1 kg)(1000000 cm³ /1 m³)=0.17 g/cm³
answer: the density of balsa wood would be 0.17 g/cm³
I think balsa wood, rather than oak or ash, is commonly used for building models because the density of balsa wood is lower than oak or ash, therefore balsa wood is light and easily shaped and cut with hands tools.
Density of oak= 0.76 g/cm³
Density of ash= 0.6 g/cm³