Dencity? Is the log oak or pine?

Question

It displaces 2.7 gallons of water and weighs 19.8lb. (Density of oak=0.9g/cm^3; density of pine =0.4g/cm^3.

Answer 1

density=mass(g)/volume(cm³)

 

mass = 19.8 lb = 8981 g

volume = 2.7 gallons = 10220 cm³

 

density = 8981g/10220cm³ = 0.88 g/cm³  which is close to the density of oak of 0.9 g/cm³ 

 

The log is oak!