Question

Different kinds of wood have different densities. The density of oak wood is generally 0.7 g/cm If a 35 cm ^ 3 piece of wood has a mass of 25 g, is the wood likely to be oak?

Answer 1

Answer: Yes, the piece of wood is likely to be oak.

Explanation:

Density measures the mass of an object or substance per volume, and is written as:

              $d= \frac{m}{v}$

let d1= the density of oak (0.7 g/cm)

and d2= the density of the piece of wood

        ∴ for the piece of wood, given that:

          ...its mass, m= 25g

         & its volume, v= $35cm^{3}$

       

        $d_{2}  = \frac{25 g}{35cm^{3}} = 0.7 g/cm$ (to 1 decimal place)

∴ d1 = d2  

...the densities are the same; d2 is likely to be of the same material, oak wood