Question

A piece of wood of mass 150 g has a volume of 200 cm cube .what is the density of wood in a) CGS system
b) SI system

Answer 1

Explanation:

Density = Mass / Volume

a) CGS (g/cm³)

150/200 = 0.75 g/cm³

b) SI (kg/m³)

150g = 150/10³ kg

200cm³ = 200/10⁶ m3

0.150/0.0002 = 750kg/m³

Answer 2

Answer:

Your answer will be :

a. 0.75 g/$cm^{3}$

b. 750 kg/$m^{3}$

Explanation:

We have given ;

                           mass or m = 150 g;

                          volume or v =200 m;

Now,  we know that density is given by ;

              ρ = m/v                                

here, ρ = Density;

         m= mass of the object;

        v = volume of the object;

a. Since, given facts are already in CGS unit, hence direct apply the formula;

             putting the value in the formula;

                 ρ = 150/200;

                    = 0.75 g / cm cube;

b.  Since, given facts are in CGS unit, hence we change all the unit in SI unit first then we apply the formula;

                       m or mass = 150 g

                                         = 150 / 1000

                                         = 0.15 g

                      v or volume = 200cm cube;

                                           = 200 / 1000000 ;  {1 cm cube = 1/1000000 m cube}

                                           = 0.0002 m cube

             putting the value in the formula;

                 ρ = 0.15/0.0002;

                    = 750 kg / m cube;

That's all.