Question

If the mass of an object is 4 kg while its volume is 20 `m^3`, what would its density be?

Answer 1

`0.2(kg)/(m^3)`
or
`2 xx 10^(-4) g/(cm^3)`

Explanation:

The equation for density:

`rho = m/V`

Plug in known values, if your answer is in units of `(kg)/(m^3)`:

`rho = (4kg)/(20m^3) = 0.2(kg)/(m^3)`

A more conventional unit for density is `g/(cm^3)`. The conversion to this is:

`0.2(kg)/(m^3)((10^3g)/(1kg))((1m^3)/(100^3cm^3)) = 2 xx 10^(-4) g/(cm^3)`