How do you calculate density of matter?

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How do you calculate density of matter?

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Answer 1 · 2015-05-05T00:42:48

Density is defined as mass per volume-unit.

So you first need to know the mass of an object. You can do this by weighing it.

Then you want to know the volume . If your object is of a regular form, e.g. a block, you can calculate length x width x height. In other cases you can submerge the object in water (in a graduated cylinder) and note the difference in water level.

After that, it's: density=mass/volume, or $ρ = \frac{m}{V}$ $rho=m/V$

Extra:
Officially, density is expressed in the unit $k g / m^{3}$ $kg//m^3$ , but as this would lead to high figures (water has $ρ = 1000 k g / m^{3}$ $rho=1000 kg//m^3$ ), often the density is expressed in $k g / d m^{3} or g / c m^{3}$ $kg//dm^3 or g//cm^3$ (they have the same numerical value). So mercury would have an official density of $13.6 \cdot 10^{3} k g / m^{3}$ $13.6*10^3 kg//m^3$ but usually this is just abbreviated to $13.6$ $13.6$ (this is called relative density, water being 1)

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How do you calculate density of matter?

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