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===About Density===
: The [[SI Unit|units]] of [[density]] are kg/m<sup>3</sup>.
: An [[object]] with a large amount of [[mass]] in a small [[Volume (Space)|volume]] is said to have a high [[density]].
: An [[object]] with a small amount of [[mass]] spread over a large [[Volume (Space)|volume]] is said to have a low [[density]].
{| class="wikitable"
|[[File:ParticleModelSolidLiquidGas.png|center|500px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Solid]]s are the most '''dense ''' [[State of Matter|state of matter]] because there are a large number of [[particle]]s in a certain [[Volume (Space)|volume]] and [[gas]]es are the least '''dense''' [[State of Matter|state of matter]] because there are a small number of [[particle]]s in a the same [[Volume (Space)|volume]].
|}
|[[File:ParticleModelSolidLiquidGas.png|center|500px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Solid]]s are the most '''dense ''' [[State of Matter|state of matter]] because there are a large number they have the largest amount of [[particlematter]]s in a certain per unit [[Volume (Space)|volume]] and [[gas]]es are the least '''dense''' [[State of Matter|state of matter]] because there are a small number they have the smallest amount of [[particlematter]]s in a the same per unit [[Volume (Space)|volume]].
|}
:<math>\rho = \frac{m}{V}</math>
Where:
: ρ = The [[density]]of the [[object]].: m = The [[mass]]of the [[object]].: V = The [[Volume (Space)|volume]]taken up by the [[object]].
===Example Calculations===
{| class="wikitable"
|-
| style="height:20px; width:200px; text-align:center;" |'''5000[[kg]] of [[Iron]] has a [[volume]] of 0.635m<sup>3</sup>. Calculate the density of [[Iron]] correct to two [[Significant Figures|significant figures]].'''| style="height:20px; width:200px; text-align:center;" |'''A 50,000cm<sup>3</sup> container of [[water]] is full with a 50[[kg]] [[mass]] of [[water]]. Calculate the density of [[water]] correct to two [[Significant Figures|significant figures]].'''| style="height:20px; width:200px; text-align:center;" |'''A 200,000cm<sup>3</sup> [[volume]] of [[air]] has a [[mass]] of 245[[g]]. Calculate the density of [[air]] correct to two [[Significant Figures|significant figures]].
|-
| style="height:20px; width:200px; text-align:left;" |
:<math>\rho = 7874kg/m^3</math>
:<math>\rho \approx 7900kg/m^3</math>
| style="height:20px; width:200px; text-align:left;" |
[[Mass]] = 50[[kg]]
:<math>\rho = 1.225kg/m^3</math>
:<math>\rho \approx 1.2kg/m^3</math>
|}