Density: Difference between revisions
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'''Maddy - we talked about the nuclear density as a video for this page? We just need to split those up, perhaps some can go in the text? - Jason''' | |||
Density is usually taken to mean '''mass density''' as opposed to [[energy density]]. <onlyinclude>'''Density''' refers to the ratio between the [[mass]] and [[volume]] of an object.</onlyinclude> Objects with high density have a lot of mass compared to a small amount of volume (like a lead brick). Objects with low density have a small mass compared to a lot of volume (like an inflated party balloon). | Density is usually taken to mean '''mass density''' as opposed to [[energy density]]. <onlyinclude>'''Density''' refers to the ratio between the [[mass]] and [[volume]] of an object.</onlyinclude> Objects with high density have a lot of mass compared to a small amount of volume (like a lead brick). Objects with low density have a small mass compared to a lot of volume (like an inflated party balloon). | ||
Revision as of 17:29, 18 June 2021
Maddy - we talked about the nuclear density as a video for this page? We just need to split those up, perhaps some can go in the text? - Jason
Density is usually taken to mean mass density as opposed to energy density. Density refers to the ratio between the mass and volume of an object. Objects with high density have a lot of mass compared to a small amount of volume (like a lead brick). Objects with low density have a small mass compared to a lot of volume (like an inflated party balloon).
The SI unit of density is kilograms/cubic meter. Density is often measured in grams/litre, kilograms/liter, and in imperial, pounds/cubic foot.
The density of air is approximately 1.2 kg/m3 near the surface of the Earth. The density of water is exactly 1000 kg/m3. Here's a table of densities of common substances. To learn more about density please visit hyperphysics.