The density of an object or substance is its mass divided by its volume: Density = Mass ÷ Volume. The units of density depend on the units used for mass and volume, but are usually: g/cm³ (if ...

Density describes how much space an object or substance takes up in relation to the amount of matter in that object or substance. It’s the objects volume in relation to its mass. Another way to ...

Objects with the same mass but different volume have different densities. Summary Students use the water displacement method to find the volume of different rods that all have the same mass. They ...

Density is a measure of the mass per unit volume of a substance. Think of it as the amount of mass that a substance packs into the space it takes up. You can calculate the density of any substance by ...

Air Density When it comes to engine performance, you'll hear a lot about air density. What this refers to is the amount of oxygen molecules present in a given volume of air.