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The "density" of something is a measure of how much it weighs (technically, it's mass) per amount of space it takes up (it's volume). The formula for density is

Density = mass/volume.

So something that is very heavy but doesn't take up much space is considered to have a high density (like lead), but something that is light and takes up a lot of space has a low density (like feathers). So the word "dense" usually refers to things that have a high density.

It is also commonly used colloquially to refer to somebody who is maybe a bit slow to understand things (I think it is reference to their skull being dense, thus not allowing much in or out of their brains!).

Density = Mass / Volume

Plutonium is very dense. Styrofoam isn't. Water has a density of 0.

Density is the consitration of matter in an object

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Owen Leannon

Lvl 10
3y ago

What else can I help you with?