There is a rough correlation between density of a wood and its strength (mechanical properties).

We can build a relationship between resolution and density of localizations.

Although now racially integrated the demarcation between low, medium and high density still remains.

The ratio between pressure and density is temperature dependent - as per the ideal gas law.

As expected, an inverse relationship exists between grafting density and molecular weight.

That number, known as w, is the ratio between the pressure and density of dark energy.

With the fundamental diagrams researchers can explore the relationship between speed, flow, and density of traffic.

Data show a weaker relationship between flow and density in congested conditions.

There appears to be a modest negative correlation between size and density.

"It is, in the face of increasing population, between density and sprawl."