What is the concept of density?

Answer 1

The mass per unit of volume. You can use any unit of mass and volume, so density could be grams per milliliter, or kilograms per liter (which is the same thing) or even grams per liter if the substance was very light. I've never seen an imperial density measurement, probably because there is no imperial unit of mass. (Pounds are a unit of force, not mass.)

Answer 2

Density (symbol: ρ - Greek: rho) is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water). The SI unit of density is the kilogram per cubic metre (kg/m3




Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, humans in particular.
For humans, population density is the number of persons per unit of area (which may include or exclude cultivated or potentially productive area). Commonly this may be calculated for a county, city, country, another territory, or the entire world.

Answer 3

Basically how many molecules there are in a specific volume. If there is a trillion molecules in a tennis ball versus a million molecules then the ball with a trillion molecules would be much denser.

Answer 4

It's the proper quantitative description of roughly 85% of the Republican Voter Pool.