We explain what is the density and some characteristics of this property. In addition, other types of density that exist.
The term densitye comes from the field of physics and chemistry , in which it specifically refers to the relationship between the mass of a substance (or a body) and its volume . It is therefore an intrinsic property, since it does not depend on the amount of substance considered.
Densitye, property that is usually expressed in kilograms per cubic meter (kg / m 3 ) or gram per cubic centimeter (g / cm 3 ) , varies to a greater or lesser extent depending on pressure and temperature, and also with the state changes.
Typically, gases have a lower densitye than liquids because they have less cohesive particles , and these in turn less than solids . Although there are exceptions, usually increasing the temperature decreases densityee. The densitye defined above is the absolute density ; The relative densitye is the densitye of one substance in relation to another, the apparent density is what characterizes porous materials, such as soil.
The densitye of water is 1 g / cm 3 ; that of lead , for example, is much higher: 11.35 g / cm 3 . It is precisely why in colloquial language, especially among young people, the term “dense” is used (and even “lead”) to qualify a person heavy, burdensome, or a problematic, complex situation Tilda of “dense” ( dense atmosphere, dense conversation, etc.).
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