• Sunday October 17,2021

Density

We explain what density is and some characteristics of this property. In addition, other types of density exist.

The gases have a lower density than liquids and these are lower than solids.
  1. What is density?

The term density 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.

Density, 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 in function of pressure and temperature, and also with changes in state.

Typically, gases have a lower density than liquids because they have less cohesive particles, and these in turn less than solids. Although there are exceptions, usually increasing the temperature decreases density. The density defined above is the absolute density; The relative density is the density of a substance in relation to another, the apparent density is what characterizes porous materials, such as soil.

The density of water is 1 g / cm 3 ; that of lead, for example, is much higher: 11.35 g / cm 3 . It is precisely for this reason that in the colloquial language, especially among young people, the term dense (and even, lead ) is used to qualify a person heavy, heavy, or a complex, problematic situation, it is called dense (dense atmosphere, dense conversation, etc.).

  • On the web: Density and some exercises solved.
  1. Other types of density

A low bone mineral density can trigger osteoporosis.
  • Population Density In the area of ​​demography, an important concept is that of population density, which refers to the number of inhabitants per square kilometer. China and India are examples of countries with very high population density, while the Nordic countries and Oceania have low population density. Areas of high population density are often associated with housing problems, air pollution, insufficient public services infrastructure, among others.
  • Optical density This physical parameter constitutes the absorption of an optical element at a given wavelength per unit distance. This data is used to assess cell content, smoke quality generated by different substances, laser power, filters, etc.
  • Density of electrical current. It is the relationship that exists between the intensity of electric current that circulates through a conductor per unit of time and per unit of cross section.
  • Density of magnetic flux. Also called "magnetic induction, " it is the magnetic flux that causes a moving electric charge for each unit of area normal to the direction of the flow.
  • Bone mineral density. In the medical field, this measure refers to the amount of minerals per unit area. It is usually expressed in g / cm 2 and is established for certain bones specifically, such as the femur or lumbar spine. A low bone mineral density can trigger osteoporosis, a disease in which the bones are found with a very low proportion of minerals (mainly calcium), so they become too porous and therefore fragile and brittle, thus increasing the risk of people to suffer fractures.

More in: Density of matter.

Interesting Articles

Bank Credit

Bank Credit

We explain to you what a bank loan is and where the borrowed money comes from. In addition, the importance of this instrument in the economy. Bank loans have a high impact on the economy of the countries. What is bank credit? A credit is a financial operation where an entity grants another one an amount of money in an account at its disposal, committing the second to return all the money taken, paying in addition It is an interest in the use of that amount

Frequency

Frequency

We explain what a frequency is and what is the way to measure this magnitude. In addition, the different meanings of this term. Frequency must be measured by hertz. What is frequency? The frequency is a magnitude that measures the number of repetitions an event can have per unit of time. The SI (International System of Units), which is the system of units used by most countries in the world, says that the frequency must be measured by hertz (Hz)

Marxism

Marxism

We explain to you what Marxism is and what this doctrine implies. Other concepts such as alienation, class struggle, surplus value. Marxism has as its basic postulate the dissolution of capitalist society. What is Marxism? Marxism has been the doctrine that has influenced the great political-economic and ideological system with which capitalism has had to fight during the nineteenth century, but mainly during the twentieth century: communism

Paradigm

Paradigm

We explain what a paradigm is and the different processes that must be followed. In addition, its definition in linguistics and social sciences. In linguistics a paradigm is a set of very varied words and in context. What is a paradigm? The concept of paradigm reflects something specific that works as an example to follow

Pesticides

Pesticides

We explain what pesticides are, what types of pesticides exist and why they are dangerous. In addition, organic pesticides. Pesticides protect agricultural products from unwanted species. What are pesticides? Pesticides, pesticides or biocides are a type of chemical compounds intended to repel, destroy, prevent or combat any undesirable species of plants or animals

Freedom of expression

Freedom of expression

We explain to you what freedom of expression is and how this human right originated. In addition, its limits and freedom of expression on the Internet. Freedom of expression is an elementary medium for the dissemination of ideas. What is freedom of expression? Freedom of expression is that right that every human being must enjoy, freely express their opinions , be able to publish or communicate them and that, in turn, the rest of the people respect them