Concept in Definition ABC

In its broadest use the word density refers thickness and concentration.
“Many students left his chair as a result of the density of the books he sent to study.”

Thickness and concentration of something

The concept can be applied in different contexts and subjects, so it is applied by physics and chemistry as we will see later, it is used in relation to people who attend a public or private space, and this allows us to evaluate the little or much attendance to it, for For example, to a theatrical show, if most of the seats are empty it will be an indicator of the small number of people that attracted the same.

Physics: relationship between mass and volume of a substance or body

On the other hand, at the request of the chemistry and physics density is relationship established between mass and volume of a substance or body. For example, an object, even if it is small but if it is made of lead, will be denser than another, of larger dimensions, but made of cork or foam.

Density can be measured directly or indirectly.
Indirect density measurement involves measuring mass and volume separately and then calculating the density. Mass is measured with a balanceInstead, volume can be measured by determining the shape of the object.

There are bodies that are capable of floating in water, such is the case of the wood or oil, and this is so because they are less dense than these, meanwhile, other materials have a higher density than them. allows us to sink into the water, such is the case of a stone, or eggs, which allows us to boil them and make the famous egg food Lasted.

Solid bodies are measured in scales as we said and thus we will know the magnitude of their mass, and submerging it in water allows us to know the volume. Both results, mass and volume, will allow us to know the density.

Instruments for measuring density

Meanwhile, among the instruments with which densities are commonly measured are: the hydrometer (measures density of liquids) and can be replaced by a graduated glass and an accurate measurement is obtained as with this instrument, the pycnometer (measures solids, liquids and gases), hydrostatic balance (measures densities of solids) and Mohr's scale (gives the precise density of a liquid).

Meanwhile, pressure and temperature are two conditions that directly affect the variation of the density of a substance.

Population density: number of inhabitants per unit area

For its part, it is called as population densityto the number of inhabitants per unit area, either continent, state, country, province, district, county, among others, that is, the density of population = Population / Area.

Generally, in a country, urban regions turn out to be those with a higher population density, compared to rural ones, for example.

In as much and being almost a paradox, those more densely populated regions tend to be very small, compared to the less populated ones, which have long distances in kilometers.

This situation, quite frequent today, presents a problem at the housing level, in large cities, for example, which is where such a state of affairs occurs, there is not enough space to house so many people and in contrast, in the contexts rural areas, development is not feasible in this sense because there are not enough people living in the developments buildings.

Thus, in large cities, people live as is popularly said next to each other, without spaces, while in the countryside large territorial areas, without buildings, give the sensation of spaciousness.

For example, many people, tired of the stress of the city and this question of having to live in certainly reduced spaces because there is no longer room for many more buildings, or for large buildings, it is that you decide to settle in suburban areas, or in the countryside, to precisely find what the city lacks: tranquility, space and color green…

Now, there are also those who do not care about anything, not having enough space and having to live close to others, because they love the benefits that large cities have, means of transport everywhere, places of entertainment, greater labor and educational offer, among others.

Topics in Density