Meaning of Pressure

What is Pressure:

What Pressure the force that something does on something else to squeeze or compress it. As such, it is a concept used in different disciplines of knowledge, such as physics, medicine, economics or sociology.

Pressure, on the other hand, can also refer to the force or coercion that a person or a group of people exerts on an individual or a community to determine his actions or conduct.

The word, as such, comes from the Latin pressed, pressionis.

Blood pressure

Arterial pressure, also known as blood pressure or venous pressure, is known as the pressure exerted by blood as it circulates through the arteries. The importance of blood pressure is that it allows blood to circulate through the vessels so that it provides oxygen and nutrients to the body’s organs for their functioning.

Pressure in Physics

In Physics, as pressure we call the relationship between the force exerted by a body (gaseous, liquid or solid) and the surface on which it is applied. It is considered a physical magnitude. Its unit, according to the International System, is the pascal (Pa). The pascal is the equivalent of the total force of one newton acting uniformly on one square meter, that is, N/m2.

See also Hydrostatic pressure.

Atmospheric pressure

Atmospheric pressure is that which air, which is a gas and, as such, is heavy, exerts on everything that is immersed in the Earth’s atmosphere. Its approximate value at sea level is 760 millimeters of mercury (mm Hg) or 1013 millibars (mbar). Thus, we can affirm that atmospheric pressure is the force that, per unit area, the air exerts on the Earth’s surface.

Gauge pressure

Manometric pressure is the one that results from the difference between absolute pressure and atmospheric pressure. As such, it is measured with a device called a manometer. It is only applicable in cases where the pressure is higher than atmospheric pressure, otherwise it is vacuum pressure.

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absolute pressure

As absolute pressure is called that which is obtained from the sum of the atmospheric pressure and the manometric pressure.

Osmotic pressure

As osmotic pressure is known that which takes place in a solution where the particles of a solvent exert pressure on a semipermeable membrane, all this with the purpose of stopping the flow of the solute. Thus, when two solutions come into contact through a semipermeable membrane, the solvent molecules diffuse, moving from the solution with the lowest concentration of solutes to the one with the highest concentration. This phenomenon is known by the name of osmosis, hence, when osmosis occurs, a pressure difference is produced on both sides of the semipermeable membrane, which is what we call osmotic pressure.

Tax pressure

The fiscal pressure is a concept of the economy to refer to the relation between the income of the public treasury and the gross domestic product (GDP) of a country. In this sense, it constitutes the percentage of income that companies and individuals effectively contribute to the State through the payment of taxes.

Social pressure

As social pressure is called the influence that society has, with its beliefs, customs and traditions, on the people who are within it. People do many things due to social pressure, such as getting married, having children, buying things of value, professing a religion or identifying with certain prejudices.