Air properties
Nature does not tolerate emptiness. Every free centimeter, if it is not filled with a material body, is immediately filled with air. About what the properties of the air, what is its peculiarity and how it can be studied, we will talk in today's article.
What is air?
Air is what we breathe. It consists of a natural mixture of gases and is necessary for all living things on earth: man, animals, plants, etc. When we breathe in the air, oxygen enters our body, which gets into the blood and gives the necessary vital energy. Without air, a person can live no more than five minutes, which makes him the most important element of the environment.
The air forms an atmosphere - a shell around our planet Earth, which allows us to breathe and live peacefully. Understand what air can be, if you thoroughly disassemble what properties of air.
Temperature
A temperature is a quantity by means of which the degree of heat of air is measured. The air is measured in three scales:
- Celsius,
- Fahrenheit,
- Kelvin.
The Celsius scale is used to measureair temperatures in the CIS countries. Accordingly, 0 is the starting point of reference, at this temperature, ice begins to melt, that is, water passes from the solid state to the liquid state. At 100 degrees Celsius, water boils and begins to evaporate, passing from the liquid state to the gaseous state.
Pressure
Air pressure is the force with whichit affects all other objects. Each of us is under pressure of air. It would seem, how is this possible, if the air is not weightless, we do not feel it, we do not see and can not feel it? But in fact, air also has its mass, like any other element in the environment. Simply, its mass is so small, in comparison with our own and with a mass of other material objects, that we do not feel it. The air pressure is explained by the force of attraction of the magnetic core of the Earth.
Density
The density of air is the amount of air per cubic meter (1m3). The density depends on the pressure and temperature of the air: when heated, the air expands and its density decreases. Accordingly, when the temperature decreases, the air is compressed, pressure acts on it, and its density becomes higher. The density of air varies depending on the layer of the atmosphere and the distance from the globe. The closest to the Earth is the density of air, and the farther from Earth, the lower the temperature, the higher the pressure and, correspondingly, the greater the density of air.
There is no taste, color or smell.
Along with natural properties, there are physical properties of air.
Inertness
This unwillingness to move from onestate to another. He initially gravitates toward stability - a state of rest or even motion. If he tries to bring him to another state, he will resist. And the more this resistance, the more air density will be.
Viscosity
Air molecules have their own constant speedchaotic movement. When heated, it accelerates, and when cooled, it decreases. But if a stream of rapidly moving warm air molecules is added to a stream of cold air with a slow movement, then there will be mutual changes. Slow molecules of cold air will cool the warm air and, accordingly, slow down their movement. In turn, the fast molecules of warm air will warm up the cold and accelerate the movement of its molecules.
Compressibility
Air is compressed and expanded by pressure and temperature. From high temperature and low pressure, air expands, air is compressed from low temperature and high pressure.
All this will help you to better know the world around you. Air properties are as important as the properties of any other substance, so they need to be known and understood by everyone.
