In nature, there are a large number of a wide variety of forces that affect objects and the environment. Each of them has its own unique nature and has a certain impact on the environment. To study and measure such an impact, the term "physical quantity" was introduced. Pressure force, temperature, friction and other quantities have their own numerical and alphabetic value. Even a similar physical quantity, such as temperature, can be measured in different units such as Celsius, Fahrenheit or Kelvin, while pressure can be measured in pascals or bars.
Many countries use their own unique indicators to indicate weight or length. Units of measurement of physical quantities are different. For example, in the UK, the distance is estimated in yards and miles, while in Russia, meters and kilometers are already used for this. To unify the testimony, a special SI system was introduced. It allowed textbooks, books, and various projects to use universal international units of measurement. It clearly spells out letters andnumerical indicators, each physical quantity has its own designation and numerical value.
Technological progress has led to the growth of chemical and oil refineries. Monitoring of the technological process in modern industries is carried out by automatic production control systems. For its proper functioning, it is necessary to constantly measure the physical quantities that are involved in the technological process. This is carried out with the help of control and measuring instruments, the data from which are sent to the ACS center, where, after processing them, the system issues a decision to change or continue work. The automation center is capable of simultaneously processing up to several thousand data and instantly responding to the slightest change in pressure or temperature during production. With the help of I&C devices, it is possible to calculate the consumption of the product, ingredients, calculate the required human and energy resources, as well as a large amount of other data, thanks to which the clarity and consistency of the technological process will be ensured. They allow you to automate production as much as possible, improving the quality of products.
Physical quantity is studied by the science of metrology. Experts in this field determine not only the value itself and the designation of the quantity, but also establish regulations on the permissible measurement errors for each of the values. They check and calibrateall measuring instruments, each of which must be registered, have a passport and be checked for compliance with its technical characteristics.
Physical quantity is a unit of measurement that allows you to get an idea of the strength of the impact. It can have a different numerical value, but the letter designation must comply with international norms and standards.
