In nature, there are a large number of diverse 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 this effect, the term "physical quantity" was introduced.
Pressure force, temperature, friction, and other quantities have their own numerical and alphabetic meanings. Even a similar physical quantity, such as temperature, can be measured in different units, such as Celsius, Fahrenheit or Kelvin scales, and pressure can be measured in pascals or bars.
Many countries use their unique metrics to indicate weight or length. The units of measurement of physical quantities are different. For example, in the UK the distance is estimated in yards and miles, and in Russia, meters and kilometers are already used for this. To unify the testimony, a special SI system was introduced . She allowed to use universal international units of measure in textbooks, books, various projects. It clearly describes the alphabetic and numerical indicators, each physical quantity has its own designation and numerical value.
Technological progress has led to the growth of chemical and oil refineries. Tracking the technological process in modern production 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 process. This is done using
instrumentation, the data from which are sent to the ACS center, where, after processing, the system issues a decision to change or continue working. The automation center can simultaneously process up to several thousand data and respond instantly to the slightest change in pressure or temperature during production. With the help of instrumentation and automation devices it is possible to calculate the consumption of a product, ingredients, calculate the required human and
energy resources, as well as a large amount of other data, which will ensure the clarity and consistency of the process. They allow you to automate production as much as possible, improving the quality of products.
The physical quantity is studied by science metrology. Specialists in this field determine not only the value itself and the designation of the value, but also establish the rules for the permissible
measurement errors for each of the values. They carry out verification and calibration of all measuring instruments, each of which must be registered, have a passport and 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 may have a different numerical value, but the letter designation must comply with international norms and standards.