Аннотация
The article describes the principles of operation of devices that practically determine the activation energies of molecules of liquids, discusses their advantages and disadvantages from each other. Methods for calculating the activation energy by measuring parameters that determine the dynamic and kinematic viscosity coefficients of liquids are shown. The physical meanings of formulas describing the empirical dependence of the relaxation time of molecules using the activation energies, the dynamic viscosity coefficient on the temperature with the activation energy are discussed in detail and analyzed that they have a great influence on a full understanding of the mechanisms of physical processes and phenomena. A way to calculate the kinematic viscosity coefficients using the density and dynamic viscosity coefficients of liquids is shown. Using practical measurements and formulas that express the laws of physics, it was theoretically possible to summarize what parameters the law describing activation energy depends on. Particular attention is paid to the place that the formulas obtained as a result of theoretical calculations occupy in the study of physical phenomena.