This article presents the results of measuring the calorific value and the rheological characteristics of Plantohyd bio lubricants. Measurements were conducted under laboratory conditions with an IKA C5000 calorimeter and a DV-3P Anton Paar digital viscometer. Results are presented graphically. It is shown that the physical interpretation of energy values results ​​and the dependence of rheological properties on temperature can be used to assess the quality of lubricants.

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The aim of the current report is to find the mathematical equation describing the dependence on resistivity and dielectric permittivity of frequency for multilayer soil. Experiments have been taken for the researched dependencies for the particular field of future substation.