%0 Journal Article %T Two Problems of Time Entering Respectively the Relativistic Mechanics and Electron Transport in Quantum Theory %A Stanis£żaw Olszewski %J World Journal of Mechanics %P 186-197 %@ 2160-0503 %D 2020 %I Scientific Research Publishing %R 10.4236/wjm.2020.1010013 %X In the relativistic mechanics, we calculate a minimal distance between the time scale of a one-dimensional motion having a larger velocity and the time scale of a similar motion with a lower velocity. Concerning the quantum theory, we demonstrate that mechanical parameters entering the electron motion in the Bohr hydrogen atom can provide us with a correct size of the time interval entering the Joule-Lenz law for the emission energy between two neighbouring quantum levels of the atom. %K Time in the Special Relativity Theory %K Time in the Quantum Theory of the Bohr Atom %K Joule-Lenz Law for the Emission of Energy in the Atom %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=103560