%0 Journal Article %T Difference between the Time Intervals in the Special Relativistic Theory Calculated with the Aid of an Invariance Property between the Mechanical Expressions %A Stanis£żaw Olszewski %J Journal of Modern Physics %P 2031-2040 %@ 2153-120X %D 2021 %I Scientific Research Publishing %R 10.4236/jmp.2021.1214116 %X In the relativistic mechanics, we obtain a difference 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. This calculation does involve usually also the differences of parameters other than time. Basing on the invariance of a pair of the mechanical parameters, it can be shown that the difference of two scales of time can be attained independently from the differences of the other physical parameters. %K Time in the Special Relativity Theory %K Relativistic Invariance of Some Special Differences of the Mechanical Parameter %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=114374