08 August 2016 0 6K Report

Dear Sirs,

From kinematics we know that a reference system comprises a coordinate system and a watches. How do we practically create a particular reference system?

How do we choose watches? For example it is impossible to check that the clock is ticking evenly.

How do we create rectangular usual coordinate system?There are questions about applicability of Euclid geometry in reality. In reality we have no two infinite parallel lines and we have no irrational numbers of the real object length (Archimedean axiom is not true in reality).So how we can apply the Euclid geometry theorems to reality?

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