Published by: Adam Żeberkiewicz
Learn more about the Central Office of Measures
read the GUM Guide
Use the mobile app Czas GUM (Time of the GUM)
Experiment - spontaneous synchronization:
Experiment - Figures of Chladni (wiki):
Tables of the International System of Units SI, adopted by the General Conference of Weights and Measures (CGPM), which approved its units, together with their names and designations and prefixes for the purpose of creating multiples and submultiples of basic units and their rules of application.
The tables are also included in the downloadable pdf files.