Search for "SI base units" in article titles:

1. Proposed redefinition of SI base units: The International Committee for Weights and Measures (CIPM) has proposed revised definitions of the SI base units, for consideration at the 26th General Conference on Weights and Measures (CGPM). It is expected that the formal vote, scheduled for 16 November ... [100%] 2023-10-27 [SI units]
2. 2019 redefinition of the SI base units: In 2019, four of the seven SI base units specified in the International System of Quantities were redefined in terms of natural physical constants, rather than human artifacts such as the standard kilogram. Effective 20 May 2019, the 144th anniversary ... (Definition of the units kg, A, K and mol) [92%] 2022-09-27 [SI units] [2018 in science]...
3. Historical definitions of the SI base units: Since it's introduction in 1960, the base units for the International system of units, known as SI, have changed several times. Tables in this article summarize those changes. [92%] 2024-07-23 [SI units]
4. 2005–2019 definitions of the SI base units: From 2005 to early 2019, the definitions of the SI base units were as follows. [92%] 2024-07-23 [SI units]