4 ms·
I've always wondered why the KG was not defined as a certain volume of Water at Sea Level.
by Aloha 13y ago
I've always wondered why the KG was not defined as a certain volume of Water at Sea Level.
- jtjuyjuy 13y agoIt has been defined in the past as the mass of 1L of demineralized water at a specific temperature. Much less precise.
- grecy 13y agoHow do you define the unit used to measure the volume?
- jevinskie 13y agoBy using the well defined meter.
- grecy 13y agoRemind me again what that's defined as?
- nknighthb 13y agoPer http://www.bipm.org/en/CGPM/db/17/1/ http://www.bipm.org/en/CGPM/db/17/1/ "The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second."
- rpearl 13y agogrecy, the meter is the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second. A second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.