3 ms·
The term of art is "realisation". The article mentions two realisations but does not elaborate: "In practice, there are currently two known methods for measurin
by sanxiyn 7y ago
The term of art is "realisation". The article mentions two realisations but does not elaborate: "In practice, there are currently two known methods for measuring such masses with great precision. These are known as the Kibble balance and the single-crystal silicon sphere". You should be able to google from that.
- deleted 7y ago[deleted]
- crankylinuxuser 7y agoI never understood why a sphere was even in the discussion of a standardized atomic count. Any rational fractions using pi = pi atoms or molecules. And that's absurd to have r=(3V/4pi)^1/3 . No matter how you mess with it, it's irrational to the extreme! Now.. Face-centered or ody-centered cubic follows a nice quadratic expansion for integer based counting. We don't need no steenkin pi's!
- protonfish 7y agoIt's not difficult to round to the nearest atom.
- fl0wenol 7y agoBecause it's easiest to polish perfectly and verify the diameter of if there's no preferrer orientation. Edges of any kind are liable to wear.