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announcements [2019/05/20 10:27] – janettateannouncements [2019/05/20 10:40] – janettate
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 ====== Old Announcements ====== ====== Old Announcements ======
 Current announcements are on the [[start|syllabus]] page. Current announcements are on the [[start|syllabus]] page.
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 +=== 5/20/2019 ===
 +Today is [[http://www.worldmetrologyday.org/|World Metrology Day]], and we have a new kilogram standard!  Read about it at the [[https://www.nist.gov/si-redefinition|National Institute of Standards and Technology (NIST)]] site. Here is a [[https://www.vox.com/science-and-health/2019/5/17/18627757/kilogram-redefined-world-metrology-day-explained|Vox article]] that does a reasonable job of discussing it for the layperson (but note the error in the discussion of the units of Planck's constant!).
  
 === 5/20/2019 === === 5/20/2019 ===

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