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--- announcements [2019/05/06 12:50] – janettate
+++ announcements [2020/03/06 09:12] (current) – external edit 127.0.0.1
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 ====== Old Announcements ======
 Current announcements are on the [[start|syllabus]] page.
+=== 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 ===
+Some solid state physics in the news - ice-XVIII.
+[[https://physicstoday.scitation.org/do/10.1063/PT.6.1.20190517a/full/|https://physicstoday.scitation.org/do/10.1063/PT.6.1.20190517a/full/]]
+=== 5/12/2019 ===
+The first part of hwk 5 has been posted.
 === 5/6/2019 ===

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