The 2019 SI System Redefinitions

Have you ever wondered how a system of measurement is determined and verified? Come on in!

0:00 Intro
5:58 The Meter
12:34 The Second
21:50 The Kelvin
30:46 The Mole
43:04 The Kilogram

Various Sources of Info:

https://www.nist.gov/si-redefinition/meter
https://en.wikipedia.org/wiki/History_of_the_metre
https://en.wikipedia.org/wiki/Henri_Tresca
https://en.wikipedia.org/wiki/Neutral_plane
https://en.wikipedia.org/wiki/Airy_points
https://en.wikipedia.org/wiki/Isotopes_of_gold
https://en.m.wikipedia.org/wiki/Hyperfine_structure
https://en.wikipedia.org/wiki/Caesium_standard
https://www.nist.gov/si-redefinition/second-past
https://www.nist.gov/si-redefinition/second-present
https://www.nist.gov/si-redefinition/second-future
https://www.bipm.org/en/cgpm-2022/resolution-5
https://www.nist.gov/topics/physics/optical-frequency-combs
https://www.nist.gov/news-events/news/2006/07/mercury-atomic-clock-keeps-time-record-accuracy
https://www.livescience.com/32660-how-does-an-atomic-clock-work.html
https://physics.stackexchange.com/questions/191871/why-do-atomic-clocks-only-use-caesium
https://www.thenakedscientists.com/forum/index.php?topic=12732.0
https://en.wikipedia.org/wiki/Isotopes_of_hydrogen
https://en.wikipedia.org/wiki/Isotopes_of_oxygen
https://www.nist.gov/si-redefinition
https://www.bipm.org/en/publications/si-brochure
https://en.wikipedia.org/wiki/General_Conference_on_Weights_and_Measures
https://en.wikipedia.org/wiki/Metre_Convention
https://en.wikipedia.org/wiki/International_System_of_Units
https://www.bipm.org/en/history-si/kilogram
https://en.wikipedia.org/wiki/Vienna_Standard_Mean_Ocean_Water
L Pitre et al 2017 Metrologia 54 856
https://doi.org/10.1016/j.crhy.2018.11.007
https://en.wikipedia.org/wiki/Amedeo_Avogadro
https://en.wikipedia.org/wiki/Avogadro_constant
https://en.wikipedia.org/wiki/Law_of_definite_proportions
https://physics.stackexchange.com/questions/364340/why-are-scientists-involved-in-the-avogadro-project-using-silicon-28-atoms-inste
https://en.wikipedia.org/wiki/Monoisotopic_element
https://en.wikipedia.org/wiki/Isotopes_of_silicon
https://iopscience.iop.org/article/10.1088/0026-1394/48/2/E01/pdf
https://www.rsc.org/periodic-table/element/14/silicon
https://iopscience.iop.org/article/10.1088/1681-7575/aa7a62/pdf
https://www.nrc.gov/materials/fuel-cycle-fac/ur-enrichment.html
https://en.wikipedia.org/wiki/Calcium_hydride
https://en.wikipedia.org/wiki/Silane
https://en.wikipedia.org/wiki/Kibble_balance
https://en.m.wikipedia.org/wiki/International_Prototype_of_the_Kilogram
https://en.m.wikipedia.org/wiki/Grave_(unit)
http://charm.physics.ucsb.edu/courses/ph21_05/kilogrampaper.pdf
https://en.m.wikipedia.org/wiki/Alternative_approaches_to_redefining_the_kilogram
https://en.m.wikipedia.org/wiki/Kibble_balance
https://physics.stackexchange.com/questions/488334/how-can-i-explain-what-a-kilogram-is-using-plancks-constant
https://nvlpubs.nist.gov/nistpubs/jres/123/jres.123.021.pdf
https://iopscience.iop.org/article/10.1088/1681-7575/aa70bf/pdf
https://iopscience.iop.org/article/10.1088/1681-7575/aa7bf2/pdf
https://www.physicsclassroom.com/class/estatics/Lesson-4/Action-at-a-Distance
https://en.wikipedia.org/wiki/Brian_Josephson
https://en.wikipedia.org/wiki/Josephson_effect
https://www.nist.gov/si-redefinition/kilogram-kibble-balance
https://www.nist.gov/si-redefinition/kilogram-mass-and-plancks-constant
https://www.physics.umd.edu/courses/Phys798S/AnlageSpring16/The%20Josephson%20Effect%20and%20e%20over%20h-Clarke.pdf
https://en.wikipedia.org/wiki/Quantum_Hall_effect
https://watermark.silverchair.com/913_1_online.pdf
https://www.bipm.org/documents/20126/41489673/SI-App2-kilogram.pdf/5881b6b5-668d-5d2b-f12a-0ef8ca437176
https://www.bipm.org/en/publications/mises-en-pratique/
https://physics.stackexchange.com/questions/147433/what-are-the-proposed-realizations-in-the-new-si-for-the-kilogram-ampere-kelvi
https://www.nature.com/articles/nphys4029

Have an idea for a video? Shoot me an email at [email protected]!

#PhDatLiving #SISystem #Chemistry

These videos are for educational and informational use only, and PhD at Living assumes no liability for property damage or injury incurred as a result of the use of any of the information contained therein. All use of any information provided on this channel is solely at your own risk, and this information is neither a substitute of nor a replacement for professional medical advice, diagnosis, or treatment. Remember - I'm just some guy on the Internet.

Тэги:

#phdatliving #phd_at_living #chemistry #science #chemistry_education

Скачать видео