berkeman's latest activity
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berkeman replied to the thread Introduction - Tristan Grabski.Welcome to PF. :smile: Please keep in mind that the PF rules (see INFO at the top of the page) do not allow personal speculation or... -
Abbreviation is a long word because it shares a stem with abbreviated, which has to be long because if it were short it couldn't be...
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berkeman replied to the thread Collection of Science Jokes P2.
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berkeman replied to the thread Collection of Lame Jokes.
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berkeman replied to the thread New member interested in gravitation and cosmology.Welcome to PF; it's good to have you here. :smile: Please keep in mind that the PF rules (see INFO at the top of the page) do not...
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It's an equilibrium situation so all the forces are "balanced" by other forces. That's what it means to have a net force of zero. Do...
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berkeman replied to the thread History Einstein's visit to Manchester in 1921.[Note -- A side discussion about starting a new PF subform for "Science History" has been split off into a Feedback forum thread...
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berkeman reacted to Astronuc's post in the thread High School Can alpha radiation make other materials radioactive? with
Informative.
I am aware this thread is about 2.5 years old (OP Aug 9, 2023 with last response Sep 28, 2023), but it is a somewhat important topic... -
Pre-retirement I marked physics exam' papers for Edexcel (and for others). Occasionally examination questions are found to be...
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berkeman reacted to Ferdinandus's post in the thread List of errata available for "QFT in a Nutshell" 2nd edition A. Zee? with
Like.
Thanks for your reply. Good idea! I'll give it a try and keep you posted. -
berkeman reacted to DaveC426913's post in the thread Trying to find a story (YASID) with Informative.
Apparently, it stands for Yet Another Story/Internet Document. New to me too. (Another thing ChatGPT solved for me.)
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berkeman replied to the thread Trying to find a story (YASID).What is "YASID"? Google says either a famous car designer, a Bangladeshi youth organization, or a Palestinian town...
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The relations between the three root ##(r_1, r_2, r_3)## and the quantities ##R## and ##Q## are given in the paper by C. Darwin...
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berkeman replied to the thread 4 of 4 models of automated blood pressure cuffs fail to read my BP.That model also has a very useful feature to report if your heartbeat is irregular (which can often indicate atrial fibrillation...
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berkeman replied to the thread 4 of 4 models of automated blood pressure cuffs fail to read my BP.Yes, sorry for the typo. I will edit the "1" into my post. That company name does sound familiar.
