berkeman's latest activity
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berkeman replied to the thread Hello from a new member interested in theoretical physics work.Welcome to PF. Please keep in mind that the PF rules (see INFO at the top of the page) do not allow personal speculation or personal... -
berkeman reacted to Chestermiller's post in the thread Undergrad Difference calculating enthalpy change by using thermodynamic table A-17 vs. A-2 with integration with
Informative.
The table in the first method used integration with respect to temperature also. It would seem to be a matter of the difference in the... -
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...
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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...
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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...
