berkeman's latest activity
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berkeman reacted to Astronuc's post in the thread High School ASASSN-15lh (aka SN 2015L), a superluminal supernova, or hypernova? with
Wow.
My wife was listening to a video about superluminal supernova (Type Ic), ASASSN-15lh, or SN 2015L. It was discovered through the All Sky... -
berkeman replied to the thread Interested in quantum foundations, quantum gravity, science philosophy.Welcome to PF.
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berkeman replied to the thread An active mind....Welcome to PF, Graeme. It's good to have you here. In addition to the main PF forums, be sure to click into the "Insights Blog" link...
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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...
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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...
