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Astronuc's latest activity
Astronuc
replied to the thread
History
For WW2 buffs!
.
I will have to research the matter. I watched a couple of videos from the same series last night. One story was about the USS Iowa...
Wednesday, 6:42 AM
Astronuc
reacted to
Borg's post
in the thread
History
For WW2 buffs!
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Like
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I wanted to find out more about this but I found nothing. After I had a conversation with ChatGPT where it scoured naval records, this...
Wednesday, 6:27 AM
Astronuc
replied to the thread
History
For WW2 buffs!
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An interesting story - How One Cook's "INSANE" Idea Stopped U-Boats From Acoustically Detecting Convoys The story apparently...
Tuesday, 1:52 PM
Astronuc
replied to the thread
Ferris Eugene Alger
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Certainly, during WWII and perhaps WWI. The US government does have a provision for 'secret patents' or 'classified patents', which...
Monday, 2:30 PM
Astronuc
replied to the thread
Ferris Eugene Alger
.
Patents are not classified. Patents are filed with the Patent & Trademark Office (PTO) and are published in the public domain. Often...
Monday, 7:59 AM
Astronuc
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robphy's post
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RIP Chen Ning Yang (1922-2025)
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https://news.stonybrook.edu/university/c-n-yang-nobel-prize-winning-physicist-defined-stony-brooks-scientific-excellence/...
Monday, 7:55 AM
Astronuc
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pines-demon's post
in the thread
RIP Chen Ning Yang (1922-2025)
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Amazing age and amazing number of contributions. I wonder if we will ever know why he was not in terms with Lee.
Monday, 7:52 AM
Astronuc
reacted to
robphy's post
in the thread
RIP Chen Ning Yang (1922-2025)
with
Care
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https://en.wikipedia.org/wiki/Yang_Chen-Ning ( photo from http://insti.physics.sunysb.edu/~yang/ )...
Monday, 7:50 AM
Astronuc
reacted to
Borg's post
in the thread
Medical
New Alzheimer's Treatment Clears Plaques From Brains of Mice Within Hours
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I've been reading a bunch of articles in this month's Scientific American on Alzheimer's and ran across this article in a web feed that...
Saturday, 6:35 AM
Astronuc
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Ibix's post
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I
How Can Photons Be Massless Yet Have Energy According to Einstein's Equations?
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That formula is only correct for stationary massive objects. The general formula is ##m^2c^4=E^2-p^2c^2##, from which you can see that...
Oct 17, 2025
Astronuc
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PeroK's post
in the thread
I
How Can Photons Be Massless Yet Have Energy According to Einstein's Equations?
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Like
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The equation ##E = mc^2## only applies to a particle with mass. And, indeed, that's its energy only when it is at rest. The full...
Oct 17, 2025
Astronuc
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PeterDonis's post
in the thread
B
Photon Energy Without Rest Mass – How?
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It only applies to particles with rest mass that are at rest. See below. Yes. The general equation is $$ E^2 = p^2 c^2 + m^2 c^4 $$...
Oct 17, 2025
Astronuc
posted the thread
RIP Susan Stamberg (87), NPR 'founding mother'
in
General Discussion
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NPR 'founding mother' Susan Stamberg has died https://www.npr.org/2025/10/16/1184880448/susan-stamberg-obituary For those outside the...
Oct 16, 2025
Astronuc
replied to the thread
SpaceX
SpaceX Starship development: 7th flight January 10
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Looking back 10 years - https://www.physicsforums.com/threads/spacex-interplanetary-transport-system.887117/ One person who was key to...
Oct 16, 2025
Astronuc
replied to the thread
Technical Analysis on Titan Sub (Titanic Sub)
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Titan submersible imploded due to poor engineering https://www.bbc.com/news/articles/cdeg7y4171xo Hull Failure and Implosion of...
Oct 16, 2025
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