FactChecker's latest activity
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FactChecker reacted to javisot's post in the thread High School Are we alone out there? The mystery of life in the Universe with
Like.
Greetings. If those are the two options, I personally choose the scenario where we first discover microbial life (assuming it exists)... -
FactChecker replied to the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong?.That is true, but I like that the geometric algebra shows that it all comes from one concept/methodology, based on very basic...
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FactChecker reacted to Nugatory's post in the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong? with
Haha.
Perhaps. But the work of Dunning and Kruger will remain as relevant as ever. -
FactChecker replied to the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong?.That depends on the size of the T-shirt and the beer-belly it was covering. I could do it. :-p
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FactChecker reacted to PeterDonis's post in the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong? with Haha.
I'm glad it got reduced to 4. (One thing I never found out was whether anyone had made a T-shirt with the tensor formulation, which...
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FactChecker reacted to Hornbein's post in the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong? with
Wow.
Maxwell originally had about 20 equations using quaternions. That went out of style. -
FactChecker replied to the thread Undergrad Was Richard Feynman's explanation of the twin paradox wrong?.Although Feynman's statement might be incomplete, IMO it addresses the main misconception that leads people to think there is a paradox...
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FactChecker reacted to PeroK's post in the thread Undergrad Does Time Dilation mean we are each alone in our own bubble? with Haha.
If you find yourself alone on a Saturday night, you cannot blame the laws of physics.
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FactChecker replied to the thread Undergrad Does Time Dilation mean we are each alone in our own bubble?.Suppose a person is 5 feet from you. You might not be immediately affected by what he is doing now, but you are being affected by what...
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FactChecker reacted to loop quantum gravity's post in the thread Graduate Evolute of an Evolute... ad infinitum? with Like.
So here I have an interesting classical DG research question. I also think that in the general case it doesn't converge to a finite...
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FactChecker reacted to Ibix's post in the thread High School I don't understand the Michelson–Morley experiment with Like.
Light was, at the time, believed to be a wave travelling in a medium called the ether. Its speed would always be ##c## relative to the...
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FactChecker reacted to Ibix's post in the thread High School Einstein equations don't work at large scale? with Like.
Back in 1780, it was discovered that Newtonian gravity did not correctly predict the positions of the outer planets. Herschel proposed a...
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FactChecker reacted to Dale's post in the thread High School Einstein equations don't work at large scale? with Like.
This source does not meet the PF standards. So we can certainly discuss your questions, but we will not be relying on or discussing the...
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FactChecker replied to the thread Undergrad Transit time for a round trip to Alpha Centuri....After thinking more about it, my "two cents" may not have been worth that much. I will not comment further.
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FactChecker reacted to DaveC426913's post in the thread Undergrad Transit time for a round trip to Alpha Centuri... with Like.
Yes. I was oversimplifying. One could more accurately argue that, at the midpoint, A.centauri is only 1.75ly away, which is why the...