bhobba's latest activity
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bhobba reacted to PeterDonis's post in the thread I Missing proof of the Shell theorem in General Relativity with
Like.
Sorry, but this isn't a responsive answer. You need to cite a specific chapter/section/page in a specific textbook or peer-reviewed... -
bhobba reacted to PeterDonis's post in the thread I Missing proof of the Shell theorem in General Relativity with Like.
Perhaps it can in Newtonian physics. That doesn't mean it can in GR. Not in GR, you don't. Long before you get to that point, you will...
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bhobba reacted to Bosko's post in the thread I Missing proof of the Shell theorem in General Relativity with Like.
The first part can be derived from the second part . E.g. The array of shells with the same mass and with 1/n radius . By subtracting...
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bhobba reacted to weirdoguy's post in the thread I Missing proof of the Shell theorem in General Relativity with Like.
Where did you get that it is? What are your sources?
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bhobba reacted to PeterDonis's post in the thread I Missing proof of the Shell theorem in General Relativity with Like.
The second part of the shell theorem holds in GR, in the form that the sptacetime geometry of a vacuum region inside a spherically...
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bhobba reacted to PeterDonis's post in the thread I Missing proof of the Shell theorem in General Relativity with Like.
No, it isn't. That's not how the Schwarzschild solution is derived.
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bhobba reacted to PeterDonis's post in the thread A Question on Dirac's derivatives of the 4-velocity w.r.t. coordinates with Like.
Yes, because again, the vectors in question are functions of only one variable. Only if ##t## is a curve parameter instead of a single...
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bhobba reacted to PeterDonis's post in the thread A Question on Dirac's derivatives of the 4-velocity w.r.t. coordinates with Like.
But that's because ##x## and ##v## in your example are only functions of one variable, ##t##. In the case under discussion here, we...
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I once installed Microsoft's Outlook Server and was surprised by the fact that it simply allocated all the RAM (and possibly took over...
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These days, the cost of a fast Gen 4 SSD is cheap: about $38 for a Gen 4 NVME drive. This is why many new laptops have at least that...
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bhobba reacted to sbrothy's post in the thread Python Question about learning programming with Like.
Oh! Sorry. Yeah, obvious language eff-up! I know that calling someone a "tool" is an insult, but due to my non-native language it...
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bhobba replied to the thread Python Question about learning programming.I think he meant to be anything but a tool user, so, as a mentor, I took no action; to me, it was rather obvious. But I would ask the OP...
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bhobba reacted to symbolipoint's post in the thread Python Question about learning programming with Like.
Posts #32, #33. I tried to learn Python on my own many years ago and made NO progress. I have been only ever able to handle two...
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bhobba replied to the thread Python Question about learning programming.Been programming nearly all my life, and I am now 70. I did it professionally for over 30 years. Python is the best language to learn...
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bhobba reacted to PeterDonis's post in the thread Python Question about learning programming with Like.
Python is often said to be "executable pseudocode". It doesn't 100% achieve that goal, no programming language can, but the idea behind...