DaveC426913's latest activity
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DaveC426913 replied to the thread Whatever happened to Evo?.Say hi to her the next time you hear from her? -
DaveC426913 replied to the thread Why Are You Still Here? A Curious Question.That, and its clear mission statement. Many fora don't have effective guardrails.
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DaveC426913 replied to the thread Undergrad Another Time Dilation Question.OK. I've stepped in a pile of it and mucked up the thread for readers. :sorry: Deferring to bigger brains.
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DaveC426913 reacted to PeterDonis's post in the thread Undergrad Another Time Dilation Question with
Informative.
Please read post #24 again. It explicitly uses the term "length contraction", and claims that this explains the shorter travel time by... -
DaveC426913 replied to the thread Programming Jokes: Lame, Science & Math Jokes!.I just made an eggcorn: I meant to say "The poster's confused ideas have all been dismantled" but it came out "The poster's confused...
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DaveC426913 replied to the thread Undergrad Another Time Dilation Question.He doesn't know anything about relativity or length contraction. He simply knows he is in a moving spaceship (because he was there when...
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DaveC426913 replied to the thread Undergrad Another Time Dilation Question.He is free to interpret what he sees. He does know he's in a spaceship, so he is perfectly with his rights to look out the window and...
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DaveC426913 replied to the thread Undergrad Another Time Dilation Question.Yes. This is often omitted in descriptions of relativistic trips from A to B. What twin A observes is that his destination is not so...
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DaveC426913 reacted to kochanskij's post in the thread I am writing a SciFi story but I don't like Rayguns with Informative.
An N dimensional manifold can be tied into a knot only in N+2 dimensional space. So a 2D surface, like a plane or surface of a sphere...
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DaveC426913 replied to the thread Programming Jokes: Lame, Science & Math Jokes!.
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DaveC426913 replied to the thread Collection of Lame Jokes.
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DaveC426913 replied to the thread I am writing a SciFi story but I don't like Rayguns.Sorry. Yes. I meant 2D.
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DaveC426913 replied to the thread Collection of Lame Jokes.Nowhere else to put this, Thought it was cute.
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DaveC426913 replied to the thread High School ASASSN-15lh (aka SN 2015L), a superluminal supernova, or hypernova?."No matter how bright you think a supernova is, it's brighter." - oft-quoted physicist's rule of thumb for estimating the power of a...
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DaveC426913 replied to the thread Today I Learned.Great. Just what we need - cancer cells discovering they produce something of value. Next thing, they'll want authorship rights on...
