Dale's latest activity
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Dale reacted to Hornbein's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with
Like.
There are many words that do not have a definition on which everyone agrees. I don't worry about it. I just state the definition I'm... -
Dale replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.It isn’t an error for a person to find a valid solution to a problem. It isn’t an error for a different person to find a different valid...
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Dale replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.That sounds very interesting. Do you have a reference handy for that?
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Dale replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.It isn’t a convergence problem. None of the integrals or limits involved diverge.
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Dale reacted to DavidMartin's post in the thread Graduate Can a causal or time-like structure emerge without assuming a metric? with Like.
Could we come back to the sens of my question and ignore the emerging remaining ? :smile: Let me restate the core question more...
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Dale reacted to Hornbein's post in the thread High School Rotating disc: tidal relativity across surface of disc with Like.
The surface of a spinning neutron star can reach 10% of the speed of light. At this point the star "tries" to morph into a torus. It...
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Dale reacted to PeroK's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
There are underlying concepts in physics and mathematics that have to be understood in themselves. Words are the labels we give them so...
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Dale reacted to javisot's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
It's incredible how often this happens, ending up discussing language instead of physics.
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Dale reacted to Ibix's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
Somebody already posted the standard model particle list upthread. Ignore photons (the electromagnetic field), gluons (the strong...
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Dale replied to the thread High School Is there anything in the Universe that is not fundamentally made up of matter?.The reason there is not a defined concept for this is because there is no measurement that depends on it. There is no “matter-ometer”...
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Dale reacted to PeterDonis's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
There isn't one. That isn't a concept that plays any role in our actual physical theories. There is? What kind of disagreement...
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Dale reacted to Hill's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
Spacetime is not fundamentally made up by matter.
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Dale reacted to Hill's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
Spacetime is not fundamentally made up of matter.
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Dale reacted to PeterDonis's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
Found it: https://www.physicsforums.com/threads/how-can-a-principle-produce-a-force.1052769/post-6918504 The paper is by Dyson &...
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Dale reacted to PeterDonis's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
Because they're using different definitions of ordinary language words. That's why we don't do physics using ordinary language. We do it...