DanteKennedy's latest activity
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DDanteKennedy reacted to Dale's post in the thread High School The problem of energy appearing out of nowhere with
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That is the opposite of what I said above. The discussion that others were having is whether or not the FLRW spacetime is a counter... -
DDanteKennedy reacted to PeterDonis's post in the thread High School The problem of energy appearing out of nowhere with Like.
Actually, "conventional physics" does have a concept something like what you describe--indeed, that's how the concept of a "field" arose...
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DDanteKennedy replied to the thread High School The problem of energy appearing out of nowhere.How about the idea that the universe could give an illusion of energy appearing or disappearing out of nowhere by having extra invisible...
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DDanteKennedy reacted to PeterDonis's post in the thread High School The problem of energy appearing out of nowhere with Like.
That's correct. It's a consequence of the Einstein Field Equation, plus including all forms of local stress-energy in your model. In a...
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DDanteKennedy reacted to PeterDonis's post in the thread High School The problem of energy appearing out of nowhere with Like.
In order to even try to answer what happens in such a scenario, you have to have some set of physical laws that you're going to apply...
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DDanteKennedy replied to the thread High School The problem of energy appearing out of nowhere.So according to current understanding in physics, we cannot have any type of universe that obeys relativity while not holding...
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DDanteKennedy reacted to Matterwave's post in the thread High School The problem of energy appearing out of nowhere with Like.
Maybe to the OP I can make the following (I believe) fully non-controversial statement: GR "obeys relativity" and yet admits solutions...
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DDanteKennedy reacted to PeroK's post in the thread High School The problem of energy appearing out of nowhere with Like.
You may want to ask yourself the following questions: Can a quantity be conserved but not invariant? Can a quantity be invariant but...
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DDanteKennedy posted the thread High School The problem of energy appearing out of nowhere in Special and General Relativity.To help with the idea, imagine a box sits in lab in frame S. At some moment, it somehow spontaneously creates 10 J of energy from...
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DDanteKennedy reacted to bhobba's post in the thread Need study guidance/roadmap for Quantum Physics with Like.
I like If you want to go further than Ballentine: https://www.amazon.com.au/QUANTUM-MECHANICS-2ND-ED-DEVELOPMENT/dp/9814578576 If...
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DYou can find the pdf online, e.g. https://webhomes.maths.ed.ac.uk/~v1ranick/papers/niven.pdf
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DAccording to Wiki, the case against rational tangent of rational angle in degrees is provided in Nivens "Irrational Numbers" - a book...
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DI think you can finish it off by looking at the imaginary part and using the rational root theorem. This would show that either ##a =...
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DHere's my thinking. We need an angle ##\theta = q\pi## (in radians), where ##q## and both ##\cos \theta## and ##\sin \theta## are...
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DDanteKennedy replied to the thread "Critical" Triangle Problem.Thanks, so it seems like no such triangle exist