Nugatory's latest activity
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Nugatory replied to the thread Undergrad Nested universes across scales - existing literature?.No. Your speculative idea neither explains some previously observed but unexplained phenomenon nor suggests some experiment/observation... -
Dear Robert, My condolences to you and your family. He was a great contributor to the PF community. We will miss him. I will miss his...
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Nugatory replied to the thread Paul Hinds has passed.Very sorry to hear this - he contributed much over the years and will be missed.
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Nugatory reacted to JimWhoKnew's post in the thread Graduate Kruskal Coordinates in Schwartzchild metric with
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Of course they are not. That's how you can get the factors right. Hint: use ##~e^{\ln{x}}=x~## in the equation in #7. -
Nugatory reacted to JimWhoKnew's post in the thread Graduate Kruskal Coordinates in Schwartzchild metric with Like.
I lost track. Can you see that after the correction, you have$$\frac{2M}r e^{-r/2M}d\bar{u}d\bar{v}=\frac{2M}r...
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Nugatory reacted to JimWhoKnew's post in the thread Graduate Kruskal Coordinates in Schwartzchild metric with Like.
Shouldn't it be ##dr^*=dr+dr/(r/2M-1)=dr/(1-2M/r)## ? I didn't read beyond that. I'll do, if necessary, after your reply.
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Nugatory reacted to JimWhoKnew's post in the thread Undergrad The imaginary part of the wave function with Like.
Introductory textbooks usually deal a lot with time-independent Hamiltonians of the form$$H=\frac{\mathbf{P}^2}{2 m}+V(\mathbf{x})\quad...
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Nugatory replied to the thread Undergrad EPR revisited.Do remember that collapse is not part of the theory of quantum mechanics as described by the math (which is the only real description of...
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Nugatory reacted to JimWhoKnew's post in the thread Undergrad Klein-Gordon equation in the nonrelativistic limit with Like.
From relativity, having the rest mass as the limit of the energy when the kinetic contribution goes to zero, is a welcome feature...
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Nugatory replied to the thread High School Thought Experiment on Charge Carriers and Electrical Conduction.Your hypothetical “electrop”differs from the positron (the electron’s anti-particle, and not hypothetical) only in that it doesn’t...
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Nugatory reacted to timmdeeg's post in the thread Undergrad One does not “prove” the basic principles of Quantum Mechanics with Like.
Sorry for a layman question in between. As I understood it a quantum object has no well defined properties unless it interacts. Isn't...
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Nugatory reacted to Sambuco's post in the thread Undergrad One does not “prove” the basic principles of Quantum Mechanics with Like.
I would like to add that the idea that a quantum object exists at all times and possesses objective properties is nothing more than a...
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Nugatory replied to the thread Undergrad Reference frames, center of rotation, etc.We aren't. We are analyzing the forces acting on a given infinitesimal volume somewhere along the rod, and these are all external to...
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Nugatory reacted to Herman Trivilino's post in the thread Undergrad Is energy really conserved? with Like.
No. One of the great unifications in physics was the discovery that there is an equivalence between mechanical and thermal energy...
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Nugatory replied to the thread High School The M paradox.Any time you run into a paradox, your first thought should be that you have taken a wrong turn on the way there. You have started from...