Israel Definition and 9 Threads
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Undergrad Israel Junction Conditions: Finding Continuous Metric Across Shell
A Relativist's Toolkit (2004) lists the Israel junction conditions as: ##1. [h_{ab}]## ##2. S_{ab}=[K_{ab}]-[K]h_{ab}## Where ##S_{ab}## is the stress-energy tensor of the shell only, and ##[K_{ab}]## and ##[K]## are ##K_{ab}^--K_{ab}^+## and ##K^--K^+## respectively. My understanding is that...- Onyx
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- General relativity Israel Junction
- Replies: 20
- Forum: Special and General Relativity
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Stargazing Huge daytime fireball over Israel earlier today
Huge daytime fireball over Israel earlier today. (15 Apr 2023) https://www.timesofisrael.com/unusually-bright-meteor-seen-over-israel-as-some-report-hearing-blast/?fbclid=IwAR2mXZmlknAC821IB2syvsdEFt-mTwjUaJri4rDyVJWE3erCPYNK6B_1jW0I have at least one meteorite hunter/collector packing his...- davenn
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- Israel
- Replies: 3
- Forum: Astronomy and Astrophysics
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COVID Israel: 86% Increase in Effectiveness with 3rd Pfizer Dose
Data has come in from Isreal about the effectiveness of a third dose: https://www.straitstimes.com/world/middle-east/third-pfizer-dose-86-effective-in-over-60s-says-israel-healthcare-provider Remember this is 86% better than those that have already had two doses. I will leave it to others to...- bhobba
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- Data Israel
- Replies: 4
- Forum: Biology and Medical
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Graduate Israel junction conditions for simple metrics
Hello, I am curious as to how one appropriately matches an interior and exterior solution in GR, i.e. where the interior corresponds to the field of some finite spherical mass (perfect fluid sphere, for the Schwarzschild interior solution). Specifically, looking at both the Schwarzschild...- FunkyDwarf
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- Conditions Israel Junction
- Replies: 4
- Forum: Special and General Relativity
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Help in choosing Israeli academic institute
In the next semester (October 2016) I want to start learning physics with preferation for learning in a program that including two subjects- physics and math for the 1st degree. My will it`s to advance to theoretical research and to get a Doctor degree, even co-operate with international...- DaniV
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- Academic Israel Universities
- Replies: 5
- Forum: STEM Academic Advising
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Graduate Israel Wilson Perjes Metric: Tetrad Formalism Reference
Is there any book or reference perhaps on string theory or superstring theory or even advanced general relativity that treats the Israel Wilson Perjes metric using the tetrad formalism in details, i.e, 1-forms and so? (Not spinors methos) I have ran across many papers that just place the spin...- PhyAmateur
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- General relativity Israel Metric
- Replies: 5
- Forum: Special and General Relativity
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Graduate What Are Tension Shells and Tension Stars in Israel Formalism?
I've been learning the Israel formalism (see original article here) for thin shells. I think I understand the formalism well and how to do the matching given two manifolds (that are solutions of the Einstein's field equations - EFE). I've been studying several articles that use the matching...- PLuz
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- General relativity Israel Spacetime Stars Tension
- Replies: 15
- Forum: Special and General Relativity
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From Israel: what are these recently added transformer discs?
This woman in Israel is spooked by the clear, brown and green discs just added to transformers in her Israeli townas seen in this clip http://img128.imagevenue.com/img.php?image=82134_ScreenHunter_02Feb.0403.03_122_415lo.jpg She writes: "What are The new installations on the Pylons...- mifletz
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- Israel Transformer
- Replies: 13
- Forum: Electrical Engineering
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Artificial rain cloud machine created by Israel scientists
!Artificial rain cloud machine created by Israel scientists! Yesterday, while seeing spanish news, I was seeing are report of Israel scientists created a machine that produces artificial clouds with rain!The machine is a clear tube with an apparatus at the bottom and closed at the top...- Solrojo
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- Cloud Israel Machine Rain
- Replies: 8
- Forum: Quantum Physics