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Exact value of Hydrogen line? by Jay Bala
A few simple questions: 1) Whats the exact value of Hydrogen line? 2) And under what condition(s) is this value holds true? Regards, Jay Bala.
(Multi-page thread 1 2 3)
1 Week Ago
by Richard Saam Go to last post
20 21
Does dark matter contribute to the mass of planets and stars? by johndevers@iprimus.com.au
If dark matter can't even escape the surface of the earth then why don't scientists include dark matter into their models and calculations of the mass of planets and...
(Multi-page thread 1 2 3)
29 30
Differential geometry in Gauge Fields, Knots and Gravity? by allegretti@uchicago.edu
This isn't exactly a research-level question, but it seems too technical for sci.math or sci.physics. I'm trying to learn differential geometry from a book by John Baez and...
1 Week Ago
by Rock Brentwood Go to last post
3 4
initial entropy by Dashen
Hi, I am reading in the introduction of hep-th/0208013: "the low entropy starting point is the ultimate reason that the universe has an arrow of time, without which the...
(Multi-page thread 1 2)
1 Week Ago
by Chris H. Fleming Go to last post
12 13
Questions about Adiabatic Quantum Computation by Vend
Hello, I'm trying to understand the difference between Adiabatic Quantum Computation and "traditional" Quantum Computation. I'm not a physicist, my background is in computer...
1 Week Ago
by BW Go to last post
1 2
What are the problems with defining a 'squared velocity tensor'? by ANS
Hello, When each component of the stress-Energy tensor is divided by a mass density, the result is a tensor object in which each component has the same units as velocity...
1 Week Ago
by ANS Go to last post
0 1
Galileo's Dialogues by zeynel
Hi Galieo's Dialogues on two world systems has just been translated and published in Turkish. I know this group has an international audience, can you tell me if and when...
1 Week Ago
by Chalky Go to last post
6 7
Vector parallel propagator on a CTC in GR by jacques
In Kerr spacetime there exists CTC's (t,r, theta constant and phi varying from 0 to 2pi) located in the negative space time (r 0). It is tempting to compute the holonomy of...
1 Week Ago
by jacques Go to last post
0 2
A Question About Weinberg's Electro-Weak Lagrangian by Igor
I recently dug out an old copy I had of Weinberg's original paper "A Theory of Leptons" from 1967 and began to look it over. One thing I'm a bit puzzled about is the claim...
1 Week Ago
by Rock Brentwood Go to last post
3 4
Query about Pionieer anomaly by JimJast
Does anybody know why it is called 'anomaly' if a drag resulting from the loss of kinetic energy of any moving object that travels along a straight line in in homogeneous...
(Multi-page thread 1 2)
2 Weeks Ago
by Craig Markwardt Go to last post
11 12
empirical evidence for gravitational field of EM radiation by ANS
Hello, Is there any empirical evidence that electromagnetic radiation produces gravitational fields? I understand that as a form of energy it is expected to induce a...
2 Weeks Ago
by ANS Go to last post
9 11
Point At Center Of The Earth Which Is Neutral In Gravity? by thhissux@aol.com
Like there is a neutral point of gravity some distance between the Earth and the Moon where both gravitational fields cancel each other out, would there be a point at the...
2 Weeks Ago
by Bruce Scott TOK Go to last post
8 9
Problems with the LHC? by Dirk Bruere
Ian Parker wrote: On 9 Sep, 02:45, Zach wrote: Are there legitimate cause for concern regarding CERN's Large Hadron Collider? I saw these two...
2 Weeks Ago
by Ian Parker Go to last post
1 3
Local expansion of the density matrix by uekstrom@gmail.com
I have a Kohn-Sham system with a one particle density matrix D(r1,r2) = sum_i r1|ii|r2, where the |i all are eigenfunctions to the Kohn-Sham Hamiltonian H (in other...
2 Weeks Ago
by uekstrom@gmail.com Go to last post
6 7
My paper on entangled states and EPR paradox by Benjamin Schulz
Hi group, I've written a paper on the EPR Paradox and I would like to hear, what you think of it. Its first sections of my paper are a review of less known articles by...
2 Weeks Ago
by Benjamin Schulz Go to last post
6 7
The Crookes Radiometer by John Baez
I may try to update the physics FAQ on the Crookes radiometer: http://math.ucr.edu/home/baez/physics/General/LightMill/light-mill.html It seems there's still a lot of...
(Multi-page thread 1 2 3)
3 Weeks Ago
by Richard Saam Go to last post
26 27
Problems with the LHC? by Zach
Are there legitimate cause for concern regarding CERN's Large Hadron Collider? I saw these two websites mentioned in the...
(Multi-page thread 1 2)
3 Weeks Ago
by Dirk Bruere at NeoPax Go to last post
15 16
Imperfections of classical thermodynamics by Jarek Duda
Here is simple counter example to 2nd law of thermodynamics - converting heat into work. Everything is in vacuum, without gravity: Take a tube with interior covered with...
(Multi-page thread 1 2)
3 Weeks Ago
by a student Go to last post
12 13
Dark matter questions by PStram
Why does dark matter form into a halo around non-dark matter? What prevents dark matter from forming into a nucleus surrounded by a non-dark matter halo? Can dark matter...
3 Weeks Ago
by johndevers@iprimus.com.au Go to last post
7 8
Does Quantum Theory Predict Optical Rogue Waves? by Shubee[_2_]
Researchers at the UCLA Henry Samueli School of Engineering and Applied Science have succeeded in creating and capturing optical rogue waves and have measured their...
3 Weeks Ago
by Uncle Al Go to last post
1 2
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