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Quality answers to common physics questions
Aug12-14 11:12 PM Simon Bridge 
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All physics courses. PDFs, tutorials and web links.
Y 09:17 PM Draizen 
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Jan16-12 Greg Bernhardt
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Sep5-14 05:07 PM
DennisN
170 192,313
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 71,214
hello, I'm currently working on a computer graphics project where I render realistic ice cubes in realtime. Since...
Feb13-06 07:05 AM
Sepultang
0 2,374
Am I right in thinking that conformally flat coordinates for a sphere are found by projecting it onto the equatorial...
Feb13-06 06:31 AM
Charles Francis
0 1,029
ABS brakes and regular ones....as in physics way..i understand that they aviod skids by not locking...but what is the...
Feb13-06 03:03 AM
KKK
3 1,763
This question could have been posted in qm or gsr but since it is so versitile i'll post it here. Is there a...
Feb13-06 01:59 AM
rbj
6 1,985
For phase transitions, symmetry is spontaneously broken. According to Landau, the order parameter acquires a non-zero...
Feb12-06 06:00 AM
Max
2 2,838
Can anyone help me find information on the percolation threshold, i.e for when particle concentration is increased to...
Feb12-06 01:42 AM
somy
1 1,423
How do Newton's third law, mass, acceleration, impulse, inelastic and elastic collisions, momentum, conservation of...
Feb11-06 02:45 PM
Mattara
8 2,320
Do scientists have the means to directly make photons into some material ?
Feb11-06 02:41 PM
GOD__AM
7 1,193
here's one for the physics buffs... at the first stage of the perception of light, a photon(s) bleaches/is absorbed...
Feb11-06 11:20 AM
chewan
8 1,427
Hi do u know if we increase the n in an optical fiber why the optical distance becomes bigger? Now only this but...
Feb11-06 09:59 AM
jtbell
3 1,275
Jon Bell wrote: > The electron has a momentum probability distribution > which can be calculated by taking the...
Feb11-06 06:00 AM
Mike Fontenot
0 1,166
> There are no indefinite Hilbert spaces. If you mean an indefinite inner > product space, there is no natural...
Feb11-06 06:00 AM
Arnold Neumaier
1 1,281
With the (oft-quoted) tremendous success of Quantum Mechanics (QM) predicting all types of phenomena, is there still...
Feb10-06 06:30 AM
Hendrik van Hees
18 2,625
Some of you may find my website interesting, I have a collection of links to various physics papers of historical...
Feb10-06 06:30 AM
Allan Murray
0 1,381
I want to upload my paper to the arXiv into General Physics. My paper is: ...
Feb10-06 06:30 AM
Mike Helland
0 2,044
Hello, Should we expect from theoretical considerations that the phase of the wavefunction could "slow down" in a...
Feb10-06 06:00 AM
Igor Khavkine
2 935
Any idea where can i get some example of good lab report writing? And what other resource and material should i get to...
Feb10-06 04:48 AM
darkar
3 6,102
e-mail announcements from the APS Zz.
Feb10-06 04:39 AM
ZapperZ
0 1,878
A gravity graph is a kind of art "tool" that lets you draw nice geometric shapes. It has a board the size of a piece...
Feb10-06 02:08 AM
daniel_i_l
0 5,673
Is it true that mass and energy are interchangable? If mass were to be defined as "the force of matter", is it then...
Feb10-06 12:14 AM
pervect
4 1,456
I love physics. But I have a major problem with it. I hate how there are so many theoreis. There is something about...
Feb9-06 05:17 PM
AzMaphysics
9 1,892
Does it something to do with photons emitted by electrons when going down orbits around the atom? And why it glows...
Feb9-06 12:14 PM
Tide
5 1,464
Can an invisible person see? Please explain for me. Thanks
Feb9-06 06:49 AM
DrGreg
6 1,508
Happy New Year to you all. I have been reading the S.P.String group and there is much written on a observation of...
Feb9-06 06:00 AM
Igor Khavkine
1 871
It is believed that neutrinos have finite mass, albeit much smaller than all the other leptons and quarks. Because of...
Feb9-06 06:00 AM
ebunn@lfa221051.richmond.edu
3 1,669
What does light consist of? The super string theory state light is a vibration of the higher dimensions. Is light...
Feb8-06 07:04 PM
Agent C.I
4 1,250
Ok, ive been arguing for a while about this, its probably easy for you to answer, but I need to know which is true and...
Feb8-06 02:00 PM
vaishakh
3 1,010
The answer is NO. Gravity can be view as a gauge field. The logic of gauge theory is to promote a global gauge...
Feb8-06 06:00 AM
Max
0 1,687
Hello, I have found an argument based on Newtonian physics proving that spacetime must be curved. Consider two...
Feb8-06 06:00 AM
Joe Fischer
6 1,261
According to the Einstein-Cartan theory, there is torsion in addition to curvature in the metric. There is an...
Feb8-06 06:00 AM
Max
0 1,148
http://tinyurl.com/a74ou Can someone please explain a bit more rigorously what exactly is going on with black...
Feb8-06 06:00 AM
Norm Dresner
2 1,722
thomas_larsson_01@hotmail.com wrote: >Consider for definiteness Yang-Mills theory, whose gauge algebra >is...
Feb8-06 06:00 AM
thomas_larsson_01@hotmail.com
1 1,685
Hi, I need to know about lasers. Has anyone got any websites or links describing lasers?
Feb7-06 12:58 PM
dilan
6 1,428
A question I was wnodering, The algebra of complex scalar superfields, is commutative, isn't it? I mean, then you...
Feb7-06 06:00 AM
arivero@unizar.es
0 1,007
Recently I thought of an analogy that I thought might be useful for visualizing how energy and mass are equivalent,...
Feb6-06 06:30 PM
Chaos' lil bro Order
0 1,780
When you calculate the two moments for the law of the levers, they are supposed to be the same, right?
Feb6-06 11:51 AM
HallsofIvy
1 8,063
Let's say that something is spinning and it spins in a certian direction. The object has rotational inertia. Now say...
Feb6-06 09:03 AM
DavidK
5 1,732
http://www.gi.alaska.edu/ScienceForum/ASF4/422.html
Feb6-06 04:58 AM
Ivan Seeking
2 1,182
Some times it becomes very difficult to differenciate between Circular motion and Rotational motion.Can any one tell...
Feb5-06 11:25 AM
vaishakh
2 4,246
For a school project, I am trying to compile a good sized list of the interelation of derivatives in physics. I know I...
Feb5-06 10:11 AM
vanesch
1 8,877

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