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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...
May6-14 04:32 AM
Cthugha
168 190,600
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 70,543
'Hyperdimensional physics' ? If this is against the rules then i ask for a mod to please close this thread. Thank you...
Dec12-05 01:41 PM
vincentm
3 1,229
If photons are emitted or absorbed when a pair or a collection of particles, that are or behave as dipoles, undergo...
Dec12-05 12:52 PM
Meir Achuz
2 1,543
This is something I have been doubting about for a rather long time, but now I want to try and ask other people to...
Dec12-05 09:30 AM
robphy
22 1,703
I'm doing a presentation on the physical properties of quartz for my Physics a-level and mostly on its piezoelectric...
Dec11-05 07:23 PM
FredGarvin
2 3,053
From my understanding, uncertainty theory only says that we would be unable to measure the position and momentum of a...
Dec11-05 03:23 PM
Ratzinger
4 1,905
Just curious: Is there a way to calculate flame height given the material being burnt and the area of flame output...
Dec11-05 02:28 PM
Danger
4 3,816
(I'm not too good with history so correct me if I'm wrong.) pre-gallileo this is what people generally assumed....
Dec11-05 10:31 AM
sigh hens
2 18,991
Just wondering what everyones view on the properties of Light is. I'm new to these forums, so I don't know if it has...
Dec11-05 08:46 AM
nazgjunk
29 4,399
I was just curios to know how many physicists out there personally own a laser. If you own a laser, what do you do...
Dec11-05 05:02 AM
Jonny_trigonometry
16 2,233
I'm no physicist but this really doesn't make sense to me. Simple newtonian physics says that gravity is...
Dec10-05 10:42 PM
Tide
8 6,053
how can this be explained?
Dec10-05 10:03 AM
Danger
1 1,864
Iím currently involved in a debate with a few folks regarding the validity of the Conservation of Momentum principle....
Dec10-05 08:58 AM
pmb_phy
37 8,754
I have come accross this question in another forum and thought to post it here, hopefully will get some interesting...
Dec9-05 04:26 PM
leka
20 2,512
Hey, We recently started learning about magnetic fields and forces in physics and we took these weird right hand...
Dec9-05 02:44 PM
Doc Al
2 4,683
Since time is variable, how do you measure its velocity and acceleration? seconds per ?
Dec9-05 02:24 PM
pervect
15 1,280
similar to the koch snowflake, could the universe be a fractal hyper-polyhedron so its volume approaches infinity,...
Dec9-05 11:31 AM
ComputerGeek
0 1,613
The AIP's Physics News Update selected the Quark-Gluon "liquid" discovered at Brookhaven's RHIC as the top story of...
Dec9-05 10:38 AM
ZapperZ
0 1,313
If I move a strip of copper mechanically with my hand through a uniform magnetic field will their be a drift velocity?...
Dec9-05 03:59 AM
erickalle
2 3,673
Hi, I have a question about a basic principle of physics: the laws of motion. If two identical buses were...
Dec9-05 01:14 AM
jhe1984
6 1,190
In the Vol. I, 27-7 of Feynman's Lectures on Physics, he derives a formula for the resolving power of an optical...
Dec8-05 07:19 PM
gainwmn
0 1,004
How widely accepted is the holographic model in physics? Does the concept of "each part containg the whole" appeal to...
Dec8-05 03:45 PM
RAD4921
0 1,260
is it possible that the big bang was caused by an electro-magnetic explosion thus explaining the behavior of atoms?
Dec8-05 03:07 PM
GLENN
0 1,380
I don't know how to elaborate on this question any more, and I don't even know if it can be answered... BUT. Does...
Dec8-05 02:17 PM
Danger
1 711
I am constructing a hologram device for a school project. The hologram will be made with a HeNe laser, but what can I...
Dec7-05 03:26 PM
z-component
2 1,557
I don't know if this was already adressed, but I saw in my book the term of Non-existent force and until today I...
Dec7-05 03:10 PM
Fermat
1 2,148
hello all... i need u're help, well, i want to build a magnetic box - now, i have 4 hollow objects 2cm on 2 cm, ...
Dec7-05 01:27 PM
limio
3 1,369
Hey guys, I was reading on another forum when someone posted the following: I have no idea what to make of...
Dec7-05 08:25 AM
Doc Al
12 1,202
I have seen an article about the earth flying away from the sun due to the use of nuclear energy: the earth becomes...
Dec7-05 01:44 AM
TiBaal89
19 2,080
I have learnt just about the right hand rule in vector cross product. How is this proved? Can anybody give an example...
Dec6-05 02:41 PM
NateTG
7 4,614
My question is quite simple: It is common knowledge that most metals make a lot of noise when in contact with...
Dec6-05 11:24 AM
Bystander
7 4,399
It's common practice in radiography, especially medical radiography where radiation doses are relevant, to use a...
Dec6-05 08:32 AM
imabug
3 5,143
It is possible for the magnetic field to do work? I know it cannot do work on a moving charge, but what about.....a...
Dec5-05 12:41 PM
dicerandom
5 2,092
Why is the GM tube polarised? What benefit comes from having the anode at the centre of the tube? What happens if...
Dec5-05 12:34 PM
ChumpusRex
2 8,496
This is space to start writing up and discussing ideas, structure and content for a possible Physics Homework FAQ type...
Dec5-05 10:13 AM
drpizza
35 7,024
Person A: Falling from the top of a 20' ladder. Or Person B: Falling with a 20' ladder that is falling over....
Dec5-05 10:09 AM
BobG
26 3,240
I don't understand this idea. My terxtbook says that Fermat's principle is that light travels by the path that takes...
Dec4-05 10:21 PM
robphy
8 2,160
Hello, why does light incident on a material heat up the material? :redface:
Dec4-05 04:09 PM
Danger
12 1,458
Hello, I have very interesting physic problem. But i really have no idea how to solve it... Maybe somebody can give me...
Dec4-05 03:20 PM
Marek
2 3,359
An object with positive inertia resists acceleration. An inertialess object would not resist acceleration at all. What...
Dec4-05 12:58 PM
Sir_Deenicus
2 7,107
Hi Group I have a question about x-ray spectra. If we look at a spectrum from a typical x-ray tube with a...
Dec4-05 09:12 AM
ChumpusRex
3 2,871

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