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Jul24-14 11:39 AM Greg Bernhardt 
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 69,185
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
168 185,097
Last year in physics, i noticed that the formula for kinetic energy is ( E=1/2mv^2 ) looks an awful lot like the...
Jul13-07 11:52 AM
LHarriger
11 1,205
My physics textbook talks about them like they are two different things. Can someone explain further? Thanks for...
Jul13-07 12:45 PM
belliott4488
3 6,523
When and electron loses energy it drops in orbit of the neucleous, but does it pick up veolocity? In this lecture at...
Jul13-07 07:03 PM
olgranpappy
12 1,854
I am currently having some difficulty in recalling/understanding the potential difference across parallel circuits....
Jul13-07 11:51 PM
truewt
36 30,548
I have a ruler which is connected to a spring that causes the ruler to move in a circular motion around the spring....
Jul14-07 12:59 AM
Ry122
2 822
hello all i started to read recently about blackhole production and decay rates at LHC to know more about it i...
Jul14-07 05:00 AM
dalimoh@gmail.com
0 1,637
Hi. I am working through Schutz's Geometrical Methods of Mathematical Physics. In the section on Hamiltonian...
Jul14-07 05:00 AM
AGS
0 1,418
On Jul 6, 3:41 am, Gerry Quinn <ger...@indigo.ie> wrote: > In article...
Jul14-07 05:00 AM
Gerard Westendorp
9 763
During 1915 through 1917 Einstein published two or three papers introducing the idea of downward stimulated...
Jul14-07 05:00 AM
AES
2 7,023
Hi, I am just learning GR (a gap in my physics education). I have a few elementary questions: 1. Does the Feynman...
Jul14-07 05:00 AM
iuval
18 1,450
A month ago I have started a thread called Maxwell versus Compton. Unfortunately I didn't have time to join the...
Jul14-07 05:00 AM
kvblake
0 946
Hi, I'm looking for course, lecture notes, ppt, pdf about magnetic reconnection. Maybe somebody here's got...
Jul14-07 12:31 PM
jtbell
1 1,010
Matter is anything that has mass and occupy space. Yet what is mass? Mass is the quantity of matter. This is a...
Jul14-07 05:44 PM
ZapperZ
12 2,101
Hi: EASER = Electricity Amplification by the Stimulated Emission of Radiation MAASER = MAgnetism Amplification...
Jul15-07 05:00 AM
AES
3 779
when performing a double slit experiment using photons it is said that if you fire individual photons that over time...
Jul16-07 10:17 AM
ZapperZ
5 1,213
Hi Im trying to find the elastic potential energy stored in a mousetrap spring. I plan on doing this by graphing the...
Jul16-07 02:50 PM
olgranpappy
5 3,340
Hi, I have an interest (for simple game physics) in basic equations like the trajectory of a projectile and...
Jul16-07 03:02 PM
olgranpappy
3 939
Hi, when someone gives me an angular frequency in units of inverse length (i.e., 520.5 cm^-1) how do I convert that to...
Jul17-07 03:09 AM
xez
2 17,809
In article <4696ac98$0$331$e4fe514c@news.xs4all.nl>, Gerard Westendorp <westy31@xs4all.nl> wrote: > In general, if...
Jul17-07 05:00 AM
Gerard Westendorp
1 774
Dear all, If I have a strong magnetic field present (an oscillating field at say 60Hz), how can I eliminate its...
Jul17-07 06:31 AM
xez
1 1,740
I was recently watching an episode of The View on youtube where they were talking about 9/11 conspiracys. Rosie (I...
Jul17-07 11:25 AM
russ_watters
4 29,804
Hi, I'm trying to program a little 2D game to test some physics out. What I want is a ground formed from a set...
Jul17-07 09:23 PM
Claude Bile
7 1,464
Starting some sixty years ago Toraldo di Francia wrote several papers on what he called "parageometrical optics" as...
Jul18-07 05:00 AM
rge11x
0 839
To whom it might concern: I've made my thesis on bound-free pair production by photon impact available in PDF format:...
Jul18-07 05:00 AM
Carsten Agger
0 962
Hello, I've just understood enough of basic gauge theory that I almost understand EM arising as a gauge theory....
Jul18-07 05:00 AM
markwh04@yahoo.com
2 1,045
I have a basic question about plano-convex lenses. suppose that I want to collimate the bean angle produced by a led...
Jul18-07 11:44 AM
mgb_phys
4 14,227
Any barrier passes more low frequencies than high (i.e. the amplitude of transmitted wave is higher when the frequency...
Jul18-07 01:24 PM
berkeman
4 1,842
Okay, I'm sort of confused about forces and acceleration here. Does any force cause an acceleration? What if the force...
Jul18-07 04:08 PM
alvaros
10 2,907
Hey everyone. I'm taking physics 2 right now in the summer and my professor keeps saying you can get free electricity,...
Jul18-07 06:06 PM
berkeman
8 2,120
if gravitation is present, will there be a capillary rise of liquid in vaccume?
Jul19-07 03:24 AM
abhijitlohiya
4 3,696
Well, I am currently having a discussion about leading shots with warships. One person thinks that a shell fired from...
Jul19-07 11:57 AM
russ_watters
2 1,452
Here is a question, which may seem dumb: Consider an electron and a positron that annihilate, both of which are...
Jul19-07 02:07 PM
affinefield
18 2,728
Hi, It is generally not my style to ask for this type of help... But I am now summarizing my PhD thesis, and I feel...
Jul19-07 08:54 PM
Claude Bile
1 1,103
So I have two (somewhat) related questions. 1) Why is it wheel rims (or spokes) sometimes appear to spin backward?...
Jul20-07 12:32 AM
Danger
18 3,142
I am wondering about the extent to which the generation of gravitational waves is dependent upon the assumption that...
Jul20-07 05:01 AM
rlolders...@amherst.edu
0 971
I've been taking part in a long thread on the online Physics Forums regarding a relativistic treatment of a spinning...
Jul20-07 05:02 AM
Darwin
9 889
(A part of) My paper "GR-friendly description of quantum systems" (IJTP, DOI 10.1007/s10773-007-9474-3,...
Jul20-07 05:03 AM
V. Trifonov
0 608
We had a experiment on a metal ball dropped on a Falling sphere viscometer containing a certain liquid(I forgot what...
Jul20-07 06:42 AM
FredGarvin
1 7,545
Hey guys, I'm currently having some trouble regarding the water pipe systems. The problem arose as I was exploring...
Jul20-07 11:18 AM
Q_Goest
11 8,019
Here's the problem: 2 Battleships are travelling at the same speed and at the same direction. They both have the...
Jul20-07 05:23 PM
PleaseHelpMe
14 1,822

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