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May25-09 10:31 AM ZapperZ 

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General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 63,634
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Apr8-14 10:13 AM
ZapperZ
166 160,213
My daughter has a sadistic physics instructor who just LOVES to see kids fail. He assigned the following problem to...
Feb9-04 02:11 AM
Jwprox
14 2,397
okay, i was just reading about another theory of light on theory development when i got a eureka! you know that light...
Feb9-04 05:09 PM
paglren
4 1,109
How does lightning occur ? Please give a brief answer:smile: Thanks in advance :smile:
May21-09 02:15 PM
x3qt0r
3 846
I don't know much about what I am about to ask on this forum (isn't it what this is all about?!)... My question is...
Mar18-04 01:17 PM
SAZAR
15 5,879
Yesterday I was watching Spanish news announcing that Israel scientists have invented a machine that produces...
Jan30-04 06:59 PM
LURCH
5 3,209
Hi, I've got a question about fitting a known function to a measured data. Suppose I want to find X parameters...
Nov21-11 07:37 PM
gsal
1 886
http://members.aol.com/crebigsol/awards.htm this may be old but did anyone win?
Aug19-03 11:33 PM
Brad_Ad23
4 2,292
Hello my university is giving out little "mini" grants for undergrad research and I was wanting to get involved...
Oct21-10 09:26 AM
Davide86
3 1,182
Hey guys, what's the difference between percent deviation and percent error?? I'm totally confused... how do I compare...
Sep20-11 04:27 PM
nmah
4 18,654
Hi if i have to find the percentage error of a volume measurement in a cylindrical column , how do i do it please? ...
Oct2-11 12:08 PM
Irishwolf
0 645
Well, I was reading about neutrino the other day, and I came across the Čerenkov radiation. I understand that the...
Jan11-09 01:04 AM
Hunterbender
2 1,487
I am starting a new thread on this subject because I feel that the subject under discussion is of the greatest...
Aug17-04 11:40 PM
McQueen
33 3,177
From Wikipedia: "Positron emission or beta plus decay (β+ decay) is a type of beta decay in which a proton is...
Jun28-11 11:55 AM
treehouse
4 1,712
I was checking the NIST site with their Hydrocarbon line database search utility, and the frequencies of the lines...
Jun29-09 04:10 AM
textbooks
0 948
"You can drop a mouse down a thousand-yard mine shaft and, on arriving at the bottom, it gets a slight shock and walks...
Mar11-12 09:40 AM
superalias
3 1,531
This is a bit of a contrived scenario, but I wonder how it might be solved.. Say you have two highly advanced...
Jul21-09 06:57 PM
maverick_starstrider
7 815
Is anyone aware of physical or mathematical reasons why "analog" memory is not possible? That is, a system that takes...
Mar1-14 06:07 PM
CWatters
14 483
I had a question about the anti-gravity globes, and used to wonder if they would still work if flipped upside down, I...
Sep4-09 05:26 PM
Learnphysics
11 2,324
I am interested in learning whether a particle’s status as "matter" or "antimatter" is an independent property of that...
Dec31-10 11:14 AM
Faradave
23 2,813
I don't understand, and I'm not kidding about that, TOO many people that are a hell of a lot smarter than me ponder...
Nov30-08 10:45 PM
ThomasT
34 4,973
hey can anyone help me with a a "ballistic bean bag blast" project i have to design? I have to desgin some kind of...
Apr11-08 06:03 PM
Davjohn
6 1,207
i'm used to mks unit systems, but i have to read a book with cgs recently. it's difficult for me to transform it...
Mar13-08 07:44 PM
Danger
8 1,664
While reading a textbook on introductory thermodynamics , I came across the following- "When a system is in...
Dec29-12 12:34 AM
springwave
8 940
What is meant by this phrase "coherence length" in reference to a magnetic field? What makes it "coherent"? I see...
Jul24-05 06:46 PM
brian0918
0 2,633
On Jul 30, 10:06pm, "Chris H. Fleming" <chris_h_flem...@yahoo.com> wrote: > On Jul 29, 12:21pm, Marc Nardmann...
Aug3-08 05:00 AM
Igor
14 1,395
"Combining high frequencies to get a large wavelength" Is this possible? There will be constructive and...
Jul1-08 02:01 PM
GTrax
8 2,132
Everytime i propose a new motion machine from my ignorance or misunderstunding of physics, your explanations solve...
May5-03 05:59 AM
cala
7 1,665
I've got several "Cryotiger" chillers that are in need of service, and it seems that the original manufacturer (IGC...
Jun29-07 05:05 AM
jasonwknight@gmail.com
0 2,986
http://www.sciencedaily.com/releases/2004/07/040702091545.htm
Jul3-04 01:22 AM
Ivan Seeking
0 1,895
Some objects emit electromagnetic radiation over the entire spectrum, from radio waves to X-rays. Solar flare loops,...
Jul20-03 12:39 PM
Tyger
4 3,014
My library just acquired a copy of "Differential Forms in Electromagnetics" by Ismo V. Lindell. This seems right up...
Mar10-06 04:00 AM
Bill J.
0 1,919
My library just acquired a copy of "Differential Forms in Electromagnetics" by Ismo V. Lindell. This seems right up...
Nov4-06 03:27 PM
Bill J.
0 2,202
Hey! This is my first post so sorry if I do anything against protocol. I need to design a sort of egg protection...
Apr11-11 07:33 AM
triangle man
6 7,993
Hi, I'm new to the forums and, to a large extent, to physics in general. Anyway, I've been interested in the...
May25-09 02:11 PM
WraithGlade
4 1,357
Hi, folks. First, I'd like to say that although I plan to major in physics next semester, I know very little of it...
Jun5-11 07:17 PM
atyy
28 2,456
In my Physics text book by Resnick, Halliday and Krane (Wiley publications), it is mentioned that (pg. 575), " the...
Jun4-06 04:17 AM
ssj5harsh
2 1,199
I saw a video of an experiment called "elephant toothpaste" on youtube, where a guy put hydrogen peroxide and...
Dec13-08 07:31 PM
mgb_phys
1 2,351
I was reading a book on quantum gravity the other day when I found myself having a lot of trouble grasping the idea of...
May13-08 05:12 PM
Nabeshin
2 2,322
Okay so I'm not scientific genius. Just got a question to ask. Lets propose that the big bang was correct - the only...
Nov19-09 12:57 PM
mgb_phys
14 1,524
My physics prof. gave us the following "extra credit" problems dealing with projectiles, but there are two different...
Jan1-04 04:14 PM
cow_gone_mad
1 870

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