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Aug12-14 11:12 PM Simon Bridge 
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Aug31-14 02:46 PM nsaspook 
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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
168 190,879
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 70,642
I have a question about the simple machine: the wheel and axle. I know already that mechanical advantage through a...
Oct19-08 07:16 PM
Naty1
3 2,891
I was trying to figure out the motion of an axle in simple dry contact with the inner race of a wheel (see...
Jan31-10 09:56 PM
rs54
0 2,005
I know that the physics community generally hates this kind of question, though I don't know why. Like Richard Feynman...
Nov13-13 10:54 PM
BrainSalad
8 764
We have been doing a lot of work with wheatstone bridges in class lately and our teacher gave us a problem to try and...
May4-03 05:49 PM
sheldon
10 5,912
Imagine a glass sphere container. You took all the air inside so you have vacuum. Inside you have a very thin metal...
Mar15-11 10:13 AM
MNC007
10 1,714
Someone please tell me why if the photon has no charge or mass, it is modeled as having an E and B field component?......
Jun5-05 01:58 AM
Anomalous
9 2,789
my objective was that gravity caused movement in an object without lowering the center of mass i built a balance...
Dec21-05 06:27 PM
ZapperZ
4 1,484
The sound is generated not exclusively by fork on a plate, but from other things such as scratching your nails against...
Jul3-09 10:49 PM
Danger
10 5,074
Hello I would appreciate if someone can refresh my mind with the principle of superposition..
Sep18-12 11:31 AM
Khashishi
3 737
I don't understand the reasoning behind trying to discover anti-gravity. Attach a rocket to a load and make it...
Jan2-09 05:33 AM
HallsofIvy
1 1,022
i want to build a pendulum in resonace with a balance to see what happens so anybody knows whats the swinging...
Nov10-05 01:33 PM
Tide
1 803
Hello! Can someone explain the effect of gravity of an object on the same object? We pretty much know the effect...
Oct23-09 11:42 AM
Doc Al
16 1,768
from what i understand (and this could be flawed) is that group velocity is the velocity of the wave packets being...
Nov16-04 10:21 AM
Laser Jock
2 9,017
ok, im taking engineering physics II ... unfortunately, im forced to take this as part of my COMPUTER SCIENCE degree...
Oct22-03 04:32 PM
JaeSun
2 1,971
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 1,754
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 6,623
Ok, so i just finished my first semester ever of calculus. I have never ever made it this far in math in my life...
Jan9-13 07:52 AM
jedishrfu
9 888
What do you use?
Dec15-08 01:56 PM
templedog
0 1,446
I found this equation a=qE/m, for finding the acceleration of an electron. If I were to try to find the acceleration...
Jun24-12 07:27 PM
h1a8
1 1,132
hi i have come across a post regarding ignition spark in cars with waste spark management. and my question is... that...
Oct22-12 07:13 PM
davenn
18 1,407
what is RCS supposed to mean in physics, i have a quiz tommorow with that as a bonus question, i know it has something...
Nov12-04 12:25 AM
Pandemonium
1 1,326
I need to know what the "BEST" formula for me to use is... and I actually have 5 decimal places on all this data...
Nov5-09 06:33 PM
andpe
5 7,850
What is more important to the development of science and technology and the furtherment of human knowledge: Physics...
Jun18-04 04:27 PM
jcsd
19 1,755
Before I begin this thread, I will go ahead and tell you I do not have much experience in the field of physics....
Jan4-14 03:43 PM
my2cts
32 1,294
whats is the different between kienetic energy and momentum.with examples . i know the mathemetical...
Jan5-11 01:00 PM
Rap
9 1,430
http://www.youtube.com/watch?v=LwobvxK5ulc ok so this guy throws up a cup of hot water at like 45 below zero F. And...
Oct5-10 02:57 AM
James Leighe
6 2,027
why does peak of fire of a matchstick face upwards ie away from ground.why is it not effected by gravity,is there any...
Apr23-12 10:13 PM
K^2
19 2,839
Im just interested to know because apparently there is something faster than the speed of light and the fastest thing...
May16-13 09:05 AM
ZapperZ
5 894
Examples of these effects can be found here. http://en.wikipedia.org/wiki/Flanging...
Sep2-09 07:38 AM
9Vibes
0 1,154
I can easily picture joules per second (I just see light of varying intensities passing a point at varying rates) I...
Sep14-10 08:36 AM
0xCACA
3 2,805
Hello, I am a student in high schoool, and everywhere i look i see the obvious implications that light travels as a...
May19-04 01:57 PM
quartodeciman
3 3,788
I'm just wondering, with all these theories out there (M-theory, tachyons, anti-particles, etc., etc.) aren't they...
Mar31-03 11:22 AM
selfAdjoint
3 1,674
remember the directed energy weapons (or Star Wars) project? what kinds of thing did they create and why aren't they...
Jun10-03 04:10 PM
LURCH
1 1,301
Suppose I have a superconducting solenoid MRI magnet (cooled with liquid helium) producing a static magnetic field...
Oct17-09 06:44 AM
vabamyyr
7 1,029
this? http://www.newscientist.com/channel/space/mg18524911.600 I caught it in a post in another forum and I was...
Mar18-05 11:46 PM
KingNothing
3 887
Hello, a friend of mine has a "revolutionary" idea about harvesting wind power by using a "translational turbine"....
Mar6-12 09:22 AM
sophiecentaur
8 1,403
I've had this idea for a while. I can't see anything wrong with it. Maybe someone here can tell me if it's unsound. ...
Nov21-05 07:36 PM
FredGarvin
5 1,214
I was looking through a book on magnetism and it had the attached diagrams of field lines and stated that the...
Jan7-14 11:09 AM
Crazymechanic
35 998
Hello; For my coursework I am studying how changing the wavelength of a beam of light affects the index of...
Jul20-11 10:25 AM
FeDeX_LaTeX
15 3,851
"If a particle which has mass travel at the speed of light, the particle mass will reach infinity, which require...
Nov22-04 10:17 AM
marlon
3 1,452

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