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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
170 192,049
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 71,138
i have a measurement which has random uncertainty of 0.02 and scale reading 0.01. how do i combine these uncertainties...
Jan29-12 03:41 PM
mathman
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how does it make sense that in SHM the acceleration of a pendulum is 0 when it pases through its eqm point? surely as...
Jan29-12 02:57 PM
technician
1 953
I've often observed the sky in the late evening and it was dark. But on cloudy days, the sky is actually bright. The...
Jan29-12 01:40 PM
MarkOlenick
13 22,684
I have a question here about Maxwell's equations: according to faraday's law at some point in space changing magnetic...
Jan29-12 12:04 PM
pabloenigma
3 1,571
hi there i am looking for monochromatic colored filters like on the picture on the following web page: ...
Jan29-12 11:39 AM
sophiecentaur
1 1,936
Does electricity travel through vacuum?If so ,is it a good conductor?What is its resistance.
Jan29-12 11:13 AM
sophiecentaur
8 4,025
I was wondering if I could match and exceed the 20-joule effect of a springpowered rifle by replacing the spring with...
Jan29-12 11:02 AM
hardraade
0 764
I know about the shell theorem and that the force of gravity due to the mass of the shell is zero inside a spherical...
Jan29-12 07:45 AM
Doc Al
8 2,829
Does anyone know the highest altitude the biggest industrial grade weather balloon can go?
Jan29-12 05:50 AM
Drakkith
1 1,255
I was out walking my dogs at 3:00 a.m. (that i might let them off the leash to be dogs for awhile) Over my head...
Jan29-12 05:06 AM
MarkOlenick
0 1,019
I have a question about electricity and magnetism. My teacher went through these chapters in 3 days, and I am...
Jan29-12 02:55 AM
Bobbywhy
2 1,435
A container filled up to about 2/3rd's with water moves with a unifrom acceleration of 'a' due to a force 'F'....
Jan29-12 02:38 AM
olivermsun
9 2,559
If a bullet is fired from a gun in vacuum(assume no gravity, no resistance). why is it that the bullet accelerates...
Jan29-12 02:27 AM
rajeshmarndi
3 1,667
Isn't it that magnetic fluxes only mean the surface of a magnetic field? Is it smooth? But in the Aharonov-Bohm...
Jan28-12 08:51 PM
rodsika
0 1,032
can temperature be changed without changing pressure as well as number of molecules for an ideal gas?
Jan28-12 08:26 PM
kjamha
3 1,457
I want to know, seeing as space-time is supposed to be curved and a wormhole bisects that curve, whether the curve is...
Jan28-12 07:32 PM
HarryRool
2 2,191
Please again a fundamental question. Can anyone explain what is a Campbell diagram and its application? IS it a...
Jan28-12 05:58 PM
schizo
5 11,290
hi... Maximum and minimum thermometers has two mercury columns. One column goes up when temperature increases and the...
Jan28-12 04:36 PM
Vanadium 50
2 9,174
I don't understand why 4 ∏ is in so many physics formulas. For instance, Heisenberg's uncertainty uses h / 4∏....
Jan28-12 04:24 PM
tucanaz
3 1,399
Hi I've been scratching my head late into the night, and come up with some ideas for a moon pod, I could use a sanity...
Jan28-12 04:20 PM
DaveC426913
3 944
---------------------------------------------------------------------------- I know about the shell theorem and...
Jan28-12 03:30 PM
Doc Al
1 1,042
In my physics text book, temperature is defined as a measure of the average KE of random translational motion of...
Jan28-12 01:37 PM
juanrga
10 2,607
Evening, I'm trying to work out the direction a loop of wire will rotate about an axis in an increasing magnetic...
Jan28-12 01:13 PM
technician
5 2,451
Why is the number of charge carriers per unit volume is inversely proportional to resistance?If there is more charges...
Jan28-12 12:49 PM
tobytoby123
5 2,723
So, I understand that when reynolds number increases, the fluid becomes more turbulent, and there is a greater energy...
Jan28-12 12:33 PM
thereisnospoo
0 2,427
You often see the polarization of light represented this way:...
Jan28-12 11:33 AM
edguy99
4 1,440
Noob here, be gentle… I am of the understanding that the solar system formed by means of an accretion disk that...
Jan28-12 08:26 AM
Ed Zachary
2 1,455
Friends: My boss and I have been debating this physics problem: Imagine that you have a cable suspended in...
Jan28-12 12:56 AM
Simon Bridge
5 1,413
A professor at my university is currently working on using "complex network theory to study the coherence of flows in...
Jan27-12 11:29 PM
Bobbywhy
2 1,104
The Wikipedia article on the moon says ithat "Ptolemy (90–168 AD)" calculated the distance of the moon as 59 times the...
Jan27-12 07:42 PM
jedishrfu
1 1,696
I had a general idea back in the day dubed "the owie stick". after seeing the movie "district 9", about how the...
Jan27-12 04:19 PM
berkeman
8 1,155
Hey, A certain problem in my physics textbook states that a person pushes a crate over a frictionless surface with...
Jan27-12 03:35 PM
technician
8 1,370
I am working on a desalinization project and need technical advice. These are the basics: If I have a 1,000 sq ft...
Jan27-12 03:30 PM
pmg7p
4 1,269
Hello everyone I am trying to do an experiment involving a W bulb, in which I am completely dependent of knowing...
Jan27-12 02:28 PM
Zoroaster
2 1,087
I feel like I should know this but I'm not sure that I do... What is the difference between harmonic and...
Jan27-12 02:02 PM
technician
1 1,532
Dear friends, my A-level physics tutor used to use a software to explain things to us...but unfortunately i dont...
Jan27-12 01:43 PM
hassan_shohag
0 891
If a satellite orbiting the earth exploded and the debris went hurtling into space at 1000mph how far would the debris...
Jan27-12 01:07 PM
shifty88
2 847
Can you draw a force diagram to explain how a positive caster angle makes wheels return to a straight line in a...
Jan27-12 12:08 PM
Charles123
3 2,498
I work in a sports science laboratory and I've been set the task of trying to create a simple and inexpensive test to...
Jan27-12 11:00 AM
netgypsy
13 1,817
I am a bit hung up on this fact. Say you have a pendulum and you want to derive its equation of motion. In doing this...
Jan27-12 09:54 AM
MrAnchovy
7 1,115

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