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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
168 189,812
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 70,290
Hi, I am stuck with a problem calculating the image that a single fluorescent molecule will give on a camera when...
Dec28-08 05:00 AM
Max Ulbrich
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gravitation constant has been determined experimentally by cavendish. Its value has been found to be always a...
Dec27-08 10:44 PM
DrChem
6 1,686
What does a capacitor serve when it is connected in parallel to a motor............ as we see in most of the good...
Dec27-08 09:35 PM
Burningmace
7 5,081
if our weight is 42 kg in a weighing machine , in reality is it more or less than 42 kg?
Dec27-08 09:34 PM
Gnosis
3 1,285
i know the usual examples of Pascal's principle (PP) and applications to pistons involves applying a force on the...
Dec27-08 10:54 AM
stewartcs
8 1,444
I was sort of thinking of how intelligence fits in with entropy. I didn't fully read how the issue of Maxwell's Demon...
Dec27-08 06:09 AM
Gear300
6 1,560
From what I understand of the second law of thermodynamics, the tendency for overall entropy to increase is...
Dec27-08 02:06 AM
mosarani
0 927
Hey! The equation of state that connects pressure and energy density is: p=w\rho But what is w??? Thanks!
Dec27-08 01:50 AM
stevebd1
1 1,066
Having this discussion on another board, basically stemmed from one member saying that a bullet would be in flight for...
Dec26-08 11:04 PM
rcgldr
3 2,976
Please help me with the following simple and dumb questions: First, assumptions: - Ignore atmospheric pressure. ...
Dec26-08 04:32 PM
sai_2008
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Lets say you are looking through a two way mirror on the side where you can see through it, and there is a mirror on...
Dec26-08 03:47 PM
Doc Al
5 1,243
This is a really basic question but, why are the electrons revolving around the nucleus, why not just stick to the...
Dec26-08 02:05 PM
Gear300
19 1,701
How come the energy of an electromagnetic wave depends only on its frequency? Given by E = hf. How come the...
Dec26-08 12:22 PM
Renge Ishyo
2 3,049
What would happen? Why
Dec26-08 11:42 AM
sai_2008
1 3,084
I think a ceiling fan would increase air pressure in a room, whilst an exhaust fan would decrease pressure if it was...
Dec26-08 05:56 AM
Borek
6 2,871
On Dec 25, 3:33 pm, "Jay R. Yablon" <jyab...@nycap.rr.com> wrote: > Fair enough, I recognize the need to carefully...
Dec26-08 05:00 AM
Igor Khavkine
0 916
On Dec 22, 5:23 pm, Arnold Neumaier <Arnold.Neuma...@univie.ac.at> wrote: > kushal schrieb: > > > > > Given an...
Dec26-08 05:00 AM
kushal
3 1,737
All -- Many moons ago I thought I heard a professor refer to a "theorem" in mechanics which stated that if a hard...
Dec26-08 12:06 AM
Phrak
4 1,595
Flip wrote: > Greetings -- I'm a bit confused about the SL(2,C) indices of the > barred vs. unbarred Pauli matrices....
Dec25-08 05:00 AM
Rock Brentwood
2 1,877
Greetings to all I apologise if this has already come up before, I found many related topics on these forums but...
Dec25-08 04:29 AM
REEPER
0 4,609
Lets say you had a box who's inside walls were perfectly reflective. In addition to this, because you are just so...
Dec25-08 01:52 AM
mrpeach32
71 7,181
Hi, I know that energy is neither created nor lost based on everyday observation but how about E=mc^2 when mass...
Dec24-08 04:34 PM
Georgepowell
14 1,434
Hi I have done a lot of digging on the net for some answers about light interaction with solids and can't find some...
Dec24-08 11:07 AM
wdoe999
2 1,218
What equations would I need for calculating this, say if I wanted to know what the power/intensity of an x watt, x...
Dec24-08 07:47 AM
Vanadium 50
3 2,266
I want to advect a surface using the fluid velocity using semi lagrangian advection. The fluid is in a box, that is...
Dec24-08 03:34 AM
udvat
0 3,009
What is magnetism?...preferably no links to other sites...just a conceptual answer...
Dec24-08 02:08 AM
Gear300
10 1,469
Somewhere I read that the reason of halo doping in the MOSFETs is to increase the average doping of channel as the...
Dec24-08 12:57 AM
amitrt
2 7,389
Does the lorentz force occur at the atomic level?
Dec24-08 12:03 AM
jambaugh
3 1,320
Trying to determine the strength of an electromagnet in Teslas, with an iron core. Some sites have the same basic...
Dec23-08 06:04 PM
mgb_phys
1 5,573
What does this mean?
Dec23-08 06:00 AM
Danger
2 7,358
I just came across a topic on "Linked Rigid Body Collisions" ... For single Rigid Body Collisions, it is possible to...
Dec23-08 05:07 AM
lumjx
0 1,237
16th International Symposium on Metastable, Amorphous and Nanostructured Materials ISMANAM 2009 Beijing, China....
Dec23-08 05:00 AM
gyf0406@gmail.com
0 1,412
16th International Symposium on Metastable, Amorphous and Nanostructured Materials (ISMANAM 2009) Beijing, China...
Dec23-08 05:00 AM
li.yan.mse@gmail.com
0 3,894
Flip wrote: > Greetings -- I'm a bit confused about the SL(2,C) indices of the > barred vs. unbarred Pauli...
Dec23-08 05:00 AM
Hendrik van Hees
1 1,266
Theo Wollenleben schrieb: > Let (e_mu)^a be a basis of V. Then the dual basis (e^mu)_a is defined > by > > ...
Dec23-08 05:00 AM
Theo Wollenleben
6 981
Hey guys, I was looking for this information all over the internet and couldn't find ANYTHING. My question is: What...
Dec23-08 03:39 AM
Danger
2 1,419
I'm not sure if this is the correct area to post, but I figure if I'm wrong it'll be moved or something. I'm...
Dec22-08 07:49 PM
stewartcs
2 3,229
I have recently redesigned an antique falling block single rifle action and need some help calculating the poundage of...
Dec22-08 05:31 PM
schroder
15 2,925
This is an elusive subject with added order of magnitude. If that doesn't make sense, well... It tells that I'm...
Dec22-08 03:46 PM
Beer w/Straw
6 2,249
Hello, Having a little chat in the pub last night, we got on to skydiving vs bungee jumping. I said I would rather...
Dec22-08 02:27 PM
DaleSpam
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