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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,870 
I have been reading Classical Mechanics by goldstein for over 2 months. I have encountered the concept of Virtual...

Oct411 04:06 PM
Erland

3 
2,825 
Hello all!
I am trying to work through and understand the derivation of the Legendre Polynomials from Jackson's...

Oct411 10:59 AM
matumich26

2 
1,687 
Is the index of refraction for LCP/RCP light any different from that for linearly polarized light?

Oct411 10:51 AM
DrDu

2 
1,784 
Hi all.
I am a student taking A levels, I was hoping the forumites here could help me answer some doubts that I...

Oct411 10:12 AM
Philip Wood

6 
1,249 
As part of my project, i have to calculate the coercive fields of a circular disc of 50nm and 100 diameter with 4nm...

Oct411 08:18 AM
pranavreddy

0 
685 
Hello,
Why doesn't a standing truck move even after applying a large force by a little boy? Is it due to inertia of...

Oct311 10:35 PM
1mmorta1

3 
1,006 
http://img89.imageshack.us/img89/3914/unled23g.png
Uploaded with ImageShack.us
F1x+F3x = density x Q(Vx2 – Vx1)...

Oct311 06:10 PM
defdek

2 
1,499 
So I was sitting on the train last weekend, reading through my physics book on mechanical work and its relation to...

Oct311 04:05 PM
Ken G

1 
1,334 
In solids there are crests and troughs. In highly polished surfaces there are molecular forces. But what creates...

Oct311 02:46 PM
rcgldr

2 
1,063 
Hello guys
This is my first post and i am glad to be a member of this forum. There is something bugging me for alot...

Oct311 01:31 PM
miko1977

13 
1,234 
I started another post about this but I made things needlessly complicated by talking about nonideal gasses. My...

Oct311 10:20 AM
prashantjha

8 
4,009 
I was wondering what occurs when light encounters a slit that happens to be smaller than the wavelength of light...

Oct311 08:37 AM
Andy Resnick

2 
1,269 
I'm having a play around with a simple radiation detector that has 2 electrodes with a slab of uniformly doped silicon...

Oct311 01:33 AM
mitch_1211

0 
803 
I want to find out the power required to run the turbine and the pressure of steam required to maintain the power...

Oct311 12:58 AM
mitch_1211

1 
1,628 
I have a parallel plate capacitor with a dielectric inside whose relative permittivity varies as εr = βexp(\alphax) ...

Oct311 12:53 AM
mitch_1211

4 
1,138 
what is the difference between the two?
i thought fermi golden rule is enough

Oct211 10:13 PM
wdlang

0 
1,903 
I'm not exactly sure where to ask this question but I would like someone to please help explain to me how to...

Oct211 07:32 PM
Doc Al

5 
4,347 
I'm currently studying Classical Electrodynamics, and I see everywhere that the flux of a field through a surface is...

Oct211 05:31 PM
Qubix

3 
742 
Suppose that you have a sheet of copper that carries a surface charge of \sigma on each face. The electric field just...

Oct211 04:33 PM
matumich26

9 
2,967 
I can't figure out what is the motion of a charged particle at rest at origin in a constant uniform magnetic field...

Oct211 02:25 PM
jfy4

3 
1,547 
Water waves are one half kinetic energy and one half potential energy. The quote below comes from the Wikipedia wave...

Oct211 01:42 PM
fizzle

33 
5,633 
So I was debating whether or not to post this in the homework session but I feel the question I'm asking belongs here....

Oct211 12:37 PM
CleverName

0 
688 
I have problems understanding the use of negative signs in SHM. ie. mx''=kx
Why is there a negative sign for...

Oct211 11:04 AM
Doc Al

1 
733 
Before I get pounced on by academics from near and far, I just want to mention that I'm no longer a college student...

Oct211 10:33 AM
zanthal

2 
749 
hey, I want to ask you something about to calculate the moment of inertia for any shape.
My problem is that I can...

Oct211 08:57 AM
opeth_35

6 
884 
Concerning the Convex Lens and my diagram attached, when an object is placed exactly at the principle focus (focal...

Oct211 08:26 AM
Yh Hoo

13 
2,358 
Hi,
If we describe a beam splitter as follows:
e^{ikx} > \sqrt{T}e^{ikx} + \sqrt{R}e^{i\theta}e^{iky}
e^{iky}...

Oct211 02:45 AM
McLaren Rulez

1 
1,470 
I have a problem i am trying to solve, the question is;
Calculate the velocity ratio for this system. If the work...

Oct211 12:30 AM
mitch_1211

1 
4,382 
Really can't figure this out by dividing x and y. The only way i can do it is with equations that use quadratics and I...

Oct211 12:01 AM
mitch_1211

8 
2,270 
why is rainbow always an arc?

Oct111 11:49 PM
DaveC426913

15 
2,552 
When I was a kid listening to a transistor radio under my pillow late at night I used to wonder whether turning the...

Oct111 06:24 PM
vk6kro

2 
991 
This will probably be a very basic question, but is the effect that gravity has on light, similar to the faraday...

Oct111 05:48 PM
mangaroosh

0 
653 
Hello everyone!
After having being asked to help prepare a simulation(using computer programming), for the...

Oct111 11:49 AM
danielakkerma

11 
1,592 
Hi,
I've tried to figure this out but I just can't! Please help me understand how to work it out???
A ballistic...

Oct111 01:40 AM
mitch_1211

3 
2,084 
If I draw a displacementdistance graph and a displacementtime for two wave forms, will both graphs look the same?...

Oct111 01:17 AM
Philip Wood

2 
898 
How close is this assumption to reality.
Take for example a parallel plate capacitor with charge Q and Q. Connect...

Oct111 12:55 AM
mitch_1211

1 
926 
I am totally lost about the idea of electric potential and work. sometimes the book defines work as negative and...

Sep3011 11:12 PM
rcgldr

1 
778 
Because of the kinetic energy and frames of reference thread:
http://www.physicsforums.com/showthread.php?t=534883...

Sep3011 09:01 PM
rcgldr

0 
939 
hi,
if i have a cylindrical rod of copper and i heat is at one end face while the other surface areas are open to...

Sep3011 07:06 PM
gsal

2 
4,790 
Energy density of supercap is equal to square of it`s voltage.
Is it possible to join together advantages of...

Sep3011 01:07 PM
Stanley514

8 
4,470 