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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
45,640 
Suppose we have a collection of conductors for which the voltage is specified on some conductors and the surface...

May1314 03:01 PM
komdu

2 
175 
Hey,
It's a simple question (hope so). How do you know (analitically) wether angular momentum is conserved based...

May1314 01:49 PM
stevendaryl

12 
465 
I am trying to calculate the maximum current drawn from a capacitor that is connected to a resistor of a very low...

May1314 02:37 AM
Pharrahnox

4 
251 
Hi,
In EM theory to derive the 'wave equation for electric field in a conducting medium' we make ρfree to be zero,...

May1114 02:55 PM
Shan K

18 
431 
Hi everyone,
I have recently been trying to make a nanoemulsion of an aqueous solution by means of Electrospray....

May1114 02:14 PM
Taylor

4 
215 
Afternoon all,
I am interested to hear any and all suggestions as to how one would go about modelling the rise in...

May1114 02:09 PM
Chestermiller

4 
258 
In griffith's intro to electrodynamics (4rth edition), ch. 3, pg. 121.
here is the second uniqueness thrm for the...

May1114 12:20 PM
WannabeNewton

3 
315 
Hi
1) I am reading Pippard's Classical Thermodynamics and was confused by one of his examples in the attachment.
...

May1114 09:51 AM
rkmurtyp

68 
2,488 
Has anyone ever "fired" an electron down the center of an evacuated tube (horizontally) to see if the electron follows...

May1114 09:20 AM
Vanadium 50

5 
363 
For any ensemble
##dw=f(p,q,t)\frac{dp dq}{h^{3N}N!}##
I do not understand this definition. ##f## is probability...

May1114 03:22 AM
LagrangeEuler

0 
209 
Hello,
It is said that any process accompanied by dissipating effects is an irreversible process.For...

May1114 01:57 AM
rkmurtyp

34 
1,120 
Good afternoon,
I am making way through this paper and I am having trouble "seeing" how the linear velocity AE is...

May1014 11:41 PM
HomogenousCow

7 
317 
Hello, I am having one question about whether we can realize we are moving in a system, or we think that everything...

May1014 05:10 PM
Matterwave

1 
236 
Hello, I am interested in knowing what happens ta wire trough which current is flowing, when an external magnetic,...

May1014 12:35 PM
UltrafastPED

5 
227 
here are the two equations i'm dealing with:
Eq. 1: $$W=\frac{1}{2}\sum_{i=1}^n q_{i}V(r_{i})$$
Eq. 2:...

May1014 02:00 AM
Jano L.

7 
318 
Hi, I am trying to formulate a 2D model to calculate the temperature change over time in a composite material.
The...

May914 10:46 PM
geetar_king

2 
263 
It is commonly said (based on a quick Google search) that wrapping your beer in a wet paper towel and placing it in...

May914 07:37 PM
Nugatory

28 
15,958 
My question is on using a form of the single variable Noether's theorem to remember the multiple variable version.
...

May914 05:09 PM
bolbteppa

2 
244 
Hi!
I would like to know that in what circumstances Hamilton's canonical equations are superior to the...

May914 02:12 AM
UltrafastPED

5 
256 
Our professor proposed a scenario during lecture that went like this, There is a wire of infinite length that has a...

May814 09:31 PM
agonydrum

9 
527 
Can we calculate the electric field at any given point in space even if there are no charged particles there? The...

May814 09:25 PM
jtbell

3 
216 
Hi,
considering the scalar wave equation
$$
{ \partial^2 u \over \partial t^2 } = c^2 \nabla^2 u
$$
(where ∇^2...

May814 01:53 PM
the_wolfman

12 
556 
How is the back induced current in the secondary coil transferred to the primary ? I know how mutual induction occurs...

May814 11:45 AM
kira506

16 
788 
I am trying to follow a Maxwell's equations derivation for light scattering but don't understand 'why' the authors do...

May714 03:19 PM
UltrafastPED

8 
286 
This follows on from an earlier post of mine, which is now closed. I can also now disclose that it refers to my UK...

May714 07:00 AM
rprosser

4 
317 
Let's say that you have an open tank of water and a hose connected to the bottom of it. Water is flowing out of the...

May714 05:38 AM
jbriggs444

16 
501 
This is for a personal engineering project. I need the parametric equations y(t) and x(t) for a very simple pendulum....

May714 01:21 AM
Simon Bridge

10 
319 
(Wasn't sure on the right section for plasma physics, I apologise if this is wrong).
I'm reading up right now on...

May714 12:48 AM
Jano L.

4 
305 
Hi
I want to develop mechanics of a problem which is as follows.
Suppose there is an inverted glass (cylinder)...

May614 04:07 PM
Hector92

1 
275 
Hi All
Let me start by saying that I am new to this forum and I am new to physics. I've always had an interest in...

May614 12:25 PM
jbriggs444

2 
236 
I have read numerous explanations as to why it is beneficial to launch a rocket in the eastern direction. I know that...

May614 08:24 AM
Lsos

23 
651 
Why are y and y' treated as independent variables, while they are not?
Another slightly related question:
if ' =...

May614 07:04 AM
UltrafastPED

2 
186 
If you apply 100 volts to a 10:1 transformer you will end up with 10 volts out. If you put a 10 ohm resistor on the...

May514 10:56 AM
enorbet

25 
1,072 
Using the Coulomb's law, the force between two protons inside a nucleus is about 14.4 N
Isn't that a colossal force...

May514 09:57 AM
jtbell

3 
268 
It's a simple question:
Why is Ienc in Ampere's Law in a toroid equal to µ0NI where N is the number of loops around...

May514 08:06 AM
Philip Wood

21 
655 
Hi,
I was wandering, sometimes in physics, to get acceleration from a velocity time graph, you would have to find the...

May514 06:12 AM
Chestermiller

2 
276 
Can anyone give a derivation for the screened potential of a point charge in a plasma in 3 dimensions?
Thanks

May514 02:35 AM
Shyan

0 
213 
Hi,
I'm trying to build a cat house and I thought I would calculate the exact thickness of insulating material I...

May514 12:56 AM
voko

3 
281 
Hi, I was just going over the moment of inertia for a 2D lamina, Ive been happy with writing the small mass element dM...

May414 03:50 PM
paisiello2

1 
212 
Using differential forms and their picture interpretations, I wonder if it's possible to give a nice geometric &...

May414 12:13 PM
marmoset

3 
272 