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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,831 
What is the potential energy of a uniformly charged spherical shell; i think it is called the self energy of shell.

Feb308 11:19 AM
Shooting Star

13 
9,885 
Hello, everyone. I've been working with this physics problem for about a week without much success, and this looked...

Feb308 10:22 AM
DaleSpam

4 
1,495 
Hello i need this för a coding project im currently occupying myself with =)
ok so the system is in a 2D space, the...

Feb308 10:03 AM
DaleSpam

4 
4,223 
Hello!
I have a question arising from my course in statistical physics: Describing microcanonical, canonical and...

Feb208 04:17 PM
Mapes

3 
1,513 
So I'm reading "Mathematical Physics" by Donald H.
Menzel, and I don't buy the following derivation from
...

Feb208 01:46 PM
John Creighto

2 
1,843 
Got this question somewhere: A boy is standing on a rotating platform. The system has a kinetic energy 'K'. Now, the...

Feb208 12:34 PM
lightarrow

5 
1,336 
Consider int(E.dA)=q/e, guass law relating the electric field to the charge enclosed.
One can also derive (using...

Feb108 10:23 PM
user01

6 
2,867 
In classical Hamiltonian mechanics, the concept of a canonical transformation ("CT")
preserving the form of...

Feb108 06:29 PM
strangerep

0 
1,263 
Hello All,
I am new to this forum, and right up front I will say I know very little about physics in general. That...

Feb108 11:28 AM
Andy Resnick

1 
1,437 
in my fields course we are using the metric tensor g=diagonal(1,1,1,1), off diagonal(0)
i'm looking for an...

Jan3108 09:44 AM
jcsd

4 
1,579 
what is the difference between classical mechanics and quantum mechanics??
other than that classical mechanics...

Jan3008 03:35 PM
samalkhaiat

14 
2,390 
I'd like to see an example of a formula describing the position of a rolling ball over time. It has been given one...

Jan3008 03:15 PM
PatPwnt

3 
2,324 
Is there any material such that if you make a hollow object out of it, the magnetic field inside is not equal to the...

Jan3008 12:02 PM
Ulysees

9 
11,465 
Is there any situation where the electric field drop exponentially in free space? thanks

Jan3008 10:54 AM
jdavel

5 
1,864 
Hi,
(All oscillations I'll be talking about here are longitudinal.)
For coupled oscillations of 2 masses between...

Jan3008 07:05 AM
pam

1 
1,902 
If not, then what are the conditions for us to construct a periodic boundary condition(PBC)?
If so, then please help...

Jan2908 10:07 AM
qijiongli

4 
4,241 
Hello All,
I just read in a book that springs are pretty much analogous to capacitors in terms of energy...

Jan2908 07:47 AM
TVP45

1 
3,340 
Hi all.
Picture a series of strings around a circle, oscillating with fixed ends. Now picture a these strings as...

Jan2808 10:40 PM
SteveDB

0 
1,142 
I'm looking to simulate a bouncing and spinning ball in two dimensions. I have the detection working fine but I'm...

Jan2808 10:23 PM
gcoope

0 
1,592 
I am constructing a 'white line detector' to use on the underside of a robot. The crucial components are an...

Jan2808 11:45 AM
joeisthedude

0 
3,217 
I'm attempting to write a simple model to describe the angular velocity profile (aka angular acceleration) of a...

Jan2808 09:20 AM
vortmax

3 
2,387 
Hello,
I am a computer science researcher and I have had my last physics and math courses several years ago so I...

Jan2808 03:31 AM
wmac

0 
1,614 
If I have a vector for the angular momentum of a ball rolling along a plane in terms of the world and I wan't to...

Jan2808 02:41 AM
Bobolis

0 
6,073 
What would wobble more easily... a thin hoop or a solid disk of the same mass? A solid disk will have a lower moment...

Jan2708 11:07 PM
jambaugh

2 
2,031 
Hello, is it possible to create a pressure wave from any form of electromagnetic radiation that travels inward to a...

Jan2708 03:01 PM
plutoisacomet

3 
1,734 
I am actually trying to solve a problem from fluid mechanics. The especifications of the problem are on the...

Jan2708 01:19 PM
DaleSpam

1 
2,388 
The force on a single dipole (dipole moment m) can be obtained by taking the gradient of its energy, i.e.
\vec{F} =...

Jan2708 11:09 AM
da_willem

2 
1,394 
Why does the following hold?
\int _0 ^H \nabla H dH =0
The book I'm reading (ferrohydrodynamics by Rosensweig)...

Jan2708 04:00 AM
da_willem

0 
1,623 
Here I have a translation from French to English of the original paper by Poisson about his brackets. I cannot...

Jan2608 03:27 PM
gibsonphysics

2 
1,238 
A horizontal cylinder is fit with a frictionless and massless piston. Inside the cylinder there is a monoatomic gas....

Jan2608 11:07 AM
Hootenanny

1 
989 
Is it possible to obtain the relation
S = \log Z + \langle U \rangle /T
directly from the Boltzmann distribution?
...

Jan2608 09:48 AM
Argyle

6 
7,635 
I was wondering, can the friction force be split up? Suppose you have a friction force working under an angle alpha,...

Jan2508 05:41 PM
NoobixCube

4 
1,727 
(I know that it's easier to get water to boil att lower pressure...)
The goal is to get the water to an temperature...

Jan2508 07:54 AM
RonL

11 
3,540 
if we think the height of a matter reaches over the radius of the earth how will the potential energy of it change?...

Jan2508 05:43 AM
sandoko

5 
3,628 
When can you define temperatures for the molecular energy storage modes (i.e. translational, rotational, vibrational)?...

Jan2408 09:10 AM
pkleinod

1 
1,497 
I tried posting a similar question before, however, I've found the 1 reply is actually wrong. Hopefully with better...

Jan2408 08:16 AM
Andy Resnick

2 
12,897 
For nonequilibrium conditions, can temperature be defined?
Does this relate to the zeroeth law of thermo?
Thanks!

Jan2308 03:25 PM
Andy Resnick

1 
1,924 
What is the speed? If the speed of electricity is c, then how is it possible that an electron, with a rest mass, can...

Jan2208 05:37 PM
chroot

17 
4,248 
Hello!
Would you say that the following text is true from beginning to end?:

Basically,...

Jan2208 05:06 PM
fortaq

2 
2,753 
According to Noether's Theorem, for every symmetry of the Lagrangian there is a corresponding conservation law, and...

Jan2208 05:34 AM
lugita15

26 
3,494 