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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,836 
I know what is circulation by a mathematical point of view, but in the reality (in the physical world), what is...

Jun1214 10:54 PM
Jhenrique

8 
556 
Why others vector fields no are studied like the magnetic and electric fields? In other words, why others vector...

Jun1214 10:37 PM
Jhenrique

5 
237 
How do you write out the potential of an ion in a Penning trap? Specifically, how does the interionic Coulomb...

Jun1214 08:02 PM
rigetFrog

1 
241 
I don't know how to integrate the MaxwellBoltzmann distribution without approximation or help from Maple.
Given...

Jun1214 02:23 PM
TeslaPow

11 
385 
Hi everyone,
If you have a horizontal circular motion (with gravity action on the object), what holds the object up...

Jun1214 08:09 AM
ramanakumars

5 
273 
For an infinite plane sheet of charge it is obvious that the Efield points directly perpendicular to the sheet. but...

Jun1214 07:17 AM
vanhees71

3 
262 
Is it to identify something (not necessarily very accurately but at all) with sound? Also, i know its possible with...

Jun1114 11:48 PM
dauto

11 
291 
There is a book with very briefly theory, showing the essentials for make the exercices of electrodynamics, and also...

Jun1114 08:34 PM
UltrafastPED

1 
203 
Hello,
Can someone explain what's going on in equations 196 and 197:...

Jun1114 08:12 PM
pierce15

4 
229 
When a circuit is being alimented by AC this means that exist in the circuit a voltage source that is generating the...

Jun1114 06:57 PM
Jhenrique

6 
286 
Hello everyone, it's been a while since I've been introduced to Newton's laws for the first time. Yesterday I've been...

Jun1114 12:16 PM
stevendaryl

33 
1,150 
I'm trying solve this scheme:
http://www.physicsforums.com/attachment.php?attachmentid=70441&stc=1&d=1402248289
...

Jun1114 08:44 AM
Born2bwire

7 
286 
This is not a homework question.
Whilst looking over at previous exam papers on classical physics, I came across...

Jun1114 04:44 AM
Adithyan

3 
203 
So, I'm trying to study phase shift in an unbalanced rotating system (where "phase shift" means the resulting response...

Jun1014 10:21 PM
diffusegrey

4 
288 
When a object of mass non insignificant is traveling in space and is sob influence of one gravitational field, the...

Jun1014 07:08 PM
UltrafastPED

1 
195 
Hello.
I've got a question.
If we've got a fourietransformation of charged particle field, ...

Jun1014 03:11 PM
sukharef

0 
155 
As we all know, if a car happens to be struck by lightning its passengers will probably be safe. The usual explanation...

Jun1014 11:27 AM
D H

15 
482 
This question is a variation on another question I asked recently.
Suppose you were in a box made from a perfectly...

Jun1014 04:25 AM
Drakkith

13 
341 
Is possible to associate voltage sources and current sources by a delta scheme or by star scheme?

Jun1014 03:44 AM
Jhenrique

0 
177 
Question:
A block of mass 10 kg moving with a velocity of 1 m/s collides with a spring of force constant 1000 N/m....

Jun1014 03:01 AM
Jilang

17 
421 
I'll assume that we all know of 1st, 2nd and 3rd Class Levers.
Years ago I saw a brief remark in a magazine that I...

Jun914 11:53 PM
Saxon Violence

2 
215 
I have read that in a charged conductor, all the charge is located at the surface of the conductor and the Electric...

Jun914 11:22 PM
hamza201195

3 
203 
When:
 Vacuum had an absolute mass, relatively limiting expension of all universal matter
 Newton's second law...

Jun914 06:03 PM
micromass

3 
223 
Hi,
My question is how do do laser interferometers measure distances of more than one wavelength?
I know they rely...

Jun914 02:00 PM
Andy Resnick

2 
193 
Hi all,
Here is the derivation of kinetic energy from Work:
W = ∫Fds
From the second law of motion F =...

Jun914 01:32 PM
UltrafastPED

5 
342 
The equation for this physical model is:
http://upload.wikimedia.org/wikipedia/commons/f/fb/RLC_series_circuit_v1.svg...

Jun914 09:24 AM
Born2bwire

1 
217 
I'm developing a classical model of a dipolar ion in an external electric field. It consists of two charges...

Jun914 09:21 AM
DrClaude

2 
239 
How would be the 2nd Kirchhoff's law for this circuit here:
...

Jun914 08:25 AM
CWatters

8 
284 
If in a typical complete circuit (RLC) we have a resistor with resistence R, an inductor with inductance L and a...

Jun914 08:00 AM
Simon Bridge

18 
441 
A ideial voltage source has:
v = v
i = ?
R = 0
L = ?
C = ?
ideal current source:
v = ?
i = i

Jun914 06:16 AM
Nick O

14 
284 
How equate the voltage/current of the associated sources with the voltage/current equivalent?
...

Jun914 05:26 AM
Jhenrique

14 
303 
This is sort of statics, but this came up in my physics class before.
You have a plate, supported only in the...

Jun914 12:40 AM
Simon Bridge

3 
201 
I am reading introductory physics from Serway. Where they say if a_r is radial acceleration and a_c is centripetal...

Jun914 12:33 AM
D H

3 
268 
If invisid flow starts with no vorticity then no vorticity will be produced. This can be understood
intuitively: we...

Jun814 11:31 PM
boneh3ad

3 
224 
The concept of a problem is that if rockets continue to jettison fuel, at some point they will get a very small...

Jun814 08:13 PM
MSpeezy

8 
308 
If we know the initial momentum of particles a and b (mass a and b, initial velocity of a and b),
is it possible...

Jun814 06:14 PM
mathman

2 
149 
All the derivations of the RayleighJeans 'Law' I've seen assume that the electromagnetic radiation is enclosed in a...

Jun814 05:51 PM
Jano L.

8 
310 
If a battery has 6V of voltage, this means that P+ – P– = 6V or that P– – P+ = 6V ?
Being:
P+ = electric potential...

Jun814 04:03 PM
UltrafastPED

7 
229 
What's the mechanism behind things like sparks, lightning, St. Elmo's fire, etc.? I've heard two different...

Jun814 01:28 PM
ZapperZ

2 
223 
How does friction come about using the four forces?

Jun814 10:49 AM
adjacent

3 
214 