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Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 41,837
dear revered members, could u people let me the know the role of capacitors in the ignition system of automobile...
Aug29-09 06:57 PM
fleem
42 8,620
Hi! I've been looking at Mohr's circle and by and large I understand what's going on. I can see how if the...
Aug29-09 04:06 PM
Adder_Noir
2 2,510
Can anyone help me with this, i have done the first part, whereas i have obtained B using ampere's law. But changing...
Aug29-09 02:25 PM
Vanadium 50
2 1,372
Okay so i just want to make sure i got this right because its a kind of confusing topic for me. So eddy currents are...
Aug29-09 02:10 PM
DrDanger
6 762
I came across this from a book saying that: If all the co-ordinates and velocities are simultaneously specified, it...
Aug29-09 01:16 PM
Bob S
4 673
Hy, i am back with my annoying questions about this and that. Could everyone tell me why the frigging dipole have an...
Aug28-09 10:09 PM
maverick_starstrider
4 677
what is the meaning of deceptivness of field line?? i mean for 2d surface field line = n/2pi*r (f.l. inversly...
Aug28-09 10:04 PM
buffordboy23
3 550
My book (an old copy of Halliday-Resnick) gives a proof for the fact that the wave velocity is constant in...
Aug28-09 09:24 PM
Born2bwire
3 2,094
Hi, I am trying to calculate the power of a reflected electromagnetic field and can't find a physical explanation...
Aug28-09 09:12 PM
Born2bwire
1 1,233
Hello, my name is James Dallas and am new to this forum. I am a first year electromechanical engineering student in...
Aug28-09 07:44 PM
jamesdallas
0 1,974
Hello physics forum, I'm interested in modeling the pressure wave created due to the rapid inflation of a balloon. ...
Aug28-09 03:00 PM
Bob S
2 1,443
if we take a magnet and put in space, now we take another magnet and start to revolve it around the first, the...
Aug28-09 09:27 AM
RestlessMind
15 2,505
Alfven's theorem: The change of flux through any closed loop moving through a magnetic field of conducting material...
Aug28-09 05:32 AM
WiFO215
10 966
How do you add air resistance to these 2 equations? #1 sqrt(2 * d / g) = time until impact #2 sqrt(2 * d * g) =...
Aug28-09 02:09 AM
spaceshipone
13 20,586
I've been getting confusing explanation on what negative voltage represents. In electrolytic cells my teacher explains...
Aug27-09 11:50 PM
Red_CCF
32 8,392
Hello ppl, I'm new here. I'm trying to compute RK4 for N-body problem. But after computing I'm getting strange...
Aug27-09 06:32 PM
albatros
0 1,775
Hy folks! I am new in here.Anyone can give a basic intuition about why the acceleration formula actually works? I...
Aug27-09 05:26 PM
staetualex
5 650
There is a rod treating as rigid body, the rod which mass is m and lenghth is R rotate about one end of itself with...
Aug27-09 03:56 PM
redoxes
11 976
I thought of what seems to be a very classical problem but I can't find a solution for it. At t=0 you have a sphere...
Aug27-09 03:54 PM
PhaseShifter
1 707
Hi and thanks in advance for any help with this problem. If I have a very very well insulated tank of water of say...
Aug27-09 09:15 AM
stoody
4 5,643
i was reading the book of Griffin - introduction to electrodynamics. it is written that the force of charge q on Q is...
Aug27-09 07:53 AM
jtbell
7 989
Like a radioactive particle emit rays, does this similar to the field lines of a charged particle? at what speed...
Aug27-09 07:22 AM
DaleSpam
8 717
While reading a very interesting article/lecture called Life at Low Reynolds Number, there was a reference to a...
Aug27-09 01:12 AM
Vanadium 50
2 1,082
Hi guys, I'm going through Reif's book on statistical mechanics and have a question on the parameter omega, the number...
Aug26-09 11:30 AM
Sam_Goldberg
2 5,015
Waht is the work done by friction when a man is walking? zero or nonzero? I was analysing the work done by...
Aug26-09 11:10 AM
vin300
21 2,722
I have heard many times that the positive "inductive" part of a circuit's reactive power is equal to "L i di/dt". I...
Aug26-09 02:14 AM
bjacoby
1 5,442
RE: Ocean Waves: 1. Linear Wave Formula - What is the average sea state that is capable of producing a 20 ft. wave?...
Aug25-09 12:45 PM
Governor
12 1,291
Say I want to put a bottle of water in the microwave and heat it up. How do I determine the pressure in the bottle as...
Aug25-09 09:48 AM
Lok
7 2,148
The total energy of a pendulum is calculated either by it's maximum height (Gravitational Potential), or by the lowest...
Aug24-09 02:52 PM
DaleSpam
21 3,970
I need a couple of formulas to determine the live and dead load on a stretched cable for a zip line. They are: 1....
Aug24-09 12:40 PM
Marcpost
0 4,144
Do only electrons emit a photon when accelerated in EM field? Do protons, for example, radiate?
Aug24-09 12:30 PM
Bob S
3 1,523
Hi, I'm looking for a little bit of help in this matter, I'm trying to put up a general formula of the internal...
Aug24-09 04:11 AM
TriKri
9 4,735
I'll explain the problem. \cdots \cdots \cdots \cdots \cdots \cdots \ldots=====|====== \cdots \cdots ||...
Aug24-09 02:05 AM
WiFO215
2 578
Hello-- Suppose that I insert a thin-needle thermometer into a porous material (such as snow) that consists of air,...
Aug23-09 11:05 PM
nkinar
6 1,027
I'm reading the book "Electricity and Magnetism: Vol. II" by Edward M. Purcell, in which he describes Gauss' law as...
Aug23-09 10:10 PM
Born2bwire
3 980
I've learned that the electrostatic force is about 10^{39} times greater than the gravitational force. I guess the...
Aug23-09 11:35 AM
Naty1
15 1,244
Hi, Is it possible to have a magnetic field B which has curl B = 0 in all space? intuitivly such a field will be...
Aug23-09 02:08 AM
naftali
4 4,876
I was unfortunate enough to have sports on the days of my mechanics classes so I've basically missed most if not all...
Aug22-09 11:52 PM
Mentallic
3 676
Hey guys, I have the following (non-homework) problem: I am simulating a collection of normally distributed...
Aug22-09 08:37 PM
creepypasta13
1 726
I am trying to work out the physics used in a micro-controller project. I am having problems with even simple...
Aug22-09 12:43 PM
sganesh88
2 816

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