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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 41,748
Hi I have been looking for some simple equations that describe the turning moments on the rotor as wind direction...
T 05:21 AM
james6008
2 59
What's the original definition of Ohm, ampere, volt and coulomb, And which unit was defined according to the other...
T 04:00 AM
vanhees71
16 287
"A capacitor is being charged from a battery and through a resistor of 20 KOhms. It is observed the the voltage on the...
T 01:56 AM
astro2525
9 177
Hello, I am working on a project in which I want to project a projection back into a slide projector using a...
T 01:54 AM
LuukS
10 152
I am reading about the Asimov pendulum (see figure) The aceleration in spherical coordinates is ##\vec{a} =( R...
T 01:39 AM
Simon Bridge
1 93
Hi 1) I am reading Pippard's Classical Thermodynamics and was confused by one of his examples in the attachment. ...
T 12:13 AM
Red_CCF
60 1,023
Hello, I`m a bit confused about PV work. Here is the situation I am facing. δw = P dV and dw = F dx δw is...
Y 10:16 PM
Soumalya
57 1,054
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From the result of an experiment it seems to be that suction does indeed cause a force that causes a vacuum to move...
Y 02:51 PM
D H
9 198
Dear Experts A bicycle has the following gear setup. I like to get your advice what is the effective gearing and...
Y 02:15 PM
Andrew Mason
1 101
The title is enough
Y 04:35 AM
mfb
22 359
Looking for a way to increase magnetic forces in electrical devices, an option is reduce the air gap, but some times...
Apr18-14 09:04 PM
Simon Bridge
5 152
Helloo, I don't understand how one arrives at the conclusion that the hamiltonian is a generating function. When...
Apr18-14 08:27 PM
vasilis
4 160
Hey guys, It has been a while since I've done anything to do with magnetism and was wondering if I covered one side...
Apr18-14 06:33 PM
TumblingDice
1 99
If you'll allow me to disregard the effects of Strong Interaction, how would I calculate the Electromagnetic Force...
Apr18-14 04:12 PM
Drakkith
4 155
Since Lagrangian is a function of q, q dot & time, then why in describing the Hamiltonian (H), L does not involve time...
Apr18-14 01:57 PM
JonnyMaddox
7 234
Dear Friends, I carried out an experiment of sudden release of oxygen (open nozzle) from an oxygen cylinder used...
Apr18-14 11:16 AM
curioso77
8 166
I'm having a hard time understanding air flow caused by pressure differentials. Given the following contextual image,...
Apr18-14 06:54 AM
Chestermiller
13 222
I hope this is the right place to ask this. It is an experiment question. I have a 785 nm laser and a 1550 nm laser...
Apr18-14 04:38 AM
UltrafastPED
4 137
When a wire is placed in a magnetic field, Lorentz force acts on an electron in a direction perpendicular to velocity...
Apr18-14 04:16 AM
mfb
1 118
Hello, who can suggest me a book, or a PDF where i can find an introduction to Liouvillian operator in statistical...
Apr17-14 05:09 PM
oliveriandrea
0 110
Hi, all. Here is an expression about kinetic energy from analytical dynamics of Haim Baruh which confuses me. ...
Apr17-14 04:09 PM
JonnyMaddox
4 159
Hi, all there are equation in the pic but I cant understand them. I know work-energy principle which is W= F * X...
Apr17-14 04:03 PM
dauto
2 142
Hi, I have a 1m long, 10mm ID vertical tube attached to a vacuum system. I have a known flow rate of the air down...
Apr17-14 12:21 PM
bigfooted
1 103
Here is an excerpt from my textbook: "Ordinarily, this charge would simultaneously generate so large an electric...
Apr17-14 11:23 AM
lonewolf219
2 128
I get that by getting a charged object near an uncharged one, charges of the opposite sign are induced on the surface,...
Apr17-14 11:09 AM
Philip Wood
3 172
Since 2 splitted beams meet at ONE spot later on, we have just one beam which flows to the detector, therefore I...
Apr17-14 10:24 AM
Goodver
6 148
Hello experts! I was taking class of optical fiber and communication. My teacher was teaching the class via...
Apr17-14 09:29 AM
shayaan_musta
7 167
From my understanding, normal and anomalous dispersion are because the phase velocity is a function of k so it is...
Apr17-14 08:04 AM
vanhees71
2 94
From this figure we could see the axis of rotation of wheel is y axis and it's translational motion is along x axis ...
Apr17-14 07:32 AM
shivaniits
5 167
Hi. Btw: I haven't studied statistical physics yet, but I have studied the introductory course on thermodynamics. ...
Apr17-14 07:11 AM
ffia
0 98
Hello, I need data (articles and books) about what connection there is between the speed (or the power) of a...
Apr16-14 09:16 PM
curioso77
4 218
Suppose we have a planet of mass m orbiting a larger one of mass M along an elliptical path. If we use polar...
Apr16-14 06:17 PM
zalook
0 138
So, let's say a spacecraft at a large distance from any star needs to dump a tremendous amount of stored electrical...
Apr16-14 03:08 PM
nasu
3 167
sir in the graphs of electric field due to binary charge configuration why some curves are below x axis and some...
Apr16-14 12:53 PM
jtbell
3 99
Hi I am kind of Confused about an example in work done: It says that a man applies 250 N parallel to the slope to...
Apr16-14 06:30 AM
Doc Al
3 238
Is it possible to send enough light down a fibre optic cable to produce say 1000 Lumens? How would I go about...
Apr16-14 02:14 AM
UltrafastPED
6 142
Does a shock wave have a finite value that can be shared within a system? For example, if I explode a some...
Apr16-14 01:08 AM
Simon Bridge
1 115
http://s22.postimg.org/r41250uoh/reactive_moment_force.jpg Assume that the arbitrary-shape object shown has a...
Apr15-14 09:41 PM
FactChecker
6 136
After I have an expression for the stream-function in a problem, I can differentiate to get the tangential and radial...
Apr15-14 06:46 PM
wahaj
4 101

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