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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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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 41,680
Hi, the title above is a specific instance of a more general question. I'm basically wondering why the atoms in a wall...
Jul14-09 07:48 AM
anant25121986
5 13,350
Can anyone provide a brief explanation what an EM mode is? I've read some EM theory, but still have problems...
Jul14-09 03:56 AM
Born2bwire
1 702
I've been following along with Lenny Susskinds lectures on modern classical mechanics on youtube. at 34:30 he...
Jul14-09 02:38 AM
adkinje
2 1,193
I was going through wikipedia and other online 'resource' sites trying to to find an answer to this question, and the...
Jul13-09 09:04 PM
Bob S
6 1,683
If we launch a satellite to a circular orbit around the Earth at height 357.1 km, to find the velocity needed at...
Jul13-09 07:48 PM
Bob S
5 1,152
Let's say we have an electric field, (ax, 0, 0). (a is a constant) The divergence of the field is a, so the...
Jul13-09 03:22 PM
clem
4 5,661
What is a general definition of temperature that can be applied to an arbitrary system? My best guess so far was:...
Jul13-09 01:21 PM
Gerenuk
10 1,578
Imagine that you have N points scattered in the plane. Each point is charged and contributes to the total potential...
Jul13-09 11:01 AM
woertgner
2 552
Can any one tell me what the velocity of air coming out a valve of a tyre pumped to 200 kPa would be? What...
Jul13-09 09:26 AM
FredGarvin
8 744
When you increase the charge Q on a capacitor, why don't you increase voltage V across it as well? Wouldn't higher Q...
Jul13-09 08:39 AM
Dadface
5 2,354
obviously the root-means-square speed value is greater than the average value. Question is to why the...
Jul13-09 08:19 AM
cipher42
2 10,122
I was discussing this with a friend: Say you are doing a tailwhip on a bike (bike spins around pivot at headtube) ...
Jul13-09 04:41 AM
joshd
2 669
If it takes 10 min to hard boil 1 egg, how long will it take to boil 2?
Jul13-09 12:50 AM
pixel01
24 1,698
In what condition is the acceleration of a falling parachute is zero?
Jul12-09 09:42 AM
vin300
8 658
Disclaimer: English is not my native language. I'll try to do my best, but i could put some inappropriate term...
Jul12-09 09:40 AM
Kibuzo
2 1,178
There's something I struggle to understand. In the picture I attached to this post , the first drawing is a system...
Jul12-09 07:20 AM
Pnume
2 701
The following came from a discussion about launching a balloon. Suppose you have a heavy coiled rope of total...
Jul11-09 08:52 PM
PeterPumpkin
8 1,253
I know that we can find the speed of the wave in shallow water by: c^2 = gh but how do we derive it?
Jul11-09 05:55 AM
poilop
2 4,317
please can you lookm at my video on youtube and give comment,if you think im mad say so,if you think it looks right...
Jul10-09 11:58 PM
Born2bwire
5 1,708
Pseudo forses arising in a frame are defined as the negative of mass times acceleration of the frame used. now in...
Jul10-09 05:12 PM
tiny-tim
2 865
Theres this retard on another forum preaching that matter travels as waves. And that he once calculated the amplitude...
Jul10-09 04:45 PM
turin
18 1,603
Here's the good explanation. ---------- A surface is an abstract mathematical tool that we can use to explore...
Jul10-09 04:27 PM
turin
1 526
I saw a teacher today with a piece of chalk tied to the end of a string (for drawing circles and such on a chalk...
Jul10-09 02:52 PM
rcgldr
5 970
Hi, What is a good interpretation of electric permittivity? If you look at Coulomb's law, it seems that the...
Jul10-09 10:57 AM
rockyshephear
3 11,744
I was a bit surprised to find that the average recorded atmospheric pressures at such locations as Mexico City (2.2 km...
Jul9-09 11:19 AM
Bob S
24 15,413
There are situations when a water drop falls on a really hot metal surface and, instead of evaporating, it kinda...
Jul9-09 08:22 AM
Edi
2 2,131
Hi There Can some one please help me find a table or chart that has accurate data for water pressures and...
Jul9-09 07:42 AM
Paul245
1 4,957
I have a few extremely simple questions about thermodynamics... I'm trying to self study it, but a few things just...
Jul9-09 05:30 AM
jmb
5 1,056
I am working on a research project in which i need to create a uniform electric field inside of a tube. I am using a...
Jul9-09 05:25 AM
qais97
2 5,338
Consider a case where 2 people are in a car driving in a straight line at sufficient speed. At some point the driver...
Jul9-09 05:20 AM
vin300
8 1,373
How do you calculate amount of power needed to slowly rotate shaft under bending moment? This is not related to...
Jul8-09 11:59 PM
vin300
1 2,464
If you have a certain number of particles such as a few electrons and protons in an area, how would you determine the...
Jul8-09 11:09 PM
dE_logics
2 588
Hi! I'm interested on how a 45-gallon drum (filled with air) behaves when submerged in water. I did some...
Jul8-09 10:38 PM
hodderman
9 4,812
Can anyone help explain how to convert velocities to different co ordinate systems? I've always been shocking at...
Jul8-09 10:33 PM
DaleSpam
8 11,139
Tell me what makes electron have a charge , what is that property of electron due to which there is attraction...
Jul8-09 04:30 PM
mathman
5 697
Hi all. Could anybody please advise me some good books on Thermodynamics to begin with? My current level of Physics...
Jul8-09 03:25 PM
Pinu7
1 1,062
Does anyone know how to derive the following: \nabla x \vec{V} = -k...
Jul8-09 02:39 PM
jeff1evesque
0 551
Consider a toroidal solenoid powered by a sinusoidal voltage. This will lead to appearance of sourceless electric...
Jul8-09 09:12 AM
ZapperZ
6 1,035
My specialization is Mechanical engineering. So I'm dumb to many of the electromagnetic concepts. But right now, I...
Jul8-09 08:11 AM
Andy Resnick
9 2,352
is there any one who wants to chat about it ? iv tried once here and got not 1 reply, not even the YOU HAVE DONE IT...
Jul8-09 07:39 AM
Dadface
1 669

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