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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 47,912
In my experience, a heavier sled rider always goes faster than a lighter one (given the same sled design). When...
Nov3-12 06:54 PM
Jespermj
15 1,914
Hi there. I'm trying to consider a system in which you have an electric field applied by a capacitor over two media,...
Nov3-12 05:54 PM
DrZoidberg
2 607
The title is pretty self-explanatory. I know the speed of the falling magnet is much slower in a copper pipe, but...
Nov3-12 12:52 PM
FeynmanIsCool
6 1,799
As i understand it, the Maxwell equations in potential form (in the Lorenz gauge) are basically 4 independent wave...
Nov3-12 11:21 AM
waveandmatter
5 975
How could I calculate the analytical form of all the normal modes of a triangular membrane?, asuming the membrane is...
Nov3-12 10:55 AM
Jhovannoty
0 529
Hey guys, I'm new to this forum so I'm sorry if I posted in the wrong thread. So we did these experiments with van de...
Nov3-12 08:38 AM
AJ Bentley
1 480
Okay there is a particular equation in my book, which I just can't seem to understand intuitively. I've been staring...
Nov2-12 11:46 PM
pabloenigma
1 646
I am reading Jackson's electrodynamics book. When I went through the Legendre polynomial, I have a question. In the...
Nov2-12 09:00 PM
Meir Achuz
2 2,160
Hello, does anyone know how to determine the PSF (point spread function) of an optical system? It would be ok also...
Nov2-12 02:48 PM
mnb96
0 561
Two permanent magnets are on the table some distance apart and having some arbitrary orientation relative to each...
Nov2-12 11:53 AM
tris_d
12 1,399
Basically I would like to know how to expand: \left\langle(N - \left\langle N \right\rangle)2\right\rangle <(N -...
Nov2-12 11:15 AM
mfb
6 841
Suppose we have a rod standing vertically and then slightly disturbed so it begins to fall. After it falls through...
Nov2-12 06:27 AM
tiny-tim
7 1,579
Hello friends... Please answer to this question… Lowest possible temperature is -2730C. Why?
Nov1-12 07:17 PM
Rap
14 1,820
Suppose we consider a car moving on rough road in forward direction, wheels rotating clockwise. Since wheels rotate...
Nov1-12 06:38 PM
sophiecentaur
5 1,228
Hi I am doing a project on folded waveguides and I am reading some IEEE papers for literature review. I always...
Nov1-12 12:12 PM
shpongle
2 607
I am trying to self learn kinematics , but i don't understand a certain concept :- If a string hold a mass...
Nov1-12 10:12 AM
arildno
1 979
Can we define specific heat capacity for an adiabatic process ?? Would it always be zero since dQ is 0 for an...
Nov1-12 12:49 AM
Andrew Mason
2 2,471
Hi, I am having some difficulty doing the integral ∫d^{3}v1d^{3}v2 | \overline{v1}-\overline{v2}|, where...
Oct31-12 11:11 PM
babylonia
4 666
So I have derived a formula for the range of projectile in a vacuum fired from an arbitrary height h from above the...
Oct31-12 08:29 PM
FallenLeibniz
3 752
I have an incline A that is very steep reaching a vertical height of h and another one B which is less steep with the...
Oct31-12 07:32 PM
haruspex
5 1,366
I would like to calculate the energy need for move in the black volume in gas (move in from r2 to r1), when gas is...
Oct31-12 05:34 PM
lba
15 2,755
I recently read about the communication blackout during a spacecraft re-entry.. The reason given was the high density...
Oct31-12 10:02 AM
AJ Bentley
1 803
Hi everyone. I am a programmer and I think some basic physics will help me to achieve something I wanted to do. ...
Oct31-12 07:50 AM
cubud
5 1,083
If we try to treat a non-relativistic point charge, what force do we need to accelerate it uniformly, when we take the...
Oct31-12 07:09 AM
blgeo
5 1,161
If 3 spheres have equal masses and the stationary object is in a collision with a sphere with linear momentum . p=...
Oct31-12 06:15 AM
mikeph
6 995
I don't really understand how electromagnetic waves in wires are created. Sure you can see from the Maxwell equations...
Oct31-12 03:08 AM
Q-reeus
43 3,227
It is written that: Another useful form of the equation of state of a real gas is: Pv= A + B/v + C/v^{2} + ... ...
Oct30-12 04:25 PM
M. next
3 779
http://en.wikipedia.org/wiki/Lorenz_gauge_condition I know it's used to simplify the 2 partial differential...
Oct30-12 03:57 PM
dextercioby
7 2,401
Hi there, I would like to know that if we have an leaning object supported by another object, both are supported by...
Oct30-12 03:24 PM
tiny-tim
1 1,474
Classically a single particle will have 3 position coordinates and 3 momentum coordinates, and so it "exists" in a...
Oct30-12 12:07 PM
Silversonic
2 741
When a plane wave for example is travelling from air-->dielectric and we know the power flow of the incident and...
Oct30-12 10:39 AM
xnoiz
0 460
From what I have read so far, the vapor pressure of a liquid is temperature dependent while it is independent of the...
Oct30-12 08:24 AM
mfb
1 964
In case of a circularly polarized wave, is the poynting vector also circularly polarized? If not what happens in...
Oct30-12 08:17 AM
Q-reeus
2 807
As a way to express the complex poynting is F = P + j2ω(Wm − We), whats the magnitude and the phase of it based on the...
Oct29-12 08:27 PM
xnoiz
0 441
NVM, Wrong section.
Oct29-12 11:49 AM
Torald
0 481
Please see the attached photo. I am not sure how to proceed. I do not know Mi or M2, nor do I have enough...
Oct29-12 09:09 AM
emKhairol
3 1,190
I love physics, but I find that I am ignorant about some of the more basic concepts, so forgive me if this question...
Oct29-12 08:53 AM
jtbell
4 968
Hello, I am having difficulty understanding the paragraph in my textbook explaining why no other engine can be more...
Oct29-12 08:36 AM
jtbell
2 991
hi .. ... i am entering a sumobot competition..weight limitation 1kg..dimensions 150mm*150mm...what is more important...
Oct29-12 04:00 AM
rcgldr
4 685
Not sure if I am doing this correct and do not have answer available... A heat pump takes on 30,000BTU/hr of heat and...
Oct28-12 11:41 PM
Andrew Mason
1 1,005

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