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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 47,671
I once came across a Wikipedia page describing a system where indifferent of the initial starting position, at some...
Jun30-11 12:52 PM
chrisbaird
2 1,183
I am getting stuck trying to solve a differential equation describing the gravitational relationship between two...
Jun30-11 07:31 AM
phyzguy
2 1,261
Hey all. I was wondering what the interaction between Electric and Magnetic field lines are. For example, when you...
Jun30-11 03:39 AM
Drakkith
10 4,510
A picture that seems to show up a lot in high school physics is one like this: ...
Jun30-11 03:28 AM
sophiecentaur
66 7,501
Hi all! I tried to make an inductor. Naturally, I am not sure about it's inductance value. I made an LC series...
Jun29-11 11:11 PM
Antiphon
3 2,105
Hello, I am writing to ask about the specifics behind the concept that recurve bows have an arrow velocity advantage...
Jun29-11 04:23 PM
markkrebs
9 32,322
I'm sure this is a rather simple calculation, but I just can't seem to get it right. During a recent lecture a...
Jun29-11 12:38 PM
phyzguy
3 1,773
if a particle of matter and anit-matter collide they are annihilated. Does this violate the laws of thermodynamics?...
Jun29-11 12:16 PM
Ryan_m_b
3 1,994
The following is something that puzzles me a bit, and I'd appreciate some insight in the matter. Thank You :) ...
Jun29-11 11:56 AM
Andy Resnick
1 1,054
For retarded scalar potential of arbigtrary source around origin: V(\vec r, t) = \frac 1 {4\pi\epsilon_0}\int \frac...
Jun29-11 11:53 AM
yungman
3 923
In an
Jun29-11 11:04 AM
timthereaper
1 525
Usually in statistical physics, when your system has a large number N of particles, you take the continuum limit --...
Jun29-11 10:08 AM
drkatzin
4 2,734
Hello. I have some questions about the study of partial coherence with a Fresnel biprism. In common text degree of...
Jun29-11 08:12 AM
Andy Resnick
1 1,642
Why do capacitors charge exponentially? and do not explain by equations.
Jun29-11 07:37 AM
tushar gupta
2 1,147
Where to find an exact formula for brightness temperature caculation? Only Wien's approximation is used everywhere....
Jun29-11 06:39 AM
f95toli
1 2,336
The scenario: I have a bag containing 3L of water, attached to a tube with the end placed on the floor (or a fixed...
Jun29-11 05:05 AM
HallsofIvy
2 2,445
Please teach me this: What is temperature in non-molecule substance(e.g photon,phonon,plasma...and ...
Jun29-11 04:58 AM
Studiot
12 1,456
Hello, I feel like an idiot because I can't answer this myself (I forgot my high school physics). I have a stereo...
Jun28-11 05:57 PM
Studiot
2 744
Why and how does light get brighter as you increase a light bulbs voltage?
Jun28-11 05:22 PM
Drakkith
9 3,211
How can we calculate the flux in a coil which carries a current? I am having trouble determining the field at any...
Jun28-11 02:12 PM
Redbelly98
11 1,348
If all frames of reference are taken as equally valid. when a car moves, to the passengers in the car the world is...
Jun28-11 01:08 PM
chrisbaird
3 1,197
i am new to physics so had a question regarding appearance of objects firstly-why do we see the objects as they...
Jun28-11 10:07 AM
danR
5 1,000
I'm only interested in the 2d representation of this, as I will be applying whatever I learn to a physics engine ...
Jun28-11 02:07 AM
trogdor458
0 804
A Changing Magnetic Field Produces Electricity. Suppose we build a huge coil in space and place a strong magnet in...
Jun28-11 12:19 AM
ARAVIND113122
8 2,354
For retarded scalar potential of arbigtrary source around origin: V(\vec r, t) = \frac 1 {4\pi\epsilon_0}\int \frac...
Jun28-11 12:15 AM
yungman
5 1,318
I'm trying to understand the derivation of the Euler-Lagrange equation from the classical action. This has been my...
Jun27-11 08:42 PM
silmaril89
4 2,248
Hi. Sorry if this looks too beginner-ish question. Lets say we have two objects moving towards each other. One is...
Jun27-11 12:29 PM
chrisbaird
2 1,327
Please use zoom function for better view. http://s3.postimage.org/6kyf2dcdn/Untitled.png ...
Jun27-11 09:03 AM
Polyrhythmic
1 1,294
For instance, if an object moves with a constant velocity on a frictionless surface and hits a spring that makes it go...
Jun27-11 08:23 AM
KingNothing
21 1,664
Example: A conducting sphere X that has an initial charge of +2.0 × 10–8 C and an identical conducting sphere Y that...
Jun27-11 08:00 AM
AceInfinity
8 1,918
If I have an elastic formin a helix which i've turned N times and have a radiu r... it connect two masse m (one of...
Jun27-11 07:35 AM
ardie
2 861
We have a circular non conducting ring placed in a uniform magnetic field with its direction perpendicular to the...
Jun27-11 05:58 AM
DaleSpam
1 1,122
Hello, I was wondering under what conditions does free fall need to comply to in order to take effect? I am pretty...
Jun27-11 02:01 AM
newtant
14 1,686
A friend of mine says they can tell which 2 notes are being played together on a piano keyboard. How can this be if...
Jun27-11 12:06 AM
Born2bwire
39 4,353
Is it possible to transmit an omni-directional light source, through a focused uni-directional light source(like a...
Jun26-11 11:08 PM
fermatsenigma
3 2,008
First off, i'd like to note that this isn't homework, and i've seen other threads in here that deal with...
Jun26-11 08:08 PM
tiny-tim
3 1,652
Hello. I have two string-bob pendulums of identical length and mass suspended on a loosely hanging rope. I set one...
Jun26-11 07:36 PM
Nirgal
8 2,011
For a general dynamic system: dXi/dt = Fi(X1, X2,...,Xn), i=1,...,n, suppose that we can write down a Lyapunov...
Jun26-11 06:23 PM
sunon77
0 1,115
I understand that the simplest tuner you can have is a capacitor and inductor connected in series, and i understand...
Jun26-11 06:22 PM
willem2
1 1,071
Hi everybody, I'm trying to calculate the spontaneous energy of a projectile fired by a rifle, handgun, or a canon....
Jun26-11 05:16 PM
danR
12 7,528

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