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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 47,829
Can light travels without electromagnetic field ? Thanks
Jun30-14 12:20 PM
Quarlep
7 1,504
Hi! everyone... I'm a building a standing frame for disabled children, the structure in elemental form is shown in...
Jun30-14 08:11 AM
Harsh188
2 984
I notice on this page at Rice University that regarding Newton's 3rd law it says that... Surely this is a...
Jun30-14 04:49 AM
A.T.
1 698
Hi Let a classical particle with unit mass subjected to a radial potential V and moving in a plane. The...
Jun30-14 04:24 AM
vanhees71
3 760
I really want to know if there is a difference between the force from the first impact of water and the force from...
Jun29-14 08:44 PM
TumblingDice
10 1,547
I am looking for an equation that correlates material failure and collision speed; so that I can better understand...
Jun29-14 07:34 PM
caz
2 776
I have problem undestanding newton's III law. When i press the wall the wall react with the same force on me but as I...
Jun29-14 04:43 PM
ultrauser
42 4,028
Hi - I am currently working on a paper verifying some thermal hydraulic code against experimental test data for...
Jun29-14 03:59 PM
Q_Goest
2 811
I am working through Leonard Susskinds 'the theoretical minimum' and one of the exercises is to show that...
Jun29-14 03:36 PM
WannabeNewton
1 765
If the speed of light is changing, does this mean that the permattivity and/or permeability are dynamically changing...
Jun29-14 09:38 AM
athosanian
6 1,378
Take a closed system of particles. Each has it's own mass, but that's really about it for the sakes of this argument....
Jun27-14 05:51 PM
Jano L.
6 815
Hey everyone, A meager pea brain (me) is in need of some help from you fine physics gentlemen. This is a concept...
Jun27-14 03:24 PM
Volkr16
3 662
As it's stated in Newton's law of gravitation, every object with mass attracts all other object with a force which...
Jun27-14 02:57 PM
Matterwave
12 1,262
One page 5 in Landau & Lifshitz Fluid Mechanics (2nd edition), the authors pose the following problem: The...
Jun27-14 10:57 AM
mSSM
6 788
Recently on an aquarium related forum, I called out someone for making what I considered to be an outlandish claim and...
Jun27-14 09:19 AM
Overflowing
17 3,003
If a blackbody is in equilibrium with the surrounding electromagnetic field, the power emitted by the surface of the...
Jun27-14 04:54 AM
mediray
5 875
Hello, In CFD computation of the Navier-Stokes Equation, is stress tensor assumed to be symmetric? We know that in...
Jun27-14 04:52 AM
vanhees71
2 779
Not really sure where this belongs... But here goes: If you illuminate a photo diode it generates a current because...
Jun26-14 02:05 PM
itaischles
2 728
I'm sorry, I wasn't exactly sure where to put this question but this section is probably my best bet. I'm basically...
Jun26-14 01:59 PM
itaischles
1 682
Hello everyone, I've been having trouble with the following reasoning for a while. The book I use for learning is...
Jun26-14 08:00 AM
jameswhite
5 886
Hi, When we want to solve the Navier-Stokes equations coupled with the conservation of mass for incompressible...
Jun26-14 01:11 AM
Zoli
10 1,004
In feynman's description for the ratchet pawl system he gets the efficiency for the system to be same as he efficiency...
Jun25-14 09:12 PM
Simon Bridge
1 499
Take a hypothetical object with an infinite density (purely so that a particle can get incredibly close to it)....
Jun25-14 04:02 PM
Arnoldas
1 526
Hello everybody, I'm studying classical electrodynamics and I'm having a difficulty grasping the concept of EMF....
Jun25-14 02:46 PM
cabraham
9 700
I can't figure out why the length the a pipe (L) increases the change in driving pressure with respect to this law: ...
Jun25-14 11:49 AM
Philip Wood
4 610
The seawater in deep oceans have a density of 1050 kg/m or so. The density of air is about 1.3 kg/m, about 800...
Jun25-14 10:35 AM
Chestermiller
14 852
Didn't seem to have much luck on the actual reasoning with this elsewhere. A regular pinhole projects an image, and...
Jun25-14 09:59 AM
UltrafastPED
1 428
http://i.imgur.com/wPdNsUI.png In the solution , it says we have dr/dt= -V (polar coordinates) How? i can't see how...
Jun25-14 08:48 AM
Andrax
3 452
We know that the magnitude of tangential component of acceleration is, atangential = dv/dt (where v is speed) So...
Jun25-14 05:08 AM
dean barry
19 1,693
Hello. I know what is diffusion... chemical process when molecules from a material move from an area of high...
Jun24-14 01:28 PM
marcusl
1 454
Hey, currently I am a high school graduate going into college in the fall, but that isn't why I am here. There has...
Jun24-14 11:08 AM
berkeman
5 596
I was thinking the other day and it looks like I need feedback if I am being stupid or crazy. My question is quite...
Jun24-14 10:05 AM
mr.smith
14 744
If heat flow is the momentum change from a faster moving atom or molecule to a slower moving one, and momentum is mass...
Jun24-14 04:42 AM
NicholasB54
2 381
I am attempting to work through a paper that involves some slightly unfamiliar vector calculus, as well as many...
Jun23-14 09:32 PM
Matterwave
1 388
I promise this isn't homework, it's actually for my research :-P Here goes: When two bodies are in contact and...
Jun23-14 09:17 PM
97313
4 516
Can I use Fleming's right hand rule to determine the direction of current when a magnet is moved into a coil(s) of...
Jun23-14 04:46 PM
Philip Wood
10 573
Hi everybody, I'm new at the forum. I've started learning physics on my school last year. I've a question. How...
Jun23-14 11:32 AM
fgp40
6 415
Hello everyone, In order to define the eulerian rate deformation tensor, one should first express...
Jun23-14 04:29 AM
trabo
4 315
Please, tell me really simply from the viewpoint of molecular physics... Why is liquid having a smaller density on...
Jun22-14 03:09 PM
Oomph!
8 349
I am little experience of physics so please be patience with me, This is my first post of this great internet forum. ...
Jun22-14 02:36 PM
UltrafastPED
1 279

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