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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 47,841
Hi all I'm doing a project for energy efficient buildings with thermal insulation.(Just a leisure project and im...
Nov7-12 06:05 AM
sriram123
4 1,200
I am going to create a model, with two heatsources closely spaced (Cables with a current) Covered with dirt and at a...
Nov7-12 03:34 AM
nicklasaau
1 631
It is ussually thought that if you receive a shock touching only one cable is because you are not well isolated from...
Nov7-12 03:25 AM
rcgldr
5 7,584
For every force exerted by object A on object B, an equal and opposing force is exerted by object B on object A. I...
Nov7-12 02:56 AM
Fredrik
4 1,633
The equation v22 = vo2 + 2aΔy is used to determine the change in position, acceleration, or velocity of a...
Nov7-12 12:46 AM
Simon Bridge
4 1,032
Hello, I am working on a project regarding truss analysis on a plane and I need to find all the forces acting on the...
Nov6-12 02:52 PM
A.T.
4 1,026
Imagine two cylinders in which one cylinder in within another.(Please refer attachment) The annular space between...
Nov6-12 10:21 AM
nasu
2 941
I have a lot of confusion and I hope someone can help me in clearing my doubts. considering a right cylindrical...
Nov6-12 08:53 AM
A.T.
1 884
Hello All, I have some basic damping related questions that I am hoping you all can shed some light on or suggest...
Nov6-12 03:44 AM
K^2
5 908
Hi, A parallel plate capacitor is charged from fixed voltage, after I cut voltage source. Now, what's happened if...
Nov6-12 01:32 AM
Gh778
44 2,524
Imagine an electric field created by a electricity running through a looped wire. Leaving all other variables exactly...
Nov5-12 07:44 PM
Bobbywhy
1 688
is it possible to harness the lightening to get electricity.
Nov5-12 07:41 PM
Bobbywhy
5 694
I was wondering if anyone had any insights on how to estimate or discern the potential drops across a capacitor...
Nov5-12 12:02 PM
Sancor
1 526
An N45 Grade Neodymium Rare Earth magnet has a remnance (Br) of 1320 mT and Coercive force (Hcj) of 923 kA/m. I am...
Nov5-12 11:32 AM
nasu
2 939
i have read an example on electrostatics that if anyone rub a rubber comb and wool , the rubber comb acquires the...
Nov5-12 09:15 AM
Meir Achuz
1 695
1. An object of unit mass moving with unit speed applies unit force to any object when the two collide. True or False?...
Nov5-12 08:32 AM
Chestermiller
23 1,591
Somebody slept through their lecture on resonance. I don't know how to link video. ...
Nov5-12 03:03 AM
A.T.
1 648
Hi I'm trying to balance any 3d system with various fixed weights by selecting the correct lift forces for points of...
Nov4-12 06:39 PM
LordSimpson
4 731
if see a candle light you find the flame moving up.heat moves by conduction, convection ans radiation. a teapot with...
Nov4-12 02:38 PM
russ_watters
4 1,159
1. Can you tell me the name of two particles having zero force of gravitation between them ?
Nov4-12 01:49 PM
mrspeedybob
2 722
Hi, I'm new to this forum. So I do not understand how, in an inelastic system, momentum is conserved. Consider...
Nov4-12 01:45 PM
rcgldr
18 2,447
Hi. Imagine an imaginary car with a huge windmill on top connected to its enginator. Assume windmills and enginator...
Nov4-12 01:42 PM
A.T.
13 1,017
I am reading the book of Neuenschwander about Noether's Theorem. He explains the Euler-Lagrange equations by starting...
Nov4-12 10:44 AM
vanhees71
1 673
Ok,so John Taylor's Classical Mechanics has this small subtopic "energy interactions between 2 particles".And,in...
Nov4-12 09:19 AM
bp_psy
1 741
Hi. Can you clarify for me the equation for g-force below: F= ma + mg I got this equation...
Nov4-12 07:22 AM
AJ Bentley
2 1,295
Hi. I just wanted to know is there any limit to the amount of heat energy that a body can store in itself? For...
Nov4-12 04:43 AM
AJ Bentley
6 833
I believe this is pretty standard. Given a mass m on a spring with spring constant k, a solution to the second...
Nov3-12 11:45 PM
Hetware
25 2,488
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 1,910
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
2 606
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 1,786
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
5 973
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
0 526
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
1 479
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
1 645
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 2,154
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
0 560
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 1,397
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
6 840
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 1,575
Hello friends... Please answer to this question… Lowest possible temperature is -2730C. Why?
Nov1-12 07:17 PM
Rap
14 1,813

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