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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
1 47,892
In ch 30-7 of the Lectures, Feynman explains that the field of a plane of oscillating charges at a point P is...
Nov8-12 07:46 AM
0 648
I am having trouble pinning down why the relative permeability of a transformer core will not directly affect the...
Nov8-12 03:22 AM
2 893
Hi I've built a NST 15kV tesla coil and I hooked it up today and it kinda didn't work. I'm wondering if anyone...
Nov8-12 01:07 AM
4 947
In a PVT system, knowing the function U(S,V) (or S(U,V) ) allows us to know all the information about the system, so...
Nov7-12 11:31 PM
14 1,807
Consider the classic image problem with a conducting plane and a point charge. After finding out the charge density on...
Nov7-12 04:03 PM
Meir Achuz
3 1,512
Using a 30kg cubic block Ice at -20degC, I want to cool down a piece of steel which is resting on the seabed. The mass...
Nov7-12 03:47 PM
2 695
Hi, studying for exam and checking if i am doing this question correctly , Q: Cylinder radius R=1m length L=2m...
Nov7-12 08:19 AM
2 674
Here's an interesting puzzle: The whole scenario takes place in one dimension of space. Ball B is at rest. Ball...
Nov7-12 08:09 AM
3 798
When the electromagnetic wave propagates in air and it meets the object with the size less than the wavelength then...
Nov7-12 07:32 AM
Andy Resnick
9 910
If I have a wave that looks pretty much sinusoidal but the peak positive amplitide is greater than the peak negative...
Nov7-12 07:28 AM
Philip Wood
2 753
Hello everybody! There is interest in making point-like light sources, especially to measure the quality of optics,...
Nov7-12 06:33 AM
5 583
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
4 1,202
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
1 632
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
5 7,645
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
4 1,635
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 1,035
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
4 1,028
Imagine two cylinders in which one cylinder in within another.(Please refer attachment) The annular space between...
Nov6-12 10:21 AM
2 942
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
1 888
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
5 910
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
44 2,528
Imagine an electric field created by a electricity running through a looped wire. Leaving all other variables exactly...
Nov5-12 07:44 PM
1 689
is it possible to harness the lightening to get electricity.
Nov5-12 07:41 PM
5 695
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
1 527
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
2 942
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
1 696
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
23 1,592
Somebody slept through their lecture on resonance. I don't know how to link video. ...
Nov5-12 03:03 AM
1 649
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
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
4 1,160
1. Can you tell me the name of two particles having zero force of gravitation between them ?
Nov4-12 01:49 PM
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
18 2,451
Hi. Imagine an imaginary car with a huge windmill on top connected to its enginator. Assume windmills and enginator...
Nov4-12 01:42 PM
13 1,019
I am reading the book of Neuenschwander about Noether's Theorem. He explains the Euler-Lagrange equations by starting...
Nov4-12 10:44 AM
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
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 1,301
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
25 2,494
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
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
2 607

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