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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 46,903
I posted this in the College Level Help forum, but no one responded. I really need some explanation on this, so I'm...
Feb16-10 05:12 PM
Seduction
15 2,339
Is it possible to have an INCREASING speed AND have the MAGNITUDE of acceleration decreasing???? If so please give...
Feb16-10 01:34 PM
Bob S
19 3,871
Why is the total energy of an elliptical orbit given by: E_{tot}=\frac{-GMm}{2a} Where a=semi major axis. I agree...
Feb18-10 06:52 PM
shnav34
5 5,912
Does anybody have any tips/ advice on building a simple cyclotron? I read about Michio Kaku making an accelorater when...
Feb17-10 07:45 AM
ephedyn
6 6,796
i am confused about the exact forces in play while we walk and while a car is driven, can anybody plz show me a free...
Feb15-10 11:30 PM
troy611
3 1,977
How does the electromagnetic waves store information, what makes these waves to store. (this may be a stupid question...
Feb17-10 07:17 AM
physixlover
4 1,638
I am trying to calculate the theoretical induced emf of a hand crank generator I am going to make. The generator will...
Feb15-10 09:16 PM
Xyius
1 1,729
I'm wondering if it make much difference if they used silver instead of copper wire in electric generators? Also, how...
Feb18-10 09:25 AM
GRDixon
4 771
What is the explanation behind this law? I've read tons of definitions for it and I still can't understand it. Will...
Feb15-10 08:04 AM
ZapperZ
8 1,383
from the second law of newton we know... applied force is proportional to the change of momentum...that means F= k(...
Feb16-10 01:41 PM
saunderson
2 2,025
Hi, I'm trying to find a way to calculate the resting position of a network of springs that is built as follows: n...
Feb15-10 07:30 PM
o_z
3 3,163
Galileo is said to have reasoned that all masses must fall with the same acceleration despite their differing weights...
Feb17-10 09:23 AM
TurtleMeister
19 5,835
In studying the world, physicists found that, in order to completely understand what today we call "Electromagnetism",...
Feb16-10 12:52 PM
Bob S
14 1,237
Hi All, The classical theory of a bar magnet as I understand it is that there are many current loops at the atomic...
Feb15-10 08:35 PM
Wannabeagenius
2 1,104
hi I have a plate moving back and forth in a closed space. The shape of the plate is a ring, it is moving around an...
Feb16-10 02:39 PM
appelboom
6 1,163
In some papers and text, it is said that the central spot radius of the Bessel beam (take zeroth order J_0(\alpha...
Feb15-10 08:04 PM
KFC
0 2,011
The magnetic field surrounding a bar-magnet (for example) is continuous. The lines that are drawn to depict the...
Feb17-10 01:47 AM
kcdodd
3 2,392
I recall a physics teacher demonstrating an experiment where he transfered a droplet of oil to the surface of water...
Feb17-10 01:37 AM
p.tryon
2 1,019
How far do you need to separate two opposite 1C charges inorder for the potential difference to be 1v?
Feb17-10 02:33 AM
Born2bwire
1 765
Suppose we have an electrically insulated box in a room, and the potential difference between the box and the room is...
Feb16-10 03:56 PM
Stonebridge
3 2,955
according to first law of thermodynamics,q=w for a reversible isothermal process.this means all the energy absorbed is...
Feb18-10 08:24 AM
Mapes
1 693
Hi everyone, I am new to the physics forum. I have been trying to find out relationship between the heat loss by a...
Feb17-10 03:04 PM
bisseychor
0 3,873
I noticed that the relations in mechanics can be seen like: 1) assume conservation of angular momentum 2) from...
Feb17-10 12:35 PM
Gerenuk
0 501
In electrostatic case, Gauss's law can be derived from Columb's law, so we can regard experimental evidence for...
Feb17-10 12:14 PM
kof9595995
2 2,014
My question is seemingly simple. Let us suppose that we had an unbreakable/inflexible rod whose length was 11.8...
Feb18-10 08:11 AM
A.T.
4 1,128
I know for spherical or plane EM wave, there's relation E=cB, and we can prove it by the explicit expression of these...
Feb18-10 01:19 PM
kof9595995
5 7,730
F=ma and w=mg; with acceleration = gravity, then Force = weight. lb is a mass lbf is a force kg is a mass I...
Feb17-10 04:41 PM
D H
13 2,022
Given: a point charge (at rest at the Origin at time t=0) with a constant acceleration in the +x direction. ...
Feb18-10 09:42 AM
GRDixon
1 659
Hi, I am trying to model the magnetic field from two permanent magnets using Matlab, although my particular problem...
Feb17-10 02:19 PM
stephenx_86
0 1,518
I am an ME with my years of heat transfer approx. 20 years back. I have a 3' x 7' insulated sub floor that utilizes an...
Feb17-10 02:44 PM
sdlamb100
1 628
Hi, if the shear stress on an element in a solid is SAy/bI, where S is the shear force and y is the distance from the...
Feb18-10 09:40 AM
milan666
7 3,649
Hi Are the two (attached) circuits equivalent? Also, what if any are the relation between the voltages? (ie....
Feb17-10 05:04 PM
saunderson
1 679
Edit: Apparently Coulomb's law only holds for electrostatics... in that case I understand that this problem is...
Feb17-10 07:12 PM
torquil
1 949
In some books I have seen: \oint \mathbf{E} \cdot d\mathbf{s}=0 Since the Electric Field is meant to be...
Feb17-10 09:32 PM
elect_eng
3 632
Dear Forumers, As a non-English speaker, I am confused about absorbance and absorptance. I found some definitions...
Feb18-10 03:06 AM
Telmerk,the Magician
0 1,754
I was trying to study a way of estimating the capacitance of a capacitor in a kelvin water dropper experiment. Is...
Feb18-10 03:49 AM
Mola
0 2,884
Hi, Would appreciate any help anyone has for me. I am building a physical pendulum of sort, which consists of a...
Feb18-10 06:55 AM
I_am_learning
2 1,977
Hi, I'm making laminar fluid flow devices and want to be able to calculate the velocity as a function of distance...
Feb18-10 07:02 AM
stephenx_86
0 10,672
Edit: Solved.
Feb18-10 08:51 PM
dabananana
2 1,281
A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 5e10 m (inside the...
Feb18-10 07:09 PM
shnav34
2 1,151

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