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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 45,347
I was told that you need a low voltage, high amperage taser to make any damage. I know that touching devices with high...
Aug19-09 02:44 PM
John Creighto
6 21,786
ive been trying to do this question all summer to no joy. ive got a flywheel in motion which then has a torque...
Aug19-09 06:41 AM
tomhitchmough
2 1,214
Quantities, like photons, alpha/beta particles, can travel with a billiard ball like behavior. There are two...
Aug19-09 03:22 AM
John Creighto
0 591
we've been studying te physics involved in bungee jumping. We went to a bungee site, and recorded data, such as length...
Aug19-09 02:32 AM
glugger
10 2,090
1)What is the formal definition of a point charge? It is known, that coulomb's law , is valid for point charges? But...
Aug19-09 02:08 AM
manofphysics
4 1,631
Hi ive been having an argument with a few friends about a theory of mine (based on what i can remember from my physics...
Aug18-09 11:34 PM
sylas
16 5,099
I'm confused by coarse and fine grained entropy and how they're related to the standard Boltzmann and Gibbs equations....
Aug18-09 10:18 PM
SW VandeCarr
1 2,007
This is a physics and math problem The representation of a vector as a straight ray is problematic Imagine an arc of...
Aug18-09 03:07 PM
vin300
1 522
I recently watched the Feynman Messenger Lectures on project tuva. I hope some of you have watched the second video...
Aug18-09 11:27 AM
Pinu7
4 1,533
Dear all, I've found in many books forces acting between 2 parallel wires, but not between a magnetic field and a...
Aug18-09 02:06 AM
fatra2
4 653
Let's say there is flat floor at y=0 . There is a rectangle of which two vertices are at (0,0) and (w,h). There is a...
Aug18-09 01:23 AM
tom_backton
4 761
Yesterday my friend asked me: what will happen if a force F with constant magnitude is applied to one end of a free...
Aug17-09 11:24 PM
kof9595995
5 815
I'm have some conceptual problems with electric fields and waves. When I think of electromagnetic waves I imagine...
Aug17-09 10:39 PM
Born2bwire
7 1,475
My question is a basic one so patience would be appreciated =) Say we have a train moving at velocity "v"...
Aug17-09 09:47 PM
DaleSpam
9 890
I was doing some rotation problems the other day out of my physics textbook when I realized that invariably all the...
Aug17-09 05:45 PM
espen180
2 919
What is the force (horsepower) required turn a 750mm diameter shaft with a mass of 1,000kg, at a velocity of 160 rpms,...
Aug17-09 04:50 PM
Naty1
2 842
Hello all! I just finished the following problem: Consider a thin semi-infinite plate of negligible thickness...
Aug17-09 03:32 PM
ZombieCat
2 3,530
hi all I am trying to use a circuit of NiCr wire to heat a surface. I have setup my circuit using parallel...
Aug17-09 02:13 PM
mgb_phys
1 555
I ran across this question on another site but I didn't understand the answer that was given. The question asked...
Aug17-09 01:08 PM
DaleSpam
21 2,959
Hello everybody! I would like to know if the back pressure in a piezoelectrically actuated displacement pump with...
Aug17-09 03:02 AM
frenchero
0 986
It seems like a simple question, but I get the feeling that there is a catch: You are standing on a plate attached to...
Aug16-09 11:46 PM
russ_watters
46 16,473
I read the paper of Hehl and Obukhov (A gentle introduction to the foundations of classical electrodynamics: The...
Aug16-09 01:29 PM
Ben Niehoff
2 912
A train is moving towards north at one place. it turns towards north east. here we observe that the radius of...
Aug16-09 12:13 PM
lstellyl
1 693
Hi, I have a couple of questions here: 1st, I never really understood how magnetism induces current, like how does...
Aug16-09 01:25 AM
bjacoby
12 4,285
Would it be possible to calculate the time it would take for heat to reach a given temperature between two rubbing...
Aug15-09 06:47 PM
Q_Goest
5 2,959
friends, in lightining conductor, a metal plate with number of spikes is connected to the top end of the conductor...
Aug15-09 06:06 PM
tiny-tim
1 641
This is a somewhat unusual question. I am looking for any physics problem in which the number or factor...
Aug15-09 11:39 AM
Mapes
10 1,755
Hello everyone, I just joined the forum because my friends and I have been having an argument for a couple hours...
Aug15-09 06:48 AM
kuruman
5 747
I know that this site is not for speculation, but can someone help me in this doubt ?:rolleyes: I know that...
Aug14-09 04:51 PM
StephenWeinst
16 4,686
Can someone explain magnets at the subatomic level to me? According to wikipedia, many of the electrons' spins are...
Aug14-09 04:16 PM
kashiark
3 1,151
Is there a consensus on whether or not a co-accelerated observer measures radiation from an accelerated charge?
Aug14-09 02:53 AM
vin300
19 2,202
folks, in my attached image, why can't i take the vector ds as indicated by me in pencil. i am confused. help will...
Aug13-09 11:27 PM
logearav
4 937
How do we apply Wilson eq. to find the activity coefficient. Liquid-phase properties and their correlation, dose it...
Aug13-09 10:24 PM
kritbordin
0 5,176
I'm curious to know how the engineers of NASA determine how to join two moving, or orbiting objects in space. What...
Aug13-09 09:22 PM
mikelepore
10 1,013
My doubt is that when we charge a battery we say that energy is transferred into it , but does the emf of a battery...
Aug13-09 08:21 PM
Redbelly98
6 2,842
Hi All, I'm familiar with this analogy: "The voltage is equivalent to the water pressure, the current is...
Aug13-09 03:58 PM
A.T.
16 3,279
In Feynman's lecture on the principle of least action, he show that you can describe electrostatics by saying that a...
Aug13-09 12:35 PM
nassboy
0 656
\sum^{3N}_{i=1}\frac{p^2_i}{2m}\leq E Why I can write this inequality? Is this E energy of system?
Aug13-09 09:28 AM
Feldoh
3 560
I've just got some small problems this time. The first being,do the particles at the axis of a rotating body really...
Aug13-09 03:00 AM
BobbyBear
115 8,748
I myself am the artistic type, and was unsure where to look for help, so I'm posting here. I'm trying to build a...
Aug12-09 08:42 PM
Nick Walters
22 2,245

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