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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 46,835
Why do we not consider quantum effects when we deal with motion of electrons in a Cathode Ray Oscilloscope, or in a...
Aug10-09 07:14 AM
manofphysics
2 626
It's evident that ampere's law is used to calculate the magnetic field produced by flowing charges. Can I use Gauss's...
Aug10-09 07:05 AM
maverick280857
10 2,624
The thread title is meant to be "Can a fly lift a balloon", it's Tom now due to a small mistake while posting. This...
Aug10-09 05:09 AM
I_am_learning
7 649
If I'm in one of those carnival rides that spin fast I can feel the centrifugal force. This is due to the radial...
Aug10-09 03:31 AM
A.T.
19 2,679
Hi, When a circular section object (cylinder, sphere of radius r) rolls down an inclined plane (at angle theta) it...
Aug10-09 03:20 AM
rcgldr
14 19,255
newbie question, say i'm rolling a ball down a smooth , differentiable, and frictionless 1-Dimensional hill V(x) from...
Aug9-09 06:37 PM
bm0p700f
6 4,294
Hello ! Is there an expression for the friction force exerted on a solid sphere rolling (or rolling and slipping) on...
Aug9-09 06:17 PM
bm0p700f
14 5,050
Q1. A thermometer is laid out in direct sunlight. Does it measure the temperature of the air, or of the sun, or of...
Aug9-09 01:29 PM
dx
15 4,265
anyone have equations for bitter magnets? or do i use the ones for solenoids? i need an electromagnet capable of...
Aug9-09 05:20 AM
microfracture
7 3,856
Hello, all! I am currently working with the governing equation of a rotating, translating rigid body. That is: ...
Aug9-09 12:54 AM
Arrowstar
0 794
I've been reading through the Feynman lectures (almost done with Volume 1), and I have been trying to prove everything...
Aug8-09 12:44 PM
Bob S
3 1,708
Hi, I have some questions about the derivation of the Boltzmann distribution, for instance as in Mandl's "statistical...
Aug8-09 10:49 AM
haushofer
6 1,437
if a body that is going in space in a straight line and suddenly 2 forces acts on it the first with the motion...
Aug8-09 12:38 AM
rcgldr
20 1,582
I wanna know whether this analysis in the image is correct or no ,and if no pleas I want u to explain me the reason...
Aug7-09 08:38 PM
Doc Al
4 751
Hi I'm looking for a place were I can find the damping coefficient for water. Maybe someone has/can find/knows a...
Aug7-09 02:55 PM
nasu
5 14,055
Recently I was asked whether the concept of a statistical ensemble is actually realistic and I recognized that I can...
Aug6-09 07:34 PM
Mapes
1 690
So, the rocket equation is F_ext = m(dv/dt) + u(dm/dt) where m is the mass of the rocket, v the velocity, u the...
Aug6-09 02:03 PM
Nabeshin
1 1,707
Hi, I want to electrically heat a uniform block of a known material to a high temperature (about 2000 K). I want to...
Aug6-09 05:59 AM
phyzzy_physh
4 918
It is said that if a force depends only on distance (And not on time), the equations that involve those forces are...
Aug6-09 05:26 AM
Jano L.
1 955
I am looking for a relation between electromagnet (or permanent magnet) and frequency.For example what is the...
Aug6-09 03:27 AM
vin300
3 834
Hi friends, long time ago I noticed the following interesting similarity between classical mechanics and...
Aug5-09 03:53 PM
Jano L.
0 873
Suppose you're driving along a straight, smooth, level stretch of highway with a constant velocity v. There is a cup...
Aug5-09 02:46 PM
jpreed
1 626
i am so confused.. does anybody know a good source to learn physics? every single source (book, website, etc.) says...
Aug5-09 02:25 PM
Mad_Eye
10 1,975
Hello, I got another inquiry about work. Supposing an external agent gives potential energy to an object by pulling it...
Aug5-09 12:19 PM
rcgldr
8 816
Why is the normal reaction to a rolling object shown to the side of the CM? Forces must be equal and opposite Is...
Aug5-09 12:05 PM
rcgldr
6 1,065
I understand that light propagates as a transverse wave -- does this mean that the momentum carried by a photon is...
Aug5-09 11:28 AM
Bob S
2 1,126
I'm new to these equations but let's see if I have the talk down. 1. The electric field surrounding a charge will...
Aug5-09 10:57 AM
Born2bwire
18 1,575
Can a generic, not necessarily harmonic, signal of time be represented as a complex signal with a real and imaginary...
Aug4-09 11:50 AM
jasonRF
4 3,133
Suppose some vehicle with mass m is moving down a hill with angle \theta . Say that the vehicle is exerting a...
Aug4-09 10:27 AM
sganesh88
20 3,870
What is the actual definition of the TM mode? A typical definition that I've come across is that there is no Magnetic...
Aug3-09 10:15 PM
Born2bwire
2 2,356
I've been thinking about this problem today. I tried reasoning my way through it and I haven't been able to. I might...
Aug3-09 05:45 PM
J Goodrich
2 580
can circular magnetic fields accelerate charged particles linearly? is their any method to make a powerful circular...
Aug3-09 05:43 PM
Bob S
22 2,489
Recently, there was a thread on Reddit titled "The year is 2035. We have a permanent base on the moon and have sent...
Aug3-09 01:48 PM
ZapperZ
14 1,297
I understand the the specific heat capacity of a material is a function of temperature. Does anyone know of either...
Aug3-09 07:51 AM
lalbatros
2 1,055
how to calculate the amount of voltage, current and power that two junctions can produce with seebeck effect when the...
Aug3-09 06:54 AM
aravindnaga
0 1,009
Hi, I have been trying to model the temperature distribution along the length of a fin. With a constant 'h',...
Aug2-09 09:41 PM
Karthiksrao
2 654
Hello, this is my first post, i hope somebody can help me. I have searched for the answer myself all over on the web...
Aug2-09 08:54 PM
Q_Goest
5 4,347
hi all, i think this should be simple but i just cant figuring it out i basically want to move a particle at...
Aug2-09 05:51 PM
rcgldr
8 1,394
Hello, I've been going over work and energy transfer for some upcoming tests, and I got the following question: ...
Aug2-09 07:29 AM
Perrin
2 560
If you have just one point charge of 1 Coulomb in the entire universe, and you look at the magnetic field at a foot...
Aug1-09 12:11 AM
rockyshephear
15 1,120

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