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- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 41,785
So, I am looking a question about adiabatic expansions and the associated entropy changed. Why exactly is the...
Apr2-08 07:46 AM
Mapes
4 1,015
I was just wondering, since my textbook doesn't really explain it too well, what velocity is part of the equation F =...
Apr2-08 02:16 AM
Feldoh
13 1,991
When dealing with system containing millions of particles( for example, charged particles or magnetic particles) with...
Apr1-08 07:36 PM
pam
1 977
Hi there, I'm working on some experiments regarding to gases. I want to know what'd happen to gas which is uneder...
Apr1-08 04:16 PM
russ_watters
9 2,593
The flux rule states that the emf induced in any loop is given by the rate of change of magnetic flux through that...
Apr1-08 03:00 PM
lugita15
4 2,032
Hi! Can some one give me a link where i can find details about finding the velocity of propagation of a mechanical...
Apr1-08 12:17 PM
Andy Resnick
1 2,263
magnetic field forms closed loop always. So, it should be called a non-conservative force. But if a charged...
Apr1-08 11:41 AM
i_island0
12 2,761
A revolving satellite is similar to a lift which is falling from a height. Only the difference is that the satellite...
Apr1-08 11:23 AM
YellowTaxi
6 1,388
Hi, If I were to bring a magnet (just 1 mm long) close to a hypothetical "magnetic" black hole - something that has...
Mar31-08 03:41 PM
rsr_life
0 1,590
This question came some time back in Stony Brooks exam. I have the solution also. But i am having some conceptual...
Mar31-08 03:02 PM
zarbanx
2 9,432
Hi, When a gas is compressed, its temperature increases. But what is the formula to calculate this rise? Could you...
Mar31-08 02:38 PM
zarbanx
3 15,832
Hi there, I am developing a really cool new product and it somehow relates to pressure's behavior. Since I do not...
Mar31-08 12:26 PM
marcusl
1 955
Hi, I am wondering if anyone here has a way to calculate the surface temperature of an object as it gets hit by a...
Mar31-08 10:57 AM
fair001
9 3,337
Hi, I'm looking at finding a way to determine when a stream of water of a certian diameter coming from a hole at a...
Mar31-08 08:17 AM
Andy Resnick
2 1,726
When I do some physics derivation, I find that on a seesaw, if the object is farther away from the fulcrum, the...
Mar31-08 05:10 AM
Doc Al
5 2,782
As part of my project I want to calculate the theoretical value of the best thickness of cladding to use on my...
Mar30-08 07:45 PM
Claude Bile
15 1,780
if F is any function and H is the hamiltonian, then the Poisson Bracket of F and H, is given by: = dF/dt -...
Mar30-08 04:34 PM
George Jones
2 857
Hi, I'm looking for some help in calculating the amount of force from natural gas exploding. Part of the problem is...
Mar30-08 04:26 PM
Lojzek
1 730
Now suppose we have two conductors A and B. A has a charge of +2 and B has a charge of +8. If we let the two...
Mar30-08 01:56 PM
DaleSpam
5 1,131
I am having a problem with some thermodynamics calculations. I am not very experienced with them and it certainly...
Mar30-08 12:49 PM
lilrex
0 873
Hello I attach a question (PDF-file) which I found in an old physics book, I printed the question and re-generated...
Mar30-08 10:48 AM
Lory73
4 960
Question on Magnetic polarization Is it possible to hear/record the sound created by the shifting of the alignment...
Mar30-08 10:15 AM
Lojzek
1 947
Many of us have seen how to find a vector satisfying the following conditions (i) magnitude is m (ii) makes angles...
Mar30-08 07:26 AM
mr.survive
13 7,768
Well, I think this one is pretty simple, but still, I don't know how to solve it. We all know that for uniform...
Mar30-08 06:58 AM
mr.survive
3 890
It's widely known that the electromagnetic wave equation admits of time-advanced as well as time-retarded solutions,...
Mar29-08 09:32 PM
DaveLush
0 520
I am writing an essay in which I try to describe Centripetal Force to a layperson. Since I am a layperson myself, I...
Mar29-08 07:32 PM
Hootenanny
11 2,441
If F denotes the central force and is given as the inverse of the square distance F=-k/r^2. where k>0. How can i show...
Mar28-08 09:24 PM
Shooting Star
1 921
My professor brought this up in class the other day, but has yet to elaborate on it and i can't stop thinking about...
Mar28-08 01:28 AM
harshant
6 2,572
As I've been studying up on EM radiation, I've come to the conclusion that radio and light waves are not the same...
Mar27-08 03:53 PM
mikelepore
18 16,821
Hi, I was just going over some equations for velocity with respect to bodies revolving around the sun. I wanted to...
Mar27-08 09:56 AM
Anastomosis
4 4,652
Hello to everybody! I would like to find out how valves work but I can`t find detailed information through Google. ...
Mar27-08 09:10 AM
Samwel
8 2,240
An infinite string with linear charge density \lambda is put parallel to the axis of an infinite conducting grounded...
Mar27-08 07:14 AM
pam
3 1,597
Ok, let me try to state this properly (I don't know much about this, so try to understand what I am trying to say...
Mar27-08 03:13 AM
kenewbie
2 946
Let us consider a lift which is moving with a constant acceleration with a man inside. Now we know that the man...
Mar26-08 06:55 PM
DaleSpam
8 4,079
Some examples in text book make me confused when these two works are discussed at the same time. One of the works...
Mar25-08 12:42 PM
variation
4 1,047
Hi, I have some questions about this equation. P + (1/2)mv^2 + mgh = constant. So obviously (1/2)mv^2 is the...
Mar25-08 08:34 AM
optrix
13 2,875
Hi, This is my question: why is in the middle of ice, white ? (have you noticed ?) I guess the reason must be...
Mar25-08 08:00 AM
Andy Resnick
4 1,736
It is often said that Maxwell's equations in differential form hold in special relativity while Maxwell's equations in...
Mar24-08 04:41 PM
elivil
0 1,057
I've been trying to figure out how I can start with the Navier-Stokes equation and end up at the Reynolds Transport...
Mar24-08 07:58 AM
Andy Resnick
2 1,971
I read that charge resides on the outer surface of a charged (electrically) body. Is it meant only for charged...
Mar24-08 12:15 AM
manjuvenamma
7 2,954

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