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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 45,480
I notice that sometimes there may be 2 ways of getting to the answer -- using energy, or "forces'. Can I always just...
Jun14-11 10:24 AM
I like Serena
8 1,633
Hello all, I'm currently working on some magnetic shielding, and my supervisor wants me to try and find an...
Jun14-11 06:16 AM
Born2bwire
5 941
I'm a mechanical engineer and I'm really interested in electrical systems. I understand a fair amount about the basics...
Jun14-11 05:52 AM
The_Duck
6 2,143
Hi everyone! I'm new to this forum. I enjoy physics but I'm full of doubts :) Now I'm trying to understand how...
Jun14-11 05:50 AM
luis20
2 1,447
Hey, all. I'm tutoring a freshman, and we've come to this particular problem, and I think there's missing data. He...
Jun14-11 04:41 AM
Metaleer
3 1,490
if we have cylinder full of water on a scale the we heat it, does the scale show any difference in weight of...
Jun14-11 03:00 AM
Lsos
2 999
Can anyone explain the mechanics of a chain hoist and its mechanical advantage, in mathematical terms,??? thank you...
Jun14-11 12:20 AM
JohnMorriss
3 1,644
Hallo, I hope someone can help me with the following question: A submarine conatins 1000m^3 of air and has a...
Jun13-11 08:55 PM
nasu
2 1,480
I'm going into my third undergraduate year and have yet to take a course on thermodynamics and statistical physics,...
Jun13-11 07:53 PM
Pengwuino
3 593
Hello friends .. I did a physics exam last week and had many doubts on questions 1 - d) e) and 2 - b) c) ... I tried...
Jun13-11 07:31 PM
pupiloslash
1 933
Hi everybody. That's my first (of many) post here! I'm a brazilian guy who is trying o solve de Wopho's Problems....
Jun13-11 04:51 PM
nekronaut
3 987
I'm trying to understand how the polarization of an incident laser, (280.5 nm YAG in this case horizontally polarized)...
Jun13-11 03:50 PM
Jimbone
0 474
Hello, I need some help in a matter. I donīt have any great knowledge in thermodynamics. If I have a plate of...
Jun13-11 12:51 PM
ladil
4 1,133
hi all why do many things in physics move in waves ? in fact , if im not mistaken , everything apart from mass...
Jun13-11 11:23 AM
Studiot
37 4,633
What is the proof that the total rate at which radiation is emitted by a black-body radiator is proportional to the...
Jun13-11 11:19 AM
Lakshya
2 872
For my classes I want to prepare this experiment http://fizyczny.net/viewtopic.php?t=28422 But of course I need to...
Jun13-11 10:33 AM
chrisbaird
2 1,420
here is the thing, I have understood this in dielectrics, and I know that we have a new vector field instead of E, the...
Jun13-11 10:09 AM
chrisbaird
1 619
Why do materials like aluminum cut down the value of the B field? Like suppose we had an infinite current carrying...
Jun13-11 07:07 AM
cragar
4 591
I know how photons are diffracted round a corner in quantum mechanics. But is there also an explanation in classical...
Jun13-11 07:06 AM
sophiecentaur
12 1,696
How does lightning cause a voltage spike? Is it the changing magnetic field caused by the lightning current that...
Jun13-11 06:54 AM
sophiecentaur
1 1,765
Hi, I had a question in my exam at my college that I did not quite know how to answer. Why is the study of...
Jun13-11 04:24 AM
Born2bwire
8 1,233
The electric field at a point P pointed by the position vector \vec r \;\hbox {, from a moving point charge pointed...
Jun13-11 03:54 AM
Born2bwire
9 2,028
OK... My question is, if I have so system like square loop... and all the donations be summed up by Bcos(Tetha) or...
Jun13-11 03:04 AM
Born2bwire
3 964
Hello Physics Forums! Longtime lurker, first time poster here. I've got a deceptively simple question that had my...
Jun13-11 01:30 AM
ifnspifn
0 848
Given a set of a scalar function V and a vector function, how does one recognize that it is a coulomb gauge or lorentz...
Jun12-11 09:04 AM
Vanadium 50
4 7,487
my understanding is that energy is wasted in a solar cells when light with more frequency than necessary to make an...
Jun12-11 06:36 AM
thopsy
1 1,291
Could you possibly comment the following statement: 'Heat propagation is a semi-deterministic process in that its...
Jun12-11 06:04 AM
vanhees71
2 656
This is perhaps more a maths question, but it's about a piece of maths that physicists use a lot, and I'm interested...
Jun12-11 05:39 AM
Studiot
21 2,576
I know that all bodies with a temperature above absolute zero radiate energy away as the following. P = AeσT^4 ...
Jun12-11 12:36 AM
Andrew Mason
2 742
Divergence and Curl in cylindrical and spherical co are: \nabla \cdot \vec E \;=\; \frac 1 r \frac {\partial r...
Jun11-11 06:57 PM
RedAnsar
17 4,437
I'm looking at a question in a grade 8 science textbook. It asks what would happen to the buoyancy force if gravity...
Jun11-11 04:12 PM
GRDixon
5 1,782
Is there any printing technology that can print small enough parallel lines on, say a glass or clear plastic...
Jun11-11 12:53 PM
arydberg
4 902
Hello everybody. I have the following problem: I am given a Speed distribution function, f(v). This distribution is...
Jun11-11 09:32 AM
Petr Mugver
4 1,709
Hi. I have a question concerning the magnetic momentum of a current loop. We know that if we have a circular current...
Jun11-11 09:14 AM
Gavo
2 2,706
I almost all movies where you could see an animation about an asteroid, they move in a very distinct way. I don't...
Jun11-11 09:07 AM
zsero
14 5,344
Hi all I am new here!! can anyone tell me how can i rotate the object around it's center of mass and not the origin...
Jun11-11 08:18 AM
mahi.aw
6 1,669
I can show that Coulomb's Law + superposition implies \nabla \cdot \mathcal {E} = \frac{\rho}{\epsilon_0} and \nabla...
Jun11-11 03:47 AM
henry_m
3 826
Hello Forum, the formula for skin depth is both inversely proportional to conductivity and frequency omega. There...
Jun11-11 12:40 AM
Antiphon
3 1,635
This is weird, I have no clue on how to solve the following question that I "invented" while walking in the street due...
Jun10-11 10:56 PM
fluidistic
5 1,361
Hi everyone, just some background information--I work in an emergency department as a trauma tech. My co-workers and I...
Jun10-11 10:31 PM
berkeman
77 8,496

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