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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 47,793
This is a short conceptual question. If I place a heat sink in a sealed container, and than raise the ambient...
Sep6-10 06:18 PM
Dr Lots-o'watts
4 661
Greetings everyone: I am trying to create a software for estimating temperature for a liquid in a group of tanks...
Apr8-11 03:54 AM
sandeepbwes
0 496
In thermodynamics heat reservoir has a lot deegres of freedom. Can you tell me some examples of that deegres. Thx
Mar19-12 11:35 PM
Andrew Mason
3 772
I was fascinated by the Wired article describing such an elegant engineering solution for remote data collection deep...
Feb28-07 10:48 AM
russ_watters
4 1,534
See here: http://www.physicsforums.com/showthread.php?t=299561 And: ...
Mar14-09 06:18 PM
rcgldr
4 1,076
Living in the city, it seems that some jerk tries to merge right into my car on a daily basis during rush hour (i.e....
Jul14-11 04:59 AM
rcgldr
5 1,879
Hallo everyone, in electrostatic we have a linear realation between E D and P, i do understand that P is related...
May19-10 10:54 AM
Jano L.
15 1,677
This may seem obvious, but please define these for me, in as much details as possible. What does it mean to: ...
Dec24-11 12:45 PM
DaveC426913
16 3,303
Hi I'm trying to define a Newtonian lagrangian in an rotating reference frame (with no potential) Something to...
Oct22-09 12:55 AM
mtak0114
4 4,751
So I read somewhere that if we know u(s,v) i.e. internal energy as a function of entropy and specific volume, we can...
Dec9-13 01:43 PM
Jano L.
7 671
"Induction is a process of increment of charge such that the charge induced equals to the charge difference between...
May8-09 03:58 AM
dE_logics
5 1,751
I am designing an eddy current brake system for use in roller coaster design. I have the flux density required to...
Mar23-11 04:21 PM
os220
2 1,905
Electric field around a charge or system of charges is defined as the force experienced per unit charge. Won't the...
May31-13 05:20 AM
Pushpam Singh
3 600
A block of mass m is resting on a frictionless surface and a push is given to it along the surface. Now because of...
Aug18-05 07:34 AM
HallsofIvy
2 2,321
Hello. I have attached a file containing a detailed question regarding the definition of the electric current. I'll...
Apr22-11 12:47 PM
AS28
2 819
Okay so I feel this is a bit of a weak first post in a forum but I haven't yet found a place for comment that wouldn't...
Nov25-09 06:10 PM
cesiumfrog
3 1,157
We all know that the definition for work is W = ∫F.ds Why can't it be W = ∫s.dF?
Jun8-11 02:23 AM
Studiot
9 2,877
I've been told (since high school I think) that "view angle" in a 2-dimensional plane is approximately (distance to...
Jul29-13 08:03 AM
Andy Resnick
6 1,364
Hello, I have found the following definition in wikipedia: A fluid is defined as a substance that continually...
Nov30-08 01:25 PM
DaleSpam
2 804
0k i know net force on a body is defined as mass times acceleration of the body w.r.t inertial frame, but how do we...
May12-13 02:45 AM
tiny-tim
8 592
Wikipedia defines a quasistatic process as "a thermodynamic process that happens infinitely slowly. However, it is...
Jul2-10 07:29 PM
Gordianus
6 1,331
I have seen a reversible process defined as one in which the system and surroundings are restored to their initial...
Mar30-11 08:06 AM
Andrew Mason
9 1,690
In several text books I've read that treat classical thermodynamics, there is a theorem due to Carnot that is commonly...
Sep5-10 10:13 AM
jojo12345
0 886
In another thread, DH and I have been discussing the definition of an ideal gas. DH, who appears to be a physicist,...
Sep15-13 07:30 PM
Chestermiller
6 822
Does anyone know how to derive the following: \nabla x \vec{V} = -k...
Jul8-09 02:39 PM
jeff1evesque
0 583
This is a very sound stupid question, but I'll go ahead anyway. Current is defined as the displacement of charge...
Apr20-13 03:34 AM
Nikitin
4 646
I am a bit confused about the definition of elastic collision. What i have studied is, elastic collision is one in...
Jan8-11 05:51 AM
kalesony
19 6,898
I'm confused by the definition of electric current. It is commonly defined as the time rate of change of charge...
Apr14-10 01:23 AM
annumarch
4 2,205
Hi, I'm having some difficulty understanding the definition of an electric field. When we define the electric...
Feb29-08 12:40 AM
cepheid
9 2,520
I recently realized that I have never really seen a rigorous definition of the electric polarization field in matter...
Oct17-07 10:46 AM
Meir Achuz
2 14,285
Hello, I just read on "Integrated electronics" by Millman the following definition: "The potential V (volts) of...
Jul4-10 09:23 AM
Taturana
4 3,235
Everyone knows that the potential difference between two points 1 and 2 is given by \int_{1}^{2}{\vec{E}}\cdot...
Dec16-10 11:44 PM
dgOnPhys
7 4,185
What is the definition of entropy of a thermodynamic irreversible process? In the case of reversible process from...
Oct2-13 09:26 AM
Chestermiller
5 1,125
F=\frac{q1q2}{4\pi\epsilon_{0}} If epsilon 0 was defined as the proportionality constant for this equation, why was...
Jun29-10 02:56 AM
AJ Bentley
3 7,140
The total work is the same in all adiabatic processes between any two equilibrium states having the same kinetic and...
Nov19-12 02:15 AM
DrDu
22 1,951
We have been working with Gibbs factors and the grand partition function in my thermodyamics class. There is an...
Mar10-06 02:30 AM
eep
0 2,346
Okay, I'm confused and need someone smarter than me to explain something to me about Kinetic Energy. In studying...
May6-10 07:17 PM
DaleSpam
9 2,522
I'm learning classical mechanics right now, and I have a question about the "initial definition" of the Lagrange...
Mar12-04 12:54 PM
turin
10 17,782
When one finds the torque on a rectangular current loop one finds that it's equal to \vec m \times \vec B where...
Oct6-11 08:32 AM
center o bass
4 1,305
What is the physical meaning of each term in the parallel-axis theorem? I=I com +Mh^2
Nov12-11 09:49 PM
Duane
3 2,335

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