# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Views: 544 Announcement: End of year contest, $75+$50 prize! Dec18-13 Meta Thread / Thread Starter Last Post Replies Views Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people... Apr22-11 06:26 AM ZapperZ 1 40,032 Hello, I just want to make sure I am doing this right. As an example, if I want to add a spoiler or hood scoop to a... Oct29-13 12:28 PM CWatters 4 363 I have a problem in finding the heat transfer coefficient of a heat exchanger in which Ethane undergoes a phase... Oct29-13 11:43 AM Chestermiller 6 309 Can anyone explain this case ? If a moving box is pulling with a force F and the kinetic friction is 0.4F, of course,... Oct29-13 10:57 AM dauto 2 403 If a car is turning towards right, at which tyres more force will act i.e. left-side tyres or right-side tyres...?? Oct29-13 08:36 AM ZapperZ 6 438 i have some troubles to understand the lamor precession properly and i need your help to correct my errors: so in... Oct29-13 01:56 AM anorred 2 1,267 Hello! My first post at Physics Forums! Nice to meet you! In an electromagnet, where the coil windings are... Oct28-13 08:11 PM mrspeedybob 3 319 How can we define negative work to be? I can't get my head around negative work or energy. However, I'm thinking that... Oct28-13 05:29 PM Doc Al 10 491 How does friction work between two objects that are both accelerating at different accelerations? Oct28-13 04:11 PM BaneOfGodot 2 205 Okay, so I'm at conundrum with my physics text book and I cannot seem to understand a few concepts. Allow me to... Oct28-13 08:24 AM PhysicsKid0123 6 621 say you have spherical metal conductor with a cavity with a positive charge inside, the field inside the cavity isn't... Oct28-13 04:14 AM mathnerd15 8 429 Hi, I am having difficulty determining where the electric field comes from when an electromagnetic wave is emitted by... Oct27-13 09:06 PM Drakkith 1 318 Hi, I know that the drag force on an object: Fd= 1/2 . ρ . v^2 . Cd . A where A is the reference area. But... Oct27-13 06:13 PM dauto 2 254 Greetings, On page 7 of Landau and Lifschitz Vol. 1 3rd. Ed, it says L(v'^2)=L(v^2+2\bf{v}\cdot\bf{ε}+\bf{ε}^2).... Oct27-13 06:10 PM dauto 1 243 I came across this experiment where two flowing streams of water, each falling through a can/inductor and finally... Oct27-13 03:43 AM Bobbywhy 6 417 Oct27-13 03:21 AM greendog77 10 482 Greetings, I learned E&M from Griffiths, and for the most part I understood everything - I am very comfortable... Oct26-13 07:49 PM cabraham 19 829 Hello, I need help to calculate the lenght of pipe in copper (d=22mm) to get the water in "kolam" to be 45 degree... Oct26-13 06:39 PM CWatters 1 308 Hi, I just need to ventilate and see your opinions. Charge can be partitioned into groups of particles of one or... Oct26-13 05:29 PM DaleSpam 11 637 Hi forum I need to explain the following to pupils of about 17 years of age. 2 questions regarding free electron... Oct26-13 04:25 PM cubozoan 6 459 I am a high school student.. I have come across so many times that lower energy state of matter is more stable than... Oct26-13 02:27 PM dauto 5 517 What is the difference between a short bar magnet and a long bar magnet ? How is the magnetic field passing through... Oct26-13 01:49 PM kira506 6 297 Hi, was it Newton the first to describe the gravitation formula?, did he do that in his Principia? and, most of all... Oct26-13 04:50 AM Nugatory 53 1,760 Hi I'm a first year Physics Undergrad and I never quite got satisfied with the answer to this question: "Why... Oct26-13 03:20 AM Oldfart 13 840 This one's aimed primarily at the programmers in this forum. I've written a programme in python (Set as a long term... Oct25-13 05:15 PM JizzaDaMan 6 434 Hello everybody :) I'm doing some electromagnetic exercises, but I got stuck in calculating the polarization of a... Oct25-13 03:11 PM dauto 2 266 Why the steering wheel comes back to its main position automatically to some extent after the car has been turned...?? Oct25-13 06:42 AM OCR 3 278 Hi, I'm sorry and hope this forum allows people who don't study but are interested in physics to post their primitive... Oct25-13 05:38 AM hilbert2 5 486 One mass, two springs If you have a mass attached to a spring which is attached to another spring which both have... Oct25-13 04:38 AM Nugatory 3 452 In my E&M class yesterday, in going over an example for the Biot-Savart law, I couldn't quite understand the initial... Oct25-13 04:33 AM mikeph 3 418 http://m.youtube.com/watch?v=8X1x9RLaaxc he tells number of contraints (he write no of pairs ) is nC2 how is it, i... Oct25-13 03:07 AM DrClaude 7 465 i'm trying to relate the helmholtz and the gibbs free energy together. I thought that since the gibbs was just the... Oct24-13 10:03 PM iScience 2 313 Fractals are just many iterations of a very basic formula, so they can be described with little information, and yet... Oct24-13 09:43 PM meBigGuy 7 292 I'm designing an eyepiece for fun and want to be accurate. I just realized my physics book equations are approximated... Oct24-13 07:28 PM UltrafastPED 7 326 What basic types of stable orbits are there for sets of objects of equal mass? For example, with one object it... Oct24-13 07:12 PM Jano L. 1 392 Hi, Does it make a difference if you use nitrogen gas or oxygen gas or hydrogen gas in the bulb ? Or they all give... Oct24-13 04:24 PM Philip Wood 2 336 Hello, i'm doing my prep for my lab experiment tomorrow and have a few questions about the experiment. The... Oct24-13 04:19 PM BOAS 2 349 I was little confused about taking inertial forces into significance while calculating piston effort in a piston crank... Oct24-13 04:18 PM Lewbish 5 4,800 What is the criteria in choosing infinity as zero potential ? e.g. an infinite plate with uniform charge density. ... Oct24-13 01:09 PM rude man 8 378 Can anyone give me an intuitive/physical reason for why the divergence of the curl of a vector field is always zero? I... Oct24-13 10:43 AM arildno 11 508 I read on 27 chapter from Blundell's Thermal Physics 2nd edition. For ideal gases, Joule expansion doesn't cool... Oct24-13 04:25 AM rude man 4 327