# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Meta Thread / Thread Starter Last Post Replies Views Views: 77,684 Announcement: Follow us on social media and spread the word about PF! Jan16-12 Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people... Apr22-11 05:26 AM ZapperZ 1 45,661 So what if we have two thick lenses? Thanks in advance , May29-14 06:46 AM UltrafastPED 1 175 Why change of magnetic flux with the time through a coil induces current in it? Please tell me that what happen to... May29-14 05:01 AM siddharth5129 5 268 Hey, I don't if this is the right place to ask ( it is not a homework question but just a curious one about what i... May29-14 03:06 AM siddharth5129 7 252 This question is about push bikes, but could be applied to anything with a versatile engine and a gearing mechanism. ... May29-14 01:39 AM A.T. 3 220 Hello, Im a student and I try to design a valve connected to a tank. However I have some troubles to define the... May28-14 06:53 PM Chestermiller 1 186 Hello, I need some help understanding Bernoulli's principle, flow rate, velocity and pressure. I understand... May28-14 11:27 AM siddharth5129 3 349 Hi I am new to this forum. I am an amateur blacksmith/machinist/all around tinkerer. I took a class with a... May28-14 07:33 AM Nugatory 4 192 When thinking of a spherical shaped particle moving about under Brownian motion, one describes its motion by... May28-14 07:11 AM Steve Drake 2 218 Initially the pings from Malaysian airlines flight MH370 could only determine the distance of the aircraft from the... May27-14 10:39 PM nsaspook 29 1,925 I am going through Mary Boas' "Mathematical Methods in the Physical Sciences 3rd Ed". I finished the chapter 3... May27-14 08:43 PM kq6up 4 234 I was wondering how could I hold a lot of charge inside, for example, a ball. I thought by wrapping it in an isolant... May27-14 08:34 PM UltrafastPED 1 200 Hi, I am trying to resolve a force into xyz components and I think I'm getting a bit confused. When viewed face on... May27-14 07:03 PM LukaD 4 200 I was solving a static electricity/electric field problem and I came across with one saying earth has an electric... May27-14 04:56 PM sophiecentaur 7 383 Hello there, I have a problem that I've been trying to solve for some time now and I find myself struggling. I am... May27-14 03:56 PM mattt 1 145 I am aware that when charged particles accelerate or decelerate, the particle will emit a certain amount of radiation.... May27-14 02:05 PM Prince Rilian 2 181 What is the smallest amount of electricity (volts, amps?) required in order to create a magnet capable of spinning a... May26-14 05:21 PM TheAzn 2 206 Both of these represent waves moving in the $+x$ direction. I have seen both used in Howard Georgi's book on waves and... May26-14 03:51 PM 122520253025 6 320 My question is simple: Why do batteries need electrolytes? Wouldn't the battery need the charge to flow only through... May26-14 02:36 AM DrDu 3 312 Hi, have searched around but can't find what im looking for (probably because im not entirely certain what its called)... May25-14 02:09 PM Jorriss 5 303 I read that Jones matrices can descibe optical devices with polarized light. They are 2 by 2 matrices.A basis can be... May25-14 01:37 PM UltrafastPED 5 265 Hello, I have been self-learning Thermodynamics and I am having a bit of trouble with calculating the work in... May25-14 09:20 AM dauto 4 261 I have tried to search everywhere, but cannot find answer to this: does anyone know if there is a table etc. of what... May25-14 08:46 AM Simon Bridge 1 169 Yeah sure, change in speed of light as it travels from one medium to another. But why does it affect the path? I mean,... May25-14 06:16 AM Manraj singh 17 546 Let's say I have a magnetic ball within a solenoid that has current passing through it. How would I calculate the... May24-14 10:19 PM Integrated 4 213 So I'm not OK with how some people derive this equation. These people consider a pipe whose endings have... May24-14 05:25 PM rcgldr 20 536 how much energy is gained by an electron in a battery? May24-14 04:14 PM jtbell 4 247 I saw an example of a hypothetical EM wave that had constant E and B fields. Is that possible? How would it be... May24-14 09:15 AM vanhees71 11 465 When a wire has current I in a magnetic field B, there is the Lorentz force is it considered a conservative force or... May24-14 09:07 AM vanhees71 30 740 What's a feasible design for a garden ornament that would give the illusion of a butterfly hovering around a flower... May24-14 08:31 AM UltrafastPED 2 203 I need to find the correct voltage to apply to a wire grid in order to repel a plasma of which I know the density... May23-14 07:03 PM UltrafastPED 1 263 Hello everybody ,A friend of mine told me that best way (The most accurate) to do this is grating diffraction... May23-14 07:42 AM UltrafastPED 2 239 I was just wondering how the kinetic energy in, for example, a car undergoing circular motion is constant. We know... May23-14 07:21 AM Doc Al 10 269 Can someone help me see why the partition function is constant under adiabatic changes? S=const. entropy... May23-14 07:20 AM kuecken 0 143 Hello everyone , I googled for it but nothing came up, Where can I find that? Thanks in Advance , May23-14 03:39 AM DrClaude 5 226 Hi! How shall I correctly describe the velocity, as function of time, for an object put in a stream of e.g. water?... May23-14 03:21 AM A.T. 5 312 I've been trying to work out the forces on a car in circular motion around a turn and I'm having trouble understanding... May23-14 12:26 AM Arcani 6 365 My professor, in his handout (picture below), says the following about this diagram : I disagree with him... May22-14 06:17 PM elemis 1 206 I recently have discovered that the thermodynamics term "adiabatic" seem to be used slightly differently in Britain... May22-14 05:42 PM Philip Wood 11 491 Hi everybody ,Why arrangement of colors in higher order of diffraction is different from order 1 , 2 ? Thanks May22-14 02:07 PM jtbell 2 175 I've been wonder something about coriolis force. Well... when we consider motion of projectile on earth, we have to... May22-14 11:53 AM UltrafastPED 2 177