# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Views: 276 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 39,994 For some given statistics (e.g. Fermi-Dirac or Bose-Einstein), once we know the average number of particles at state... Apr1-09 06:50 PM KFC 1 597 What happens, and why? (This isn't homework, just curiosity.) To be more precise, what would happen to the... Apr1-09 06:35 PM Creator 1 1,819 Hi, This may ultimately be an opinion question: When thinking about electromagnetic waves semi-classically, how... Apr1-09 06:34 PM Integral 5 754 E.g. A football of mass 1kg is thrown with a speed of 10m/s at an angle of 30 degrees from a horizontal plane. Take... Apr1-09 02:27 PM Georgepowell 6 2,488 I have a long, 24" diameter verticle pipe. There is a flow of gas through this pipe in which pure helium enters at... Apr1-09 01:19 PM Q_Goest 0 567 Hi All, A one dimensional soliton will have the mathematical form f(x - ct) where c is the speed of propagation... Apr1-09 11:36 AM somasimple 0 1,342 Ok so my question is about hot water in a home Lets say that I take a shower a shower and i use 20 gallons of water... Apr1-09 07:54 AM MrDieselT 2 1,066 I had a disturbing thought today and I'm hoping someone can silence it for me. A moving object has a certain amount... Apr1-09 07:51 AM DaleSpam 22 1,865 Anyone know of an E&M textbook that covers plane mirror waveguides in any reasonable detail? Apr1-09 03:22 AM Ben Niehoff 4 948 please can any one give me clearly information about Op Amp Offset Voltage with simple example and rule to... Apr1-09 01:17 AM berkeman 11 1,734 I did not know where else to post this question but put it here since it is more related to mechanics than to... Apr1-09 12:10 AM D H 13 1,153 Hello i need some help.. boiled egg will rotate for long time or unboiled and why?I hope u people will help me... Mar31-09 07:09 PM samar 4 638 I am a high school student with a general interest in physics of all types. We have learned that circular motion... Mar31-09 01:38 PM ajassat 4 1,527 I know that a changing magnetic field creates a changing electric field, which creates a changing magnetic field,... Mar31-09 11:00 AM DaveC426913 2 983 We know that free fall acceleration is independent of mass. 9.8 m/s^2 on the Earth Surface and 1.63 m/s^2 on... Mar31-09 10:55 AM Count Iblis 7 1,142 isnt the field in any given volume always uniquely determined to prove by contradiction assume E1 and E2... Mar31-09 10:26 AM Cantab Morgan 9 961 We are currently learning about conservation of momentum and conservation of energy in my intro physics class @... Mar31-09 12:19 AM hydralisks 3 3,543 Is it possible for magnetic field lines to be broken? Mar30-09 09:06 PM isabelle 1 1,287 Does anyone know of or belong to a physics group in Pittsburgh, PA? Mar30-09 08:30 PM CFDFEAGURU 0 698 I was watching a movie talking about the hydrogen atom and the study of spectrum from hydrogen gas when a question... Mar30-09 07:23 PM Cantab Morgan 4 1,470 I need elastic constants, piezoelectric coefficients & permittivity for different semiconductor alloy? Someone could... Mar30-09 06:30 PM Andy Resnick 2 737 There was a question several days ago related to visualizing the electro-magnetic field. I reminded me of a great... Mar30-09 06:17 PM weichi 0 602 Does anyone knows how to explain (both physics and mathematics) why there's no magnetic mono-pole? Mar30-09 03:15 PM Naty1 8 912 First of all, how do eddy currents works? Second of all, how are they used as brakes? Mar30-09 03:06 PM Naty1 2 1,936 Hey there, firstly i'll just say to start i've not studied general relativity at all, and the answer to my question... Mar29-09 05:03 PM Chewy0087 5 821 Hi, first post, so for a side project for my modern physics class I am making a contraption that would transfer... Mar29-09 03:21 AM manthan33 0 1,120 while facing dissipation systems, some books define the L with L=T+w. is it universal? where is its limits? THX! Mar29-09 12:46 AM enricfemi 5 1,049 Hello, I have found a nice popularisation text on general relativity. It ends with a puzzle that I like very much.... Mar28-09 11:33 PM BillClarkson 8 2,498 I'm reading Landau and Lifgarbagez's Mechanics book and am having a hard time proving the following: On page 53,... Mar28-09 10:56 PM Bob S 1 1,031 http://www.sciencedaily.com/releases/2008/11/081121101003.htm Quote. Until now, scientists assumed that a... Mar28-09 09:37 PM JANm 6 1,569 Hi, I've seen a very very small drop of mercury in a little corner of a laboratory table and it likely dates from a... Mar28-09 04:15 PM lalbatros 5 9,293 Why is it in kinetic theory one uses the velocity variable, instead of the momentum variable? Wouldn't this cause... Mar28-09 11:31 AM Pinu7 4 846 Hi, I'm currently learning about simple fluid mechanics at university and I fall into a problem I couldn't solve but... Mar27-09 10:50 PM fluidistic 4 926 I have a question. For example there are three forces of diff magnitudes and are in three diff directions (not oppo... Mar27-09 08:00 PM makeAwish 5 1,825 Hey, I'm just trying to make sure I understand the concept of hydrostatic equilibrium, so I devised two thought... Mar27-09 02:24 PM Doc Al 1 1,691 Can i ask sth? Why centripetal accel is from an internal force? Usually what type of forces can be considered as... Mar27-09 11:31 AM Bob S 12 1,900 I am reading some material on phase transition. In those, they use order parameter quite a lot, but what is order... Mar27-09 07:14 AM xepma 2 6,250 I have read that when a gas atom or molecule collides with the wall of a container that the collision is completely... Mar27-09 05:50 AM dE_logics 1 1,138 When converting an AC waveform (from polar) to a rectangular form, a source quotes v(t) as x + jy. But how is this... Mar27-09 05:10 AM dE_logics 4 872 How do you take the moments of inertia of a flat body? I know howto take it if it's a 3d body. And the 2d case... Mar27-09 04:23 AM tiny-tim 3 1,260