# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 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 39,812 The standard book used in our university proves the Kirchoff's law of radiation in an elaborate manner...I understand... Jun11-07 12:07 PM neelakash 0 1,602 Noise cancellation through interference; I guess most people here know what I am talking about. My question is:... Jun11-07 02:36 AM Jallu 13 2,372 i heard that a faraday cage is often used in shielding e.g. sensitive electrical equipment. I was just wondering,... Jun10-07 12:17 PM Jack111 14 3,348 I was just reading through stuff about Newtonian gravitation and this question popped up in my head and I can't answer... Jun10-07 08:35 AM pervect 9 1,272 Hello everyone. I'm reading Goldstein's Classical Mechanics (2nd Ed) and I have worked out the derivation of... Jun10-07 03:50 AM maverick280857 4 4,228 Is there any unconventional method to find out the relation between group velocity and phase velocity? know there is a... Jun9-07 06:28 PM Meir Achuz 3 12,911 I heard that two flat conducting parallel plates have the property that electric field at any point between them, is... Jun9-07 01:08 PM smallphi 4 1,302 i only joined this site to post this thing... now today at school (im in gr 10 by the way) a gym teacher came up to me... Jun8-07 09:06 PM cesiumfrog 2 3,146 A little bit of confusion: Is it not correct to write ▼. E=ρ/ε0 inside a dielectric body. As far as I know we... Jun8-07 11:53 AM ZapperZ 5 845 we know that $\Delta U$ $=$ $\Delta K_{cm}$ $+$ $\Delta I$ where $\Delta K_{cm}$ is the kinetic energy from cm frame... Jun8-07 06:18 AM pardesi 10 1,832 I cant seem to demonstrate that in anisotropic materials the permittivity matrix is symmetric, apparently this is done... Jun7-07 04:47 PM Meir Achuz 1 2,041 Well I was just looking out in the sky one thundering night and was just wondering whar is the cause of the flashy... Jun7-07 09:35 AM DaveC426913 2 1,492 G'day, I was just wondering what the difference was between a Maxwell(M) distribution and a Maxwell-Boltzmann(MB)... Jun7-07 04:33 AM Astronuc 1 5,965 Without an atmosphere, the earth's average surface temperature would be -18 C. The moon's surface temperature... Jun5-07 11:37 PM tony873004 9 5,661 Firstly, this isn't my homework question. I was trying to answer another, broader question for a student, and it... Jun5-07 07:40 PM Worzo 3 1,841 Does a hydrogen baloon ascend faster than a helium baloon? Ignoring the weight of the baloon fabric, and ignoring... Jun5-07 04:04 PM rcgldr 4 2,797 im thinking of the classic airplane problem. the one where the flying airplane develops a voltage across its wingspan.... Jun5-07 09:06 AM ice109 1 1,154 Hello, First time post here, so if I violate some rules of protocol etc. please forgive and let me know! Anyway,... Jun5-07 07:49 AM nickmacias 2 1,476 The Maxwell's relation in electromagnetic theory states that refractive index is equal to the square root over the... Jun5-07 01:59 AM lalbatros 4 1,788 http://www.youtube.com/watch?v=KgKxsX5XZNc a baseball is fired out of the back of a truck going 60mph at 60mph Jun5-07 01:46 AM rcgldr 1 4,239 So from what I understand, right handed circularly polarized light has angular momentum +1, left handed circularly... Jun4-07 09:26 PM Claude Bile 22 2,817 I need to turn this Lagrangian in one that is not explicitly dependent on time. L = \frac{\alpha}{2} (q^\prime +... Jun4-07 07:20 PM Mentz114 1 1,596 I've heard of non-Newtonian liquids (and seen them on tv for entertainment value). I also hear that they keep refering... Jun4-07 11:59 AM siddharth 2 11,383 I guess I do have to ask some questions on magnet storage. Especially over long periods of time. Basically, I want to... Jun3-07 08:34 AM Meir Achuz 1 4,296 How would I calculate the temperature of a theoretical heat-emitting body wrapped in insulation? If the... Jun3-07 05:08 AM tonyjeffs 2 3,740 It is a mechanics discussion regarding a problem of electrostatics. Couple of months ago I dealt with a... Jun2-07 11:09 PM neelakash 8 1,034 hmm just a topic for discussion..im revising for an exam and i found an old paper asking to find rms values of... Jun2-07 08:14 PM ice109 5 1,232 ok so the picture I get in my head is: if I took a wave, and stretched it so that it was a straight line, the phase... Jun2-07 04:06 PM cepheid 10 1,410 There is a model devised by Newton to predict the difference in the height of the tides (as observed from the earth)... Jun2-07 11:48 AM neelakash 2 1,679 When I got a stick with opposite electric charges on both ends ( a macroscopic dipole) and start slowly spinning it, I... Jun1-07 02:10 PM Meir Achuz 2 843 Hello, My girlfriend asked me this question - how far from earth do you have to be before you don't really feel any... Jun1-07 04:57 AM nalA 5 1,916 Our instructor showed us in class that by applying brute force it is possible to give a value to the gravitational... May30-07 08:59 PM cesiumfrog 10 1,537 This kind of belongs to halfbakery.com, but it is down now. (I found on archive.org that) hydraulic pump (like the... May30-07 06:57 PM robhlee 0 1,635 Imagine a solenoid with n turns per length. Now, for an instant, in which everything looks static, the magnetic field... May30-07 05:51 PM Meir Achuz 7 2,264 Hi there and thanks in advance for any help, I have two barrels, one barrel is 1m tall the other is 100m tall. The... May30-07 06:27 AM russ_watters 5 1,044 I was thinking about the eye one time, and the question arose to me of why it is that the eye needs to refocus its... May29-07 12:04 AM q3snt 4 6,475 My teacher conducted an experiment in which he dispersed pop cans into a tub full of water. When he dispersed Pepsi... May28-07 07:25 AM Kurdt 6 3,221 Hello, I want, for obscur reasons which would lead us too far to explain, to split my flow into two component,... May26-07 07:57 PM Heimdall 3 1,641 an object with mass m=0.1kg is thrown with an initial velocity v0=20m/s in a viscous matter that exercises a resistant... May26-07 04:46 PM Doc Al 8 1,158 Hey what if you had a certain volume of hydrogen gas in two different scenarios. They are of equal amounts. In one... May26-07 05:24 AM samski 15 1,546