# 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: 123,908 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 46,982 Sorry if this question has already been considered in this Forum (I'm sure it is but I can't find it now). A rigid... May22-14 07:01 AM Doc Al 31 740 What are cyclic devices exactly? Are heat pumps and refrigerators both examples of cyclic devices? Also is a heat... May21-14 05:35 PM dauto 3 224 My book states: ''An engine is a device that turns heat energy into work'' I know the definitions of both heat... May21-14 04:55 PM dauto 3 228 Could anyone please write the derivation (or forward me to the source of derivation) of the formula related these two... May20-14 06:49 PM UltrafastPED 3 246 Hey guy, this is one of the question in my uni work (I'm not sure whether my answer is correct or not, please have a... May20-14 06:20 PM paisiello2 5 321 I have a short question which I have been discussing with a fellow student and a professor. The question (which is not... May20-14 05:20 AM muscaria 2 233 Hello, as you might have guessed, my question revolves around thin film optics. My intention is: Given a two thin-film... May19-14 10:13 PM Simon Bridge 9 309 Hello! I am not quite sure how do i verify the complex wave function of EM wave \vec{E}(x,y,z,t)=... May19-14 06:09 PM melodyyyylwy 2 216 I was doing a question in Taylor book (example 3.3) where a sticky putty is thrown at a stationary wheel. To solve it... May19-14 04:01 PM D H 3 225 Hi everyone, I am trying to calculate the decrease in magnetic field strength over distance, using a formula I... May19-14 03:46 PM Meir Achuz 4 338 okay so I suck at La-Tex so i'm not going to put the actual equation, but it's not important for my question. In... May19-14 01:29 PM WannabeNewton 1 232 I'm currently reading about thermodynamics and osmosis and I happened to stumble across this paper. There is one thing... May19-14 11:23 AM nossren 7 324 I read this They do not talk about the metal between glass and air! Reflection occurs between glass (low index)... May19-14 10:54 AM naima 2 301 I'm confused why when using cylindrical coordinates three unit vectors are needed. My book says that the three unit... May18-14 08:19 PM Matterwave 1 219 There are two sphere of radius a and b and they are connected by conducting wire. Then why the electric potential... May18-14 01:48 PM berkeman 7 232 This confusion is about the following problem: Suppose the entire region below the plane z=0 is filled with uniform... May18-14 09:59 AM Meir Achuz 5 283 Hi, please could someone explain why the magnetic field is stronger at the poles of a magnet. I know that the field... May17-14 08:50 PM enorbet 3 332 http://www.ilrn.com/ilrn/books/spcp07h/Fig_20_14a.jpg I understand how motional EMF is produced, the magnetic force... May17-14 01:07 PM BruceW 11 335 Hi I'm confused after reading the definitions of physical Quantity and physical property: Definition from... May17-14 11:00 AM dauto 3 373 Hi, I've read that the speed of em waves in the vacuum is the electric field component frac the magnetic field... May17-14 10:25 AM mfb 1 212 Hello all, I would like to know a method to trap light. That is, it should be pretty simple and non-electric. It... May17-14 02:15 AM albertrichardf 12 290 I am trying to make a very strong magnet that will only last for a short pulse, just a fraction of a second, with a... May16-14 10:50 PM Pharrahnox 2 210 When a body is held or rests in equilibrium in contact with a surface (e.g. a slope, the edge of a block etc.) how do... May16-14 05:14 PM jbriggs444 7 237 I am trying to find an equation that tells the strength of a magnetic field a given distance away from the source. It... May16-14 03:04 PM mfb 22 21,480 Hey guys, umm i'm just gonna get straight to the point, why is the notation of dy/dx for example is being abused so... May16-14 10:22 AM D H 22 530 Hi All, I am thinking about building a simple electrical generator, and I am trying to make sure I clearly... May16-14 05:30 AM Pharrahnox 7 456 When water is vigorously shaken the kinetic energy and, hence, the motion of the molecules increase. Which particular... May16-14 03:05 AM Simon Bridge 1 208 To prepare for a future physics course, I googled Newton’s Laws and then found about the Work Energy Theorem. I can... May15-14 07:30 PM russ_watters 56 1,158 Hello everyone, I was wondering, is there any way of calculating the time it takes for two objects in thermal... May15-14 07:10 PM Chestermiller 1 237 Hey guys, I've been wracking my brain for a while, and thus I have landed here yet again. My problem is the... May15-14 12:11 PM crador 3 378 If I have a grounded conducting material, then I know that $\phi=0$ inside this material, no matter what the electric... May15-14 05:42 AM Simon Bridge 3 204 I had a bottle half full of ice and filled it with water and placed it in my fridge. I noticed that the ice was taking... May15-14 04:18 AM DrClaude 1 244 In the semi-classical treatment of the ideal gas, we write the partition function for the system as Z =... May15-14 01:38 AM WannabeNewton 1 242 I'm working on research into the feasibility of separating out the infrared rays above 1200 nm in sunlight for solar... May14-14 10:10 PM SIM77 6 213 A new variational principle is presented in this paper: http://arxiv.org/ftp/arxiv/papers/1112/1112.2286.pdf When... May14-14 02:47 PM rrhd 1 182 To every scalar field s(x,y) there corresponds a 'constant' vector field x = A s(x,y) and y = B s(x,y), where A,B are... May14-14 01:16 PM UltrafastPED 6 200 First, I'm a second year high school physics student so my thinking may be half-baked. I was wondering what motion a... May14-14 12:24 PM Agrasin 2 207 In a beam of unpolarised light, there are thousands of light waves of all polarisations. At a given point along the... May14-14 11:00 AM maline 6 388 Hello Everybody, Span efficiency factor appears in the lifting-line theory of Prandtl describing Lift and vortex... May14-14 04:07 AM A.T. 22 1,912 I have a question that has puzzled me during the last couple of days. Suppose that there is a system (e.g. a small box... May14-14 01:16 AM Jano L. 14 526