# 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: 5,291 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 48,243 Hey, I'm doing a research on artificial satellites, and I'm really confused about the escape velocity required for an... Sep13-14 12:04 AM Murtuza Tipu 12 355 http://www.youtube.com/watch?v=ltnLOka-CBo I have been using this skill for a few months now and I feel like it is... Sep12-14 08:59 PM bothan 10 444 So I understand that a black body is a diffuse emitter, and that it radiates energy at a rate of σT^4. I also... Sep12-14 07:44 PM elegysix 1 220 Hi PF community! I'm currently doing a research paper on artificial satellites, and I've made a list of things that... Sep12-14 06:48 PM Crutchlow13 6 217 During summer my swimming pool is 23° C and my loft air is 53° C. (73° F / 127° F) The sun shines on the metal... Sep12-14 06:02 PM Sten Larsen 24 674 Case 1. You have a sphere with Radius R and middle point X with the charge Q. The charge is equally distributed over... Sep12-14 09:48 AM vanhees71 1 158 I'm taking E & M II... Would anyone agree that the following statements are true? An electric field changing in... Sep12-14 06:47 AM Shyan 5 209 Okay guys, I still feel like I don't quite understand these concepts well enough. Do you guys have any websites or... Sep12-14 02:33 AM Nugatory 1 186 Hi! I try to get some intuitive understanding on the equipartition theorem stating that in thermal equilibrium,... Sep12-14 01:55 AM center o bass 2 205 If fan blades move in a circular way how is the air moving towards you (in front of fan) ? Also propeller and fan... Sep12-14 01:52 AM A.T. 5 211 In the attached figure, a de-energizing RL circuit is drawn (left switch is opened while right switch is closed). In... Sep11-14 07:44 PM gsal 1 183 Hello everyone. I've been struggling with how to deal or solve questions that include variable masses. Considering... Sep11-14 04:59 PM Nugatory 6 216 I'm wondering if someone is observing a situation from a frame moving in a uniform circular motion, would that frame... Sep11-14 09:09 AM Nugatory 8 366 Hi, The permanent gases like Nitrogen, Helium etc. have more specific heat capacity as liquid than their gases.... Sep11-14 05:44 AM AbhiNature 0 153 I'm looking for a "simple" calculator, most likely a matrix based thing, to allow me to work out the size of an image... Sep10-14 06:47 PM Andy Resnick 1 137 I do not really understand the big picture of gauss law. For what I know a conductor is a material where electrons can... Sep10-14 05:38 PM TrueColor 2 251 Trying to get my head around some ideas about "rechargeable" batteries and getting in a muddle! So I get the idea... Sep10-14 02:50 PM DeltaČ 4 189 There is a conducting circular loop with resistance R falling in the magnetic field ... Sep10-14 10:43 AM Shyan 4 310 Imagine an electromagnet with two pole faces, one flat (N) and one pointed (S). If you put a diamagnet in between... Sep9-14 09:33 PM Meir Achuz 7 251 Is it possible to generate energy from the earth's rotation? Imagine a Foucault Pendulum attached to a dynamo shaft? ... Sep9-14 06:23 PM jbriggs444 46 1,284 I am trying to derive part of the navier-stokes equations. Consider the following link: ... Sep9-14 06:16 PM DeltaČ 4 213 Hello Is there any way that RH over water in a closed container coud not be 100%? Assuming that the walls of the... Sep9-14 04:08 PM Roger44 7 229 Say I drop a ball of mass 5kg from a height of 2 meters, assuming no air resistance, it will hit the ground with a... Sep9-14 10:58 AM pyman12 5 193 Imagine a beam of light diverging from a source and being incident on a detector. Now imagine a similar set up but... Sep9-14 07:35 AM Dadface 7 278 The classical approximated formula describing frictional force is f = N\mu, directed oppositely to the motion... Sep9-14 04:54 AM A.T. 4 187 Derivation of Helmholtz's energy is $$dF=-pdv-SdT$$ Derivative of Gibbs's energy is $$dG=Vdp-SdT$$ In the... Sep9-14 02:00 AM sweet springs 0 185 Suppose we refine some of terms in thermodynamics based on the follow statements: 1. All energy has two components:... Sep8-14 02:46 PM DaleSpam 2 204 Hello all. I have been searching for information on wave beats in light but haven't been very succesful. I have found... Sep8-14 12:41 PM olivermsun 8 322 Frictional force opposes relative motion and not just motion. Can you please give an example to further explain this... Sep8-14 07:02 AM Philip Wood 5 243 http://i.imgur.com/GP6QorG.jpg I don't follow the integration in it. I'm assuming Fx(x,0) and Fy(1,y) are the... Sep8-14 12:13 AM DeltaČ 1 184 According to my book, and wiki... Sep7-14 04:00 PM Nikitin 6 286 the question is that there is a particle in 3 spatial Euclidean dimensions in cylindrical coordinates. I want to... Sep7-14 12:59 PM noor 2 144 I am trying to calculate heat transfer from an inclined flat plate under free convection conditions. I am referring to... Sep7-14 12:49 PM Libertiene 7 303 Suppose we apply a uniform field to an infinite conducting slab (i.e. like an infinite parallel plate capacitor, but... Sep6-14 07:58 PM Nugatory 2 231 Hi, I'm new here, I was just wondering if anyone could help clarify a subject I'm having difficulties teaching... Sep6-14 07:23 PM Simon Bridge 1 178 Hello, I have a conducting copper ring of inner radius a and outer radius b. point charges Q pass through the centre... Sep6-14 04:23 PM Philip Wood 3 320 Hi All, This is from a classical mechanics problem, and I already 'solved' the problem, but I'm interested in why a... Sep6-14 04:18 PM voko 3 163 The circular loop carrying current experience a tension in external magnetic field.how can this tension be calculated... Sep6-14 04:00 PM Meir Achuz 1 140 Suppose I have a cubic lattice of N^3 masses, M, each connected to six nearest neighbors with springs of constant k... Sep6-14 02:22 PM Spinnor 1 175 I have learnt in 1st year that the under-damped simple harmonic motion can be described by the differential equation ... Sep6-14 09:34 AM Philip Wood 5 303