# 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: 2,634 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 47,904 I have a conceptual doubt concerning capacitors. Suppose that I connect the terminals of a resistor to a charged... Jan2-13 01:41 PM pc2-brazil 5 856 I've seen the standard derivation of the expression for liquid pressure P = dgh where, d = density of the liquid;... Jan2-13 12:15 PM BruceW 13 2,033 On an undergrad engineering level of talk, is there any difference between conduction and diffusion ways of heat... Jan2-13 10:30 AM indianaronald 3 2,106 Convection heat transfer rate decided by Newton's cooling law doesn't have a relative velocity between the fluid and... Jan2-13 10:29 AM indianaronald 6 1,105 Why is the energy stored in a spring 1/2 * distance * force? Isn't work just force * distance? Jan2-13 05:53 AM GeneralOJB 2 604 Ok, so the other day I was chatting with a friend of mine, and this doubt came up... It is my understanding that hot... Jan2-13 12:16 AM SteamKing 5 852 I am trying to understand the derivation of Snell's law using Maxwell's equation and got stuck. My text book says... Jan1-13 08:33 PM Simon Bridge 6 1,198 My brother and I were discussing fuel consumption which lead to this thought experiment. Let's say you have two... Jan1-13 03:07 PM Harut82 9 1,279 to see anything will occur spontaneously or not. A system is isolated, we will look at the entropy. A system at... Jan1-13 04:09 AM Outrageous 0 573 Attached are the drawings. Does the polarity Eof depend on \Gamma =\frac {\eta_2-\eta_1}{\eta_2+\eta_1} So if... Dec31-12 03:23 PM yungman 0 728 Buoyancy is an artifact of gravity that moves mass up away from the center of the earth in a fluid whenever the... Dec31-12 01:26 PM genergy 16 2,490 The field outside a body with spherical mass distribution is well known but for a non simmetrical body (or a almost... Dec31-12 10:22 AM Frank66 6 1,640 Hi I just wanted to run this hypothetical power plant idea past you physics guys to see what kind of feedback I... Dec31-12 10:18 AM russ_watters 42 11,757 Hi, I'm studying Small Oscillations and I'm having a problem with normal modes. In some texts, there is written... Dec31-12 07:46 AM Jano L. 3 915 In rolling without slipping, why does the point of contact have zero velocity relative to the ground? If so, how can... Dec31-12 07:33 AM rcgldr 5 1,737 Hey forum. So I was posed the question whether the forces on two ropes will vary or not depending on if the ceiling... Dec30-12 11:34 PM SweatingBear 10 1,276 Is it correct to assume that two objects, with different masses, dropped from the same height at the same time will... Dec30-12 06:25 PM tiny-tim 8 1,176 I took a piece of carton and cut out to strands in it. When I shine the line through it, it only projects the two... Dec30-12 03:34 PM jtbell 2 1,053 Hello, why if a ray pass though different materials its direction changes ? couldn't its propagation speed just... Dec30-12 08:55 AM barryj 1 523 we know that in rolling motion the top of drum has linear velocity 2v if the centre of mass has linear velocity v.... Dec30-12 06:46 AM Phyman1109 4 805 I want to find Poisson brackets. =\sum_l (\frac{\partial M_i}{\partial q_l}\frac{\partial M_j}{\partial... Dec30-12 02:44 AM bznm 2 1,086 Is that possible to calculate entropy when dq=+100J , temperature change from 271K to 273K ? Ice melt until 273K ,... Dec30-12 01:54 AM Outrageous 6 1,305 So I was reading my textbook and it says that we are given a situation where two particles of the same charge are... Dec30-12 01:18 AM Phyzwizz 2 939 Hi! :) I'm trying to calculate the appropriate lenses to use for a project. I need to magnify a 50mm by 50mm... Dec29-12 11:43 PM kingkahuka 1 964 Alright, here's the context of my question: I have a pistol for home defense, and I keep a magazine loaded with... Dec29-12 07:46 PM russ_watters 6 2,541 In his Nobel lecture Feynman describes an electrodynamic action between a set of particles (equation 1, one third way... Dec29-12 06:13 PM Jano L. 1 685 For ideal gas , can I assume Cv dT = nkT (3/2) , thank you Dec29-12 03:41 AM Outrageous 2 1,233 Hi, Referring to Jackson's Electrodynamics 3ed, page 197, line 5. He assumes that the magnetization can be... Dec28-12 08:09 PM phys_student1 9 1,189 So I watched a video recently on YouTube about how one well placed EMP above the United States would wipe out all... Dec28-12 06:59 PM berkeman 2 793 Hello, when a coil rotates in a magnetic field an AC is produced at the ends of the coil but do that electrons come... Dec28-12 10:12 AM mfb 1 722 Here is a quote from Vanhees 71 in another thread on Lagrangians. I reposted here as a new thread because I fear... Dec28-12 03:12 AM DiracPool 6 1,443 Hi all, I've been having a look at Thidé's treatment of magnetostatics in the free ebook... Dec27-12 08:41 PM muppet 8 894 So I've been curious about electrochromic materials lately. In particular, the amount of time it takes for it to... Dec27-12 06:28 PM SuperFrisbie 0 568 Hello, I am tasked with plotting the polarization state of a laser (basically I've made a polarimeter), but I really... Dec27-12 10:10 AM mfb 4 1,004 why p type semiconductor is electrically neutral and what is the concept of drift current? Dec27-12 03:24 AM Studiot 11 3,218 Hi I have a question on the transmission coefficient in classical optics. When we say that a medium has a... Dec27-12 03:12 AM andrien 2 899 Hello, guys! Yesterday I saw my reflection in a mirror and noticed that my teeth had two images on the mirror, and... Dec26-12 09:43 PM Drakkith 2 1,176 What is the angular momentum of a rod rotating about one end (mass M and angular velocity ш),about its center of mass? Dec26-12 06:02 PM Astronuc 16 2,795 My question is about the strength of magnets and how the strength is affected when you spin a magnet. When I use my... Dec26-12 11:58 AM edguy99 3 745 I a question regarding an object, that is originally in geosynchronous orbit, but then thrusted straight down. Will... Dec26-12 08:41 AM jbriggs444 5 1,136