# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Views: 8,727 Announcement: Two free ways to get Gold Membership! Jan17-12 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 05:26 AM ZapperZ 1 41,207 My classical mechanics textbook says that, for a projectile, the linear drag force is given by f = -bv and the second... Jan20-14 04:45 PM shanname 4 149 I am curious how to tell how centripetal accel. changes with radius since there are two equations I can look at a =... Jan20-14 12:39 PM knattagh 8 272 Hi, I would like to calculate the pressure inside a liquid planet in rotation. How can I do ? Pressure depend of... Jan20-14 07:30 AM D H 22 723 So I was thinking about similarities in the nature between these two which could justify similarity in the... Jan20-14 05:11 AM tiny-tim 13 316 Hello everyone, I've been reviewing some concepts on Thermodynamics and, even though I feel like I am gaining a... Jan19-14 09:18 AM Andrew Mason 5 200 In the case of self induction, when the intensity increases gradually an emf is induced which generates a back current... Jan18-14 05:53 PM DaleSpam 4 209 http://fmc.unizar.es/people/juanjo/papers/falo93.pdf In paper authors claim "The largest Lyapunov exponent of... Jan18-14 10:04 AM matematikuvol 0 159 Wire cutting magnetic field lines ( 1 2 3 ... Last) I have read in my schoolbook that when a wire of length l moves at velocity v in a magnetic field cutting the flux... Jan18-14 09:40 AM kira506 81 1,747 Could someone please help me understand the physical significance of TE and TM waves? Jan17-14 11:10 PM Drakkith 1 165 Hi, Suppose the police car moves faster than sound's speed and runs away from the person on the street. Will the... Jan17-14 01:25 PM sophiecentaur 37 1,096 In textbooks I never saw a definition of entropy given in terms of a "measure of disorder", and am wondering where... Jan17-14 10:39 AM Aidyan 5 236 Hi all, This is probably an error resulting from my qualitative understanding of diffraction, but in most basic... Jan17-14 10:15 AM sophiecentaur 10 387 I want to know how to calculate the force , I know the formula and such but its just that I'm not sure about the... Jan17-14 09:38 AM kira506 18 930 Hi, I compute sum of energy in a cycle and I don't find 0, could you help me to find the error ? I started an... Jan17-14 07:45 AM DaleSpam 8 314 I am working through an example of an inverted pendulum on a cart, exactly like this:... Jan17-14 05:14 AM road_king 4 558 Hi, I have a question about resolution as defined by rayleigh's equation r = 0.61 x lambda/numerical aperture ... Jan17-14 04:25 AM Claude Bile 3 315 In case the context, which this question is based needs to be provided, the context follows. A sub-project was being... Jan17-14 04:13 AM Claude Bile 5 282 I was wondering if and/or how one would could calculate the the generation of static electricity between 2 materials. ... Jan17-14 02:02 AM CWatters 1 186 I would like to calculate sum of torque on object composed of one container of helium II liquid and one container of... Jan17-14 01:01 AM Gh778 2 601 Theoretical study. Disks are one above the other. Turn at same rotationnal speed w. Is it possible to choose good... Jan17-14 01:00 AM Gh778 2 474 If you apply 100 volts to a 10:1 transformer you will end up with 10 volts out. If you put a 10 ohm resistor on the... Jan16-14 11:47 PM Andrew Mason 1 177 Hi, I am trying to decide on a topic for my senior project, and my professor and I fleetingly discussed my idea of... Jan16-14 11:23 PM Simon Bridge 3 150 Some background: I am self studying dynamics and I have encountered a fundamental problem with either my understanding... Jan16-14 08:33 PM udtdewclaw 4 191 Hi all, I am currently working on a project and have a problem. I am using a 3 axis accelerometer and attempting to... Jan16-14 07:58 PM mitchjp 4 156 Hi, I have a question that may be a little silly, but anyway, here is it... From Newton's second law we know that... Jan16-14 05:23 PM Brinx 1 175 I understand that taking the boundary condition that the electric field changes \frac{\sigma}{\epsilon_{0}} when... Jan16-14 04:21 PM thegreenlaser 17 340 First of all I would like some explanation on why one can't find a GENERAL solution for the N-body problem, and what... Jan16-14 01:59 PM Khashishi 18 1,467 In my textbook there is an equation for the precession frequency: Ω = τ/Iω The derivation in the book shows no... Jan16-14 01:41 PM Khashishi 1 288 If overdamped equation looks like ##\dot{x}_i=x_{i+1}+x_{i-1}-2x_i-V'(x_i)+F(t)## How to write down the underdamped... Jan16-14 09:31 AM LagrangeEuler 6 214 Hi, Suppose the police car moves faster than sound's speed and runs away from the person on the street. Will the... Jan15-14 05:45 PM russ_watters 55 1,214 I have been doing a research around the physics behind bungeejumping and i need some new ideas. Some of the ideas i... Jan15-14 04:05 PM berkeman 1 145 I want to know how I can calculate the induced emf in the dynamo, I don't know how I can translate the change of the... Jan15-14 01:47 PM CWatters 1 148 the potential energy of a earth-satellite system is -U. the kinetic energy of the satellite is K = -U/2. the... Jan15-14 11:56 AM clem 1 193 Hi, Is Newton's 3rd law applicable to electric charges? I have a problem with a situation where two identical... Jan15-14 08:25 AM ASG141 2 334 In a coordinate system two axes are inclined at an acute angle θ. Is this coordinate system different from a... Jan14-14 08:32 PM rkmurtyp 6 343 Let's suppose i want to send a message over really big (interplanetary, maybe out of the solar system) distances. I... Jan14-14 05:10 PM mfb 25 804 I don't get the point of equations of state since they seem to me to just indicate that we defined too many state... Jan14-14 02:01 PM DrClaude 1 315 Dulong Petit use energy,E=$k_B$T and the probability distribution as f(E)=1. Internal energy,u=3N$k_B$T... Jan14-14 08:01 AM nasu 3 404 I realise that there are two factors that must affect the directivity of a laser. 1, The length of the cavity and... Jan14-14 06:38 AM sophiecentaur 12 375 Greetings, Does anyone know of some good sources that explain classical perturbation theory, preferably using the... Jan13-14 11:06 PM HJ Farnsworth 0 206