# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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 Meta Thread / Thread Starter Last Post Replies Views Views: 5,318 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 48,244 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 Hi guys, I was working on a formula for the optimal angle for simple point-like projectiles free-falling under a... Sep6-14 04:42 AM voko 1 171 Need to know about coefficient of friction for my exam. ... Sep5-14 05:34 PM CWatters 2 176 I was reading Cengel's thermodynamics and noticed that he uses a thought experiment to show that there is no machine... Sep5-14 03:51 PM DrClaude 1 181 I've only recently started learning basic electrodynamics, but I don't understand why a loop of coil with a small area... Sep5-14 11:51 AM Philip Wood 1 254 Say you have a paramagnetic (or diamagnetic) sphere (or some other shape) and you apply a field of H = 10 Oe. Now, we... Sep5-14 09:01 AM physiguy 3 210 The physics textbook i'm working with doesn't seem to give me the required background for working with and... Sep5-14 05:13 AM Philip Wood 2 242 I have a homework problem I need help with. I don't want the answer given to me since I know I can answer it with the... Sep5-14 04:59 AM Drakkith 6 224 Hello everyone, Assume that you have a flat plate, that is moving up and down in a sinusoidal motion with the... Sep5-14 01:47 AM elegysix 1 205 This was something mentioned in an electronics class today (it's an oscilloscope). I didn't copy it down when I... Sep5-14 12:07 AM Shyan 1 176 i ran a simulation that calculates the trajectory of a particle in the presence of a magnetic field from maxwells... Sep4-14 11:43 PM bluntwcrackrap 5 370 I am learning about transformers and from everything I've read I can see how its possible to create a 180 degree phase... Sep4-14 07:51 PM eng90 4 235 Hello guys, I've had the following discussion at work: We are currently using a suture with a nylon thread on a... Sep4-14 07:08 AM Simon Bridge 3 204 I have been noticing a few examples of systems that can extract energy or do useful work from seemingly random... Sep3-14 10:43 PM DaleSpam 18 372 Question: A bullet is fired horizontally aiming at an object which starts falling at the instant the bullet is fired.... Sep3-14 10:14 AM SteamKing 4 260 I want to derive some equations for a 2-D airplane's motion, specifically when it lifts off and lands. Can someone... Sep3-14 02:28 AM Simon Bridge 4 259 Hello, this is my first post. I'm not a big fan of long introductions, so I'm going to spare you my life story, for... Sep2-14 10:10 PM guitarphysics 5 261 This will probably end up being a stupid question with a simple answer, but if you don't ask and just accept things... Sep2-14 06:17 PM Andy Resnick 6 269 What does p = mv really mean? For example, why is there a physical law based upon the product of mass and velocity?... Sep2-14 05:59 PM DaleSpam 69 2,263 Hey everyone, I'm currently working on a project to construct the Bessel function of a vibrating surface of water in a... Sep2-14 10:18 AM Andy Resnick 1 264 So, I'm attempting to programm orbit in Unity game engine. So I need equation that shows r and phi depending on time. ... Sep1-14 03:15 PM GhostLoveScore 9 271 A free rigid body (no forces/torques acting on it) has a constant angular momentum. And yet, I am puzzled because... Sep1-14 02:42 PM samalkhaiat 9 466 One particular experiment that I remember from a visit to a Science Center is the one involving a revolving platform... Sep1-14 02:02 PM A.T. 43 927 If we had a van de graaff generator, near the sphere there is a metal plate ( not touching) and it's wired to the... Sep1-14 11:10 AM abdo799 7 212 My textbook says that the value of the coefficient of friction lies between 0.1 and 1.5. But I see no reason why it... Sep1-14 09:51 AM Murtuza Tipu 7 285 I am trying to make a fiber laser's dispersive beam into a collimated beam by using a convex lens (BBAR, f = 30 mm),... Sep1-14 07:30 AM nordmoon 0 161 A wooden box on a weighing scale weighs 1 kg. Inside the box is a gyroscope which is set spinning, and the box is now... Sep1-14 06:35 AM aeroseek 5 218 A disk of mass M and radius R is held up by a massless string. (The two ends of the string are connected to a ceiling... Sep1-14 12:38 AM Simon Bridge 3 192 I was wondering if we can somehow use the formula Potential Energy = 1/2K(x(x=Amplitude))^2 for a pendulum if we are... Aug31-14 06:53 PM hongiddong 4 166 Two electrons, they have their electric fields and magnetic dipole moments. Their electric field is proportional to... Aug31-14 08:02 AM Simon Bridge 14 340 http://en.wikipedia.org/wiki/Brewster%27s_angle The dipoles that produce the transmitted (refracted) light... Aug31-14 03:55 AM ehild 7 260 From what I know, the pressure of a gas is due to the collisions of its molecules against a surface. So I don't... Aug30-14 12:05 PM Simon Bridge 6 237 My friend and I had this question and after physics-fighting each other we came to a conclusion that the feather... Aug30-14 08:08 AM mal4mac 7 293 One way to solve the simple LC circuit with 1 inductor and 1 capacitor is to use the Lagrangian formulation of... Aug30-14 07:04 AM gsal 3 243 Hey guys can someone please give me a good explanation on why in an RC circuit the resistor voltage is leading the... Aug30-14 06:51 AM gsal 5 193 Wikipedia claims that the Chandler wobble (a deviation of the angular velocity vector of the Earth with respect to the... Aug30-14 04:32 AM vanhees71 2 246 Dear Experts, When we launch a satellite, we launch it from earth which is spinning, so the tangential velocity... Aug30-14 03:35 AM rcgldr 10 253 Could anyone please explain or advice me where to read about principles of Schlieren image formation NOT in terms of... Aug29-14 09:19 PM Steve Drake 1 177 Hello Forum, The numerical aperture NA of a lens is usually a parameter (adimensional) that indicates the lens... Aug29-14 06:20 PM davenn 1 160 So I'm looking at the hessian of the Newtonian potential: \partial^2\phi / \partial x_i \partial x_j Using the... Aug29-14 05:15 PM Chain 2 165

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