# 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: 2,671 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 47,913 When I have an ideal mixture of 2 liquds, A and B. so the partial pressure of A is PA=PA°xA while for B, it's... Jul28-13 09:35 AM Chestermiller 27 2,267 for RF, how does this mechanism work? http://i.imgur.com/Crx4Amx.png how does the conductor do this? and why... Jul31-13 10:45 AM Enigman 9 856 Rusty on the math... I am working on a problem and need the derivation of a free fall trajectory for an object at... Jul29-13 03:06 PM Creator 8 703 Hi, Suppose we look at two dimensional Poisson's equation in a medium with spatially varying (but real) dielectric... Jul27-13 07:21 AM Chestermiller 1 541 I've been told (since high school I think) that "view angle" in a 2-dimensional plane is approximately (distance to... Jul29-13 08:03 AM Andy Resnick 6 1,380 why is force equal to rate of change in momentum rather than rate of change in kinetic energy. If we consider time is... Jul28-13 08:13 AM bodhi 16 1,101 The potential due to a polorized distribution is given by: V( \vec{r}) = \frac{1}{4 \pi \epsilon _{0}} \int _{V}... Jul29-13 03:45 PM DrDu 20 1,028 When considering electric field in a dielectric media,there are two forms of Gauss's law: \oint \vec{D}\cdot\vec{d... Jul27-13 08:40 PM Simon Bridge 13 688 I am just reading through this free online textbook and it seems to me that there is a mistake on page 24. ... Jul26-13 06:19 PM Redbelly98 3 425 In this video at 7:15 you see a rifle fired underwater: cp5gdUHFGIQ Apparently even before the bullet leaves the... Jul31-13 10:07 AM A.T. 20 1,516 Hey all! I'm building a simple low cost Fourier Transform Infrared Spectroscope as a summer project. for those... Jul27-13 06:24 PM Drakkith 1 411 I am not sure I get the concept of centrifugal force.. If we have a stone tied to a thread and we just spin it in a... Jul30-13 12:03 AM DaleSpam 35 2,113 I am interested in the main difference between transitions from electric fields from Conductive to Conductive/... Jul29-13 01:51 AM DrDu 1 363 How to find the linear dispersion of a Direct Vision Prism with given parameters? Jul29-13 10:46 PM itsnaresh 0 338 Hi guys, After reading a paper about electron scattering, I became very interested. So if an electron is... Jul30-13 10:02 PM Simon Bridge 6 599 State and justify the techniques you would use to reduce the errors of the following. Each explanation should show a... Jul27-13 11:24 PM Simon Bridge 1 558 I think no matter what are the mass of two objects, there must be a fix angle between the angle of two direction. Is... Jul28-13 02:02 AM Outrageous 4 790 Hi All! I've been doing some research in an attempt to uncover the proportionality between usable traction, which is... Jul29-13 06:08 PM tduell 2 518 i think i've asked this a number of times on different posts stemming from various discussions but i don't think this... Jul28-13 07:54 PM Drakkith 2 475 Since every mass attracts every other mass according to Newton's universal law of gravity, why don't I just get pulled... Jul28-13 08:05 PM Drakkith 8 786 harmonics... got it.. but for instruments, whether they have a sound cavity (brass instrument or woodwind) or a... Jul28-13 06:27 PM turbo 6 502 Hello everybody! I read that if one of the two materials involved in Snell's law is a conductor, the refraction angle... Jul31-13 05:41 AM EmilyRuck 10 910 Does any body here have any information about gravitational vortex power plant..? Jul31-13 11:22 AM Drakkith 7 752 Good afternoon all My question is, when we observe stationary waves, and we know that at a certain point, the sound... Jul29-13 03:58 AM Bobbywhy 1 648 How exactly would you describe the principle of a valve for flow control? In a globe valve for example the fluid... Jul30-13 04:28 AM gmax137 5 750 Hi all, I notice the patterns such as v = 0.5at^2 and PE(spring)=0.5kx^2, etc...but, all examples I have seen show... Jul29-13 10:08 PM PhanthomJay 4 454 I think everybody here knows the equation that gives the potential of a point like dipole, but how does the field look... Jul30-13 02:03 AM DrDu 1 386 What's the difference between cold moving air and hot moving air? For instance, suppose you put two fans, of the... Aug1-13 11:18 AM russ_watters 11 965 Hi All, I'm having a bit of trouble remember basic physics and hoping someone can help If i've got the wrong... Jul29-13 08:50 PM basil4j 0 390 Batters swear that batting gloves improve their performance. From a physics standpoint, why is this? My impression... Jul29-13 10:09 PM Simon Bridge 1 353 Hi PhysicsForums. I have a question. I was looking through a manual for an industrial grade PC, which is fanless,... Jul30-13 02:31 AM 256bits 2 418 http://en.wikipedia.org/wiki/Gradient#Cylindrical_and_spherical_coordinates which formula do we apply to get the... Jul31-13 06:37 AM igorronaldo 4 538 The following are Maxwell's Relations right? \left(\frac{\partial s}{\partial v}\right)_{T} = \left(\frac{\partial... Jul30-13 09:15 AM jtbell 1 422 I am trying to study the motion of a falling body in the earth’s gravitational field however not assuming a constant... Jul31-13 02:43 AM rcgldr 10 542 Hello forum. I am finding it hard to wrap my mind around the concept of power when considering forces. We can... Jul31-13 11:29 AM Drakkith 3 675 So, I was wondering if a conducting loop was placed in orbit around the Earth would it be able to generate a current? Jul30-13 10:24 PM Simon Bridge 1 781 Hi all, Any ideas how to solve this integral?  \int_{0}^{\pi}... Jul30-13 08:18 PM klawlor419 2 493 Trying to get my head around something with the Darcy Weisbach. It is used to calculate the head loss of a moving... Jul31-13 06:57 PM SteamKing 1 554 Please watch 05:00 to 08:00 http://www.youtube.com/watch?v=jbmFcGhTnS0 Force = Mass x Acceleration So for... Aug1-13 08:13 AM DaleSpam 30 1,859 I'm curious what models there are for calculating the Electric Susceptibility in crystalline solids and any books that... Aug1-13 01:56 AM DrDu 1 533