# 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: 2,380 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 47,867 The problem gives me a mass at the top of an inclined track. the track is not linear but curved and the bottom of the... Sep11-08 01:46 PM lightning208 2 1,071 I was asked this recently and the only explanation I could come up with was that the Earth is oblate and the... Sep11-08 04:11 AM D H 2 2,211 In one dimentional cases, will the velocity of a particle tend to the terminal velocity unregardless of any... Sep11-08 02:12 AM Lucien1011 2 1,324 Follow the below four steps to amuse yourself 1) Take a semicircular wire. You know that its COM is at (0,2R/\pi).... Sep10-08 08:08 PM matematikawan 5 2,396 A magnet surrounded by copper wire spins generating a A/C current down a wire for as long as it spins. Are electrons... Sep10-08 08:06 PM russ_watters 9 1,505 I was learning a bit of centrifugal/centripetal forces, and then I asked myself. If at the equator, the Earth rotates... Sep10-08 07:26 PM matematikawan 5 19,816 I am currently a grad student. Part of my PhD work will be to formulate a mathematical model of a manufacturing... Sep10-08 02:22 PM engineer23 0 2,291 I'm driven crazy by this question these days. so here it goes. Consider a ball sliding on a frictionless surface with... Sep10-08 09:20 AM atyy 15 2,256 i've been trying to get the exact definition of a banked angle but so far, i've gotten nothing so i would like... Sep9-08 10:29 PM Antenna Guy 1 2,030 Start with: $\frac{d}{dt}$ $\frac{dL}{dx"}$ = $\frac{dL}{dx}$ (d/dt)(dL/dx") = (dL/dx) Now intruduce three... Sep9-08 08:44 PM alejandrito29 0 673 how can we say that torque is equal to power / angular velocity though we know that torque is equl to I x (change of... Sep9-08 04:53 PM russ_watters 4 6,125 We may say a process is adiabatic if it occurs fast enough such that no heat is exchanged from the system.But we also... Sep9-08 09:14 AM Count Iblis 4 3,258 The relation between the angles for which the minima occurs for a Fraunhofer diffraction(parallel rays, large... Sep9-08 07:15 AM Antenna Guy 8 1,899 I'm a biochemistry major entering my junior year. After completing the requisite general physics course, I found that... Sep9-08 12:35 AM atyy 4 5,017 Hi, I have read that Thermal Conductivity means: “The thermal conductivity of a substance is the quantity of heat... Sep8-08 09:38 PM Kasper_NYC 1 1,957 Please help me to know moment, moment of inertia (mass,area,polar) and difference between them. How can we obtain... Sep8-08 08:50 PM sri.karmarkar 0 543 Not sure if this is the right place to ask this, but why is the average shear rate in a cylinder 2/3rds the shear rate... Sep8-08 06:49 PM physics_forums 0 1,202 I'm a new teacher to E&M and confess I was a lowly Chemistry Major who needs some help. A proton and a particle of... Sep8-08 01:23 PM clem 6 3,030 according to the figure attached below , do we have a coriolis acceleration on the slider and why ? why cant we... Sep8-08 11:35 AM firavia 1 825 Here is simple counter example to 2nd law of thermodynamics - converting heat into work. Everything is in vacuum,... Sep8-08 09:19 AM Constructe 12 1,779 In a 300kv electrical power line the electrons must be in a conduction band. How does that correlate with work... Sep8-08 03:57 AM carbrook 0 1,360 What is the classical microscopic mechanism for absorption of EM waves? Consider a free charge isolated in the... Sep7-08 08:38 PM cesiumfrog 15 2,036 The D (displacement) vector has only the free charges as source. I heard it is better to work with D than E, because... Sep7-08 04:09 PM Andy Resnick 12 1,575 1. When someone loops, and the person blocks, the ball goes out...if the ball really rides up the rubber, shouldn't it... Sep7-08 07:39 AM pingpongpaddy 10 9,072 hello smart people I came across a weird equation for entropy and do not know how it was derived. It looks like this... Sep6-08 08:39 PM Count Iblis 3 5,352 I have been learning the concepts of voltage, current, and resistance. I am aware of Ohm's law and have read a lot of... Sep6-08 08:33 PM russ_watters 25 2,758 Hi. In electromagnetics, a material(linear,isotropic,homogenous) with constitutive parameters \epsilon and \mu has... Sep6-08 06:38 PM Antenna Guy 1 5,269 I just got an idea with believe that if an object of carefully choosen material is suspended in water(for now) and... Sep6-08 11:29 AM virtueboy15 2 1,317 -in balancing masses , why do we always say that we need to put a mass in a rotating disk that produce a centrifugal... Sep6-08 11:05 AM firavia 10 4,417 A 2.41microF and a 7.38microF capacitor are connected in series across a 30.0-V battery. A 10.3microF capacitor is... Sep6-08 10:45 AM rave7 1 1,204 I got a question that depicted the elliptical orbit of a comet over two intervals of the orbit, covering sectors, with... Sep6-08 06:12 AM tiny-tim 3 2,730 Is there a way to have some observables, apply an equation and find a measure if the system is chaotic or not? For... Sep6-08 03:06 AM atyy 1 1,070 Hello everyone, I'm new to the forums, currently in grade 12. I'm planning to build a linear multi-stage coilgun as a... Sep5-08 09:51 PM Lancelot59 0 1,198 L = \frac{\partial \Phi}{\partial \left(cos \Theta \right) \ \partial \Omega} What is this quantity? I mean, I... Sep5-08 12:25 PM Somefantastik 3 1,702 Hi, In the process of reading up about dark energy in the field of cosmology, I felt I was beginning to lose sight of... Sep5-08 10:30 AM mysearch 1 1,692 Hello, Here is my question: Just imagine the sun would stop shining, without exploding. It would just totally... Sep5-08 10:06 AM h4tt3n 8 31,307 I have a question about waveguides: Say your input is an electromagnetic field of a certain time frequency, energy... Sep5-08 08:35 AM fisico30 0 948 Hi, i would like to calculate a field after passing through a lens using fresnel integrals. Sep5-08 04:48 AM mdegama 0 1,366 what will happen if light passes through changing magnetic field? Sep5-08 12:20 AM atyy 13 2,366 My electrodynamics lecturer was talking about how potentials are arbitrary and that's why we have different gauges.... Sep4-08 02:02 PM granpa 2 1,398