# 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: 500 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 47,684 I've been thinking again. The formula for the Maxwell Speed Distribution for a non-ideal gas is \displaystyle f(v) =... Dec24-12 07:24 PM Jorriss 5 1,101 The standard (retarded) Liénard-Wiechert potentials and the expressions for the electric and magnetic fields derived... Dec24-12 03:40 PM johne1618 0 884 I have been thinking about Ohm's Law in one particular situation. say I have a trace on top of a ground plane on a... Dec24-12 02:17 PM yungman 7 1,483 Assuming $$\vec{r_{a}}$$ and $$\vec{r_{b}}$$ is calculated from an inertial frame of reference. then for any two... Dec24-12 01:11 PM Doc Al 10 1,100 We have a Newtons cradle , when you let go of one ball at one end you know what happens. Rlease one ball and the other... Dec24-12 06:33 AM Redbelly98 10 1,762 When you open a door you apply force in any particular direction and as a result you get rotational motion of the... Dec24-12 05:04 AM D'Alembert 7 1,404 I'm curious about how precession works. From what I thought I understood about angular momentum and torque vectors,... Dec23-12 09:59 PM Andrew Mason 1 774 This question is from my textbook: Thermodynamics an Engineering Approach 7ed SI Units, cengel. It is problem 10-129... Dec23-12 04:35 PM mfb 1 1,234 I hope I can make this understandable. I'm working on a design to utilize combustion of propane to cycle a piston.... Dec22-12 11:19 AM 256bits 1 849 I am familiar with standard distance-time models for paths of projectiles in perfect conditions, ie, where the... Dec22-12 04:48 AM Cleonis 3 989 Hello everyone. I am working on a VTOL RC craft that I hope will work. I was planning on using a centrifugal fan... Dec21-12 01:30 PM blainiac 2 1,013 From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni},... Dec21-12 09:08 AM Rap 1 812 In physics class today, our teacher wanted to demonstrate that mass doesn't have an effect on fall speed. (The class... Dec21-12 07:06 AM K^2 8 1,353 Dear forum I have s issue concerning rectification of a sinusoidal voltage with a diode. It is a experiment i am... Dec21-12 06:58 AM Studiot 19 1,797 Assume you have a weightless constant volume container "filled with" vacuum. If you let it float in the atmosphere,... Dec21-12 06:32 AM sophiecentaur 1 630 So, Poisson's theorem states that if 2 variables, u and v, are constants of the motion, then one can find a third... Dec20-12 09:01 PM Pavlov 5 2,937 I would like to calculate the power of a beam of light once I know the electric field amplitude. For example if I know... Dec20-12 05:45 PM mfb 3 771 Elementary particles spin. So does the Earth. Spin does work. The spin of electrons and other elementary partlces... Dec20-12 05:02 PM mfb 4 787 I'm currently wanting to model an RLC circuit that is driven by a toroid transformer with a driving current, I(t). ... Dec20-12 03:18 PM blargh4fun 0 656 Greetings, I have been having some fun in the last couple of days by looking at the details of historically... Dec20-12 03:17 PM Studiot 16 1,355 Hello guys, I'm studying Thermodynamics and I don't totally see how you introduce the potencials using Legendre... Dec20-12 12:48 PM Philip Wood 4 949 Hey guys, can the work done on a body be described as the function of time during which a force acts upon it? Dec20-12 11:36 AM mfb 7 767 Can electric field be induced at a point near a time varying uniform magnetic field? "Near" means not the in the place... Dec20-12 09:35 AM dev70 14 1,763 Hi, how to calculate the force on a charged conductive body (ball), when that body is between two parallel plates... Dec20-12 04:18 AM juvan 20 1,773 Hi How much volume would be in the following round pipes 1. 1000mm x 50mm 2. 1000mm x 76mm 3. 1000mm x 101mm ... Dec20-12 04:15 AM sophiecentaur 9 701 I have studied a few online sources about static equilibrium in a mechanical system. My overall understanding is that... Dec20-12 12:12 AM rdbateman 7 1,572 Hi everyone, I am no expert in any means, so if what I am asking is silly, just tell me. This is an example. ... Dec19-12 11:57 PM Chestermiller 16 13,270 I just want to make sure my thinking and free body is correct before I go further in a project I am working on; for... Dec19-12 10:54 PM rdbateman 4 701 Hi, I undersand that tension is the force exerted on an object by a string or rope when pulled. Where I get... Dec19-12 10:53 PM rdbateman 11 1,593 Hello! I' currently reading EM and am in need of a verification that I understood it correctly before proceeding.... Dec19-12 05:10 PM GeorgeRaetz 1 543 I was reading a paper about channeling radiation and it had a graph of radiation with photon energy on the x- axis and... Dec19-12 04:06 PM Sirben4 0 493 Relative motion between a permanent magnet and a conductor wire produces electric current in the wire. Would induced... Dec19-12 03:29 PM Andrew Mason 30 4,872 I'm finding it difficult to understand how momentum is conserved in an inelastic collision, but kinetic energy isn't.... Dec19-12 02:21 PM Sweeney 4 1,243 a car of mass 750 kg moving vith velocity 15 km/hr on inclined paddle (θ=7.13 degrees).at distance of 36" the paddle... Dec19-12 02:17 PM rdbateman 1 882 Dear Physics Forums, Pressure is force / area, and force is mass * acceleration. When you have a gas in a... Dec19-12 12:00 PM Studiot 3 1,023 I think that I may be confused about what free energy is. I want to find the maximum PE of a system. So this is... Dec19-12 10:45 AM LizardCobra 0 719 Sorry, I got my answer already. Dec19-12 01:17 AM yungman 0 414 When 2 ideal gas mix, there will be no temperature change. Is that because there will not be any chemical reaction... Dec18-12 11:34 PM Outrageous 2 718 Hey folks. I was reading this odd explanation for why the bottom of a hanging Slinky appears to defy gravity when the... Dec18-12 08:15 PM Karl Coryat 4 588 Hello, I am currently studying the 3-body problem and I am struggling to find some examples of exercises or resolved... Dec18-12 07:52 PM Gigio 7 1,312