# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Views: 8,451 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 06:26 AM ZapperZ 1 41,162 What happens if a human was to be a immediately exposed to a vacuum, such as that in space? from what i understand... Jan26-04 11:11 AM russ_watters 8 1,565 If you had an infinitely rigid object and threw it against an infinitely rigid wall, where would the energy go? Oct12-03 07:29 PM russ_watters 8 3,859 How much mass does the sun add to the earth each day? Nov7-03 12:06 AM ahrkron 8 4,243 I am trying to find the moment of inertia for an assymetrical barbell shape. The mass as one end of the 2 meter boom... Dec3-03 12:15 PM enigma 8 6,601 Show that the center of mass of a uniform semicircular disk of radius R is at a point (4/(3*Pi))R from the center of... Dec21-03 04:36 PM smeagol 8 8,273 We all know that torque = force x lever arm, through education and experience, but I can't recall ever being taught an... Jan19-04 08:18 AM Arcon 8 1,112 Is it possible for momentum to be conserved in one direction and not in other directions? Explain your answers with... Feb15-04 04:25 AM RedX 8 2,458 My title is an oxymoron. Anyway, I don't know anything about physics really but I would like to have a question... Feb25-04 02:08 AM elwestrand 8 1,250 A worker on the roof of a house drops her hammer which slides down the roof at constant speed of 4m/s. Th roof makes... Feb13-04 03:03 PM Moose352 8 2,281 I have looked for months in handbooks, online, in encyclopaedias and so on, tried piecing things together fro mvarious... Feb23-04 01:16 PM Bryan Parry 8 2,838 What exactly is charge? I am currently in both Physics 12 and Chemistry 12 and we just started Electrostatics today... Apr16-04 10:45 AM Chi Meson 8 1,371 I have big problem, In a projectile motion problem, we are given a variables for force applied (instantaneous not... May8-04 03:22 PM Gokul43201 8 2,320 This has been bugging me for a while. Imagine a pendulum swinging. Since it has mass and velocity, it has momentum.... Jul15-13 08:18 PM Master Wayne 8 474 how could one evaluate a numerical value for the entropy change of a non-perfect gas? Also,which system has more... May18-04 10:44 AM MiGUi 8 2,649 i was watching sixty symbols today, and i learned about refractive indexes. light travels at 40% of its normal speed c... Jul14-13 08:07 PM king vitamin 8 741 Second law of thermodynamics states that heat does not flow spontaneously from cold to hot bodies. But a cool... May14-13 11:58 AM Andrew Mason 8 688 Today I've got rid of a lot of questions but one remains so far. The definition of temperature I've seen in Callen's... May16-13 10:13 AM Andy Resnick 8 513 In circuits, we have no problem saying that the voltage difference between two point is \cos(\omega t), but what does... May21-13 09:20 AM stevenb 8 942 0k i know net force on a body is defined as mass times acceleration of the body w.r.t inertial frame, but how do we... May12-13 03:45 AM tiny-tim 8 477 I'm trying to form a mental image what's happening with the electrons when you think of the following equation: ... May11-13 03:22 AM pumila 8 654 Hi fellow members!!! I would like to ask a silly question because my basic concepts are quit weak. Since according to... May22-13 07:29 AM adjacent 8 1,156 G = (6.674215 ± 0.000092) x 10-11 m3/kg/s2 or there abouts is the constant that we multiply to the mass of m1 to m2... Jul18-13 09:34 PM WannabeNewton 8 569 I didn't think it would be this hard to find the answer to this, but 1 hour of googling has come up with nothing that... Apr26-13 11:52 PM Bobbywhy 8 1,049 Hello, I just started to read up on some basic electromagnetism and have some questions on: 1) Why do the electrons... May6-13 10:27 AM chipotleaway 8 709 I'm trying to derive the formula for the tangential acceleration of a particle undergoing circular motion... May6-13 11:15 AM nasu 8 854 Hi, this is my first post here. I have a degree in physics and i do some maths and physics tutoring. Recently I... May6-13 07:36 AM Celestion 8 682 Hello, I have observed that if by chance a hair strand manages to cling to LCD Screen like TV or laptop screen, a... May10-13 01:50 PM cjl 8 488 Say, a body of mass 'm' is thrown at a certain angle with the vertical with certain initial velocity 'u'. The initial... May24-13 10:01 AM s0ft 8 577 Frictional Force is mathematically defined as: Ff = μ*m*g*cos(θ) , where μ is the coefficient of friction, m is... May19-13 10:06 AM Chestermiller 8 678 Hello Dear Fellows! We all know that light is an electromagnetic wave and also we know that... May20-13 02:41 PM nsaspook 8 552 I have been looking at mass spectrometers, in particular the interactions between the Bf ind of a charged particle in... May21-13 10:03 PM mesa 8 505 hey all! can anyone please explain where the equation {Gmm_e}/{r^2}={mgR^2/r^2} comes from given $$ma=Gmm_e/r^2$$... May23-13 11:42 PM Zag 8 731 I really need help with this question. A small floating object initially moves with velocity v on the surface of... May28-13 05:17 PM Aero_UoP 8 575 I am working through chapter 10 of Griffith’s electrodynamics (for fun and in my spare time). While I don’t have a... May31-13 11:03 AM Sparky_ 8 538 I have to be honest, the principle of least action seems to me more of a religious claim one takes on complete faith,... Jul5-13 09:03 PM dimwatt 8 807 Hi I've just started learning work, energy etc and the first question in the book is in the form: An object of mass... Jun20-13 12:22 PM cheah10 8 430 If you consider a bullet firing from a gun then you have conservation of momentum and a Newton's third law pair... Jun20-13 09:05 PM Jimmy87 8 565 I am confused how I would add certain resistors, like the ones in the attached picture (sorry it's a bad picture). If... Jun21-13 06:20 PM Simon Bridge 8 526 I have a bit of confusion over how a bulb lights up in a simple DC circuit. My book says it's because the electrons... Jun25-13 01:13 AM davenn 8 491 Hello, This is bugging me so I'd appreciate any help. I have two objects made from the same material with the same... Jul18-13 05:47 AM A.T. 8 625