# Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
 Views: 707 Announcement: End of year contest, $75+$50 prize! Dec18-13 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 40,038 I have always plugged numbers into the following forumula: KE = 1/2m*v^2 and it works perfectly. :biggrin: I... Feb20-10 04:44 PM cesiumfrog 26 93,771 Why does hot air rise? ( 1 2 3 ... Last) Why does hot air rise? What I'm really getting at is why should the speed of kinetic motion of the individual atoms... Dec22-12 10:58 AM Philip Wood 63 76,942 For a disk in the x-y plane that is rotating about the z-axis which travels through its center of mass, how does the... Nov22-04 05:25 PM Doc Al 3 69,392 Hi, i have a simple question.. What exactly are conservative and non - conservative forces? and why are some... Oct26-10 08:19 AM blkjedi954 8 60,171 I decided to try and learn what entropy is today and I swear to god I've been sitting here for 4 hours and I still... Nov28-10 09:18 PM QuantamMan 38 60,154 ok this has been kind of annoying to me cuz i cant find a good way of calculating this... is there a way to calculate... May4-09 09:39 PM russ_watters 24 58,433 if the normal force defined as the force that acts on an object when it touches the surface perpendicularly, wouldn't... Dec12-10 11:55 AM Sagekeeper 16 57,579 Acceleration due to gravity ( 1 2 3 ... Last) Hello, Does anyone can tell me how to derivate the forumla for the acceleration due to gravity, i mean how to find... Aug15-04 06:07 PM cepheid 73 55,369 Hey, this is my first time on the forum and I have to do a project about bungee jumping. I need to talk about... Jul15-11 12:24 AM Ammar SH 35 46,990 How do i find using integrals, I of a rectangular plate with sides a and b with respect to side b? I know i have to... Dec21-08 05:51 PM darsh_guy 20 46,098 What is Voltage ( 1 2 3) What is voltage? So many words, so many explanations are just hollow echoes off the walls of "authoritative sources" ... Aug11-09 04:30 PM Red_CCF 48 45,410 Torque is when a couple is formed...and for a moment, a couple needs not be there right? Feb20-11 01:38 PM D H 34 41,980 Hi, I am new to this forum, and I just wanna say hi and I am glad that I am here. Now, I have one animation. Isn't... Sep20-07 05:22 PM tabchouri 27 41,330 what is modulus of rigidity and shear modulus? What do they define? Jul23-10 11:45 AM engineers 7 39,179 A paradox inside Newtonian world ( 1 2 3 ... Last) Three weeks ago I have constructed this apparent paradox inside the Newtonian world. ... Mar2-07 01:31 PM ZapperZ 514 38,908 Will someone help solidy this concept of Work 'On' a system and Work 'Done' by a system. If I lift an object from... Nov2-05 03:52 PM russ_watters 4 38,445 i know that B = μH, where B is the magnetic flux density, H is magnetic field density and μ is the permeability of the... Aug10-12 10:57 AM vanhees71 18 38,373 in the vibration theory of a spring mass system the text says that the mass is acted upon by three forces 1)spring... Apr24-09 06:46 AM Doc Al 14 35,506 Can anyone point me to an online resource which gives details - and applications - as to when one should model an... May4-06 09:18 PM Claude Bile 5 34,209 How does the induction cooker work?why aluminium pot does not work? ... Nov29-08 07:19 PM Phrak 11 33,958 Glass is a solid? It is made up of molecules which is similar to what many other solids are made of? Then why is it... Jul31-11 08:14 AM harry8175 13 33,582 So I just watched Walter Lewin's lecture titled "complete breakdown of intuition". If you google it you can find it... Apr8-11 12:20 PM yungman 347 33,089 Take a look at this little web-progarm... May23-08 08:32 PM Shooting Star 5 32,888 I was wondering, how would you prove Gauss's law (either mathematically or intuitively)? I mean, I know that sometimes... Jun30-12 10:26 AM Killingtensor 30 32,881 A metal is not a good dielectric. A vacuum is a decent dielectric. There are much better dielectrics than a vacuum. A... Sep8-09 05:06 AM sp105 11 32,337 The last time I dealt with any physics was 6 years ago in college, so forgive my apparent ignorance: The Situation.... Jun18-07 01:44 PM mgb_phys 2 31,884 current has a direction and magnitude, intuitively it should be a vector but my physics textbook describes it as a... Nov17-06 12:47 AM tim_lou 2 31,642 I have a very simple conceptual physics problem that I am looking to solve, and unfortunately I've been out of school... Jun7-09 10:24 PM Bob S 39 31,480 Hello, I am writing to ask about the specifics behind the concept that recurve bows have an arrow velocity advantage... Jun29-11 05:23 PM markkrebs 9 31,243 All the math based texts just simply derive or state curl(U)=0 but what does this physically mean? Does it mean... Feb11-05 06:14 PM Baggio 5 31,004 Hi, I've just gone through a derivation and would like some confirmation that my reasoning is correct: Say the... May28-08 10:19 PM jbunten 4 30,929 I am currently working on a project that cools water moving through a chilled aluminum block. I am not familiar with... Feb1-12 07:37 AM Arshak 8 29,626 Reactive Centrifugal Force ( 1 2 3 ... Last) I came across this Wikipedia article about Reactive Centrifugal Force. It seems to be saying that this is not the... Sep28-11 01:35 PM D H 403 29,167 How to convert density from mol/L to kg/m3? Feb27-08 03:18 AM Stupid_Engine 3 28,670 Hi, Supose I drop a body of 7 Kg from a height of 2 meters. Is the impact energy equal to: E = m * g * h = 7 *... Jun30-06 09:59 AM Gokul43201 2 28,270 If the motion of an electron creats a magnetic field around it then why is an electron beam in a cathode ray tube... Dec11-11 02:43 PM Philip Wood 7 28,232 Hello, Here is my question: Just imagine the sun would stop shining, without exploding. It would just totally... Sep5-08 11:06 AM h4tt3n 8 28,046 I am one of those who cannot really go into advanced calculations and leave the simple questions behind. I have to... Jul8-11 02:59 AM jtbell 65 27,386 Hey guys, I'm kinda simulate vehicle dynamics. I got gear ratios, torque and RPM values. I find how to calculate... Oct26-10 10:17 AM aussepom 32 27,127 Following a few threads here, I would be interrested this question was clarified as much as possible: How is the... Aug5-06 11:20 AM lalbatros 5 27,016

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