# Sub-Forums : General Physics

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May25-09 10:31 AM ZapperZ

# General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
 Views: 8,594 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Pinned: Recent Noteworthy Physics Papers ( 1 2 3 ... Last) The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have... Jan31-14 08:33 AM ZapperZ 165 157,369 Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a... Apr22-11 05:27 AM ZapperZ 2 62,601 *Currently enrolled in University Physics 2* We have not covered the topic pertaining to light yet, but we are... Sep13-13 07:22 AM dwn 7 516 i am very confused by the idea of magnets how do magnets attract things ? and if they do attract things , then what... Sep13-13 05:25 AM Drakkith 8 477 There are numerous threads here about ball lightning but Im not exactly sure have any of those addressed this issue?... Sep13-13 04:28 AM Bobbywhy 5 430 How exactly can the angular velocity of a 2 dimensional laminar object be the same with respect to all axes of... Sep13-13 03:05 AM namanjain 1 320 I know the visible spectrum,(400nm(violet)-750nm(red)) but I cant seem to find the wavelength of white light, can... Sep13-13 02:30 AM Bobbywhy 5 391 reading this page : http://hyperphysics.phy-astr.gsu.edu/hbase/electric/potsph.html it says "The electric field... Sep12-13 11:52 PM quawa99 2 396 Referring to following image, Does anyone have any suggestions on which side is positive polarity? Thanks in... Sep12-13 07:10 PM davenn 6 347 There's something that I don't understand about the buoyancy formula. Is the buoyancy defined by the density of the... Sep12-13 06:28 PM PhyIsOhSoHard 7 402 Hello All, I have been reading this thread, trying to understand the concept of action. There is one very... Sep12-13 05:36 PM DaleSpam 5 496 Yes, I understand the equation for the cross product and the right hand rule. People keep using this example with... Sep12-13 03:39 PM gmax137 4 635 I was doing a problem: An infinite conducting plane has a uniform surface charge density of 30 μC m‾². Find the... Sep12-13 09:19 AM jtbell 2 408 Hi folks, I have a rather simple question on error propagation - I have 2 sets of models, where the results from... Sep12-13 08:33 AM DaleSpam 3 370 hey guys, I have a question... If car 1 weighing in at 4400lbs is traveling at 0 degree heading at 55 MPH and is... Sep12-13 03:29 AM sophiecentaur 4 531 I'm building (or rather, debugging) a lightning detector that detects the electromagnetic charge emitted by a... Sep12-13 02:37 AM sophiecentaur 4 306 For example at the surface of both magnets, the field strength is 1.5Tesla. Suppose the top magnet plus the weight... Sep12-13 01:19 AM mikeph 5 568 Hello people, I'm working on a research project involving the modelling of a black body's radiation spectrum, and... Sep12-13 12:12 AM ehild 25 1,221 I have built what I call an Atmospheric Acoustic Observatory. It could also be thought of as a high-resolution... Sep11-13 05:05 PM cjl 14 553 Greetings! I'm interested in depositing a Line of fine copper powder on a plastic substrate. Due to Limitations of... Sep11-13 04:22 PM sophiecentaur 7 470 Gravity Law ( 1 2) As gravity law says: F=G( (m1*m2)/r^2). That means that power between two objects with more mass is biggest. Why? It... Sep11-13 12:28 PM russ_watters 20 716 Hello, I need some information about spherical mirrors that I can't find in internet or this forum. How to... Sep11-13 11:43 AM Low-Q 9 491 This may be more of a math problem; it arose out of my curiosity of manipulating LED matrices and reminds me of a... Sep11-13 10:33 AM mfb 3 316 Hi! I am trying to compute the natural frequency of a system and I also need to add the added mass term to my... Sep11-13 10:10 AM AlephZero 3 472 Consider a massless string going over a massless frictionless pulley with masses M1 and M2 at the end of the string. ... Sep11-13 07:36 AM Tanya Sharma 8 753 So if you have one positive charge and one negative charge (both with the same arbitrary number of field lines) close... Sep11-13 02:38 AM Jasso 1 455 Hi Here is what confuses me about light .. if i am standing at a beach at new york assuming that the sky... Sep10-13 07:29 PM meBigGuy 22 1,039 I'm struggling to understand the implications and origins of the 2nd law. Entropy is such a slippery subject. ... Sep10-13 06:27 PM mfb 1 477 Suppose a particle is moving along the $x$ axis with velocity $v$. It starts at the point $-5$ and has constant... Sep10-13 04:14 PM Nugatory 3 502 So, will F=ma work if mass is in pounds mass and acceleration in ft/s^2, or will a proportionality constant need to be... Sep10-13 01:50 PM lugita15 25 1,403 Hello, SCENARIO : I am a game developer and I am playing around with rigidbodies. I have a piece of wall which... Sep10-13 10:41 AM CWatters 2 458 When I step on a scale I see that it says....70kg. We typically call this value weight? However, kg is used for "mass"... Sep10-13 09:07 AM russ_watters 51 21,081 In forced vibration, amplitude of vibration changes periodically. Is it right ? I think it is a correct statement,... Sep10-13 01:57 AM sophiecentaur 4 332 I understand simple concepts, like \frac{dx}{dt}=v and why that is, but when I'm doing, for example, uniform charge... Sep10-13 01:49 AM ThomasO 2 554 This is the example 2.12 from "Introduction to Chemical Engineering Thermodynamics", 6th. ed, by Smith, Van Ness &... Sep10-13 01:32 AM ThomasO 6 660 Greeting PFers, I need to use the low pressure region inherent within the cross section of a laser beam for a... Sep9-13 03:13 PM taylaron 6 425 According to my prof, increasing intensity of the light source in a photocell for the photoelectric effect does not... Sep9-13 02:29 PM dauto 2 458 Hi, I recently did a homework problem for my introductory Quantum Mechanics course and in the problem we were given... Sep9-13 12:10 PM PAllen 10 854 as the Electric field is perpendicular to magnetic field , would the over all sum of the sinusoidal waves would turn... Sep9-13 12:00 PM DaleSpam 4 470 If I use two sources , one for alternating electric field ( frequency equal to the frequency of a wave in visible... Sep9-13 11:33 AM DaleSpam 4 503 i was watching this show on the science channel called the known universe it stated that we never really touch... Sep9-13 08:45 AM DaleSpam 49 47,163 Hello, If I apply force on a rigid cube, I can find the torque τ as: τ = F x r Now, from torque τ I can know... Sep9-13 04:25 AM namanjain 11 620