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Jan16-12 Greg Bernhardt
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
May6-14 04:32 AM
Cthugha
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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
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i got an assignment for physics and my class hasn't done alot of vertical motion yet, it sounds like a pretty traight...
Jul9-11 04:14 AM
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Hello, When calculating the dynamic structure factor I need to express \rho(q) in terms of creation and...
Jul9-11 01:27 AM
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Hello I am currently building a water rocket. I would like some help on finding the equation for the force that is...
Jul8-11 10:30 PM
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I was thinking about the analogy of an observer living in a two dimensional world. So as it goes, this observer would...
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I am trying to get the most complete picture of the structure of atom. I understand generally how elements and...
Jul8-11 07:54 PM
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Hi, this really isn't a homework problem - it's posed in a text book I am using to revise having not used physics for...
Jul8-11 04:40 PM
sophiecentaur
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In trying to understand electricity I thought of the following: If I set up a wire one light year long, stretching out...
Jul8-11 02:12 PM
NightSwimmer
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air, glass, mica, rubber, water, etc all are insulators because they don't have free charges to carry the current.......
Jul8-11 11:27 AM
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Hello I am taking some measurements with a spectroscopic ellipsometer, a measurement technique with which I have...
Jul8-11 11:11 AM
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Hoi! I was wondering about the Faraday cage. When lightning strikes a car, the driver is not hurt since he/she is...
Jul8-11 10:41 AM
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Hey guys, Im trying to design a electric gear shiftier for a motor bike. Basically I require about 200N of force to...
Jul8-11 09:04 AM
danR
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Hi, I have got a single mode fibre (SMF) with core diameter 8.4 microns. Fibre is aligned in front of horizental...
Jul8-11 08:10 AM
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Hi I would like to ask that what makes a transparent medium transparent ? What happens when a photons of light passes...
Jul8-11 05:02 AM
srivi
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Hi, we are starting Waves in physics at school (I'm only strong in motion) - So if you guys have anything basic to...
Jul8-11 04:14 AM
Born2bwire
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why is higher voltage being induced when switching off than switching on a RL circuit? I don't understand why...
Jul8-11 02:17 AM
kimphysics
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Friends: I have been thinking about this question for a while, so I hope you can help! Here it is: Lets say you...
Jul8-11 01:29 AM
derek88
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Let's say i have a sealed container with half water, half air, and i would like the air pressure to remain constant....
Jul7-11 11:52 PM
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Hi guys, cant find a post similar to this so ill ask; What does a blackhole look like from behind? The spatial...
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What is a point charge??? I have read wikipedia but m not much satisfied... please can you explain me in your own...
Jul7-11 11:07 PM
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I have a question about how the solid respond to stress at different stages. In text books the slope of typical...
Jul7-11 10:42 PM
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Hi, I'm learning physics and I am a bit confused by this equation which gives me the acceleration of gravity on...
Jul7-11 07:49 PM
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At higher altitudes in the atmosphere, why do aircrafts (particularly fighter aircrafts) with jet engines leaves some...
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Hey, Just a general question. So, I've just learned that the force of Net gravity anywhere in a shell is 0. And...
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When a point charge is put in a medium, it polarizes the medium and thus reduces the total electric field inside the...
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Say I have a device (Thermoelectric generator) that "generates power" at 4 watts, as per watt meter reading, is it...
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Hello, I am wondering whether an Archimedes screw generator would work in a pulsating environment. What I mean by...
Jul7-11 09:52 AM
danR
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I have two main questions about light, one does gravity affect it? Two, does it have mass? I have read lots of posts...
Jul7-11 09:03 AM
Trevormbarker
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I am wondering what any experts think about these Wikipedia explanations of radioactive decay. (Wiki asks for help...
Jul7-11 06:03 AM
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Hi! I want to test my Physics teachers knowledge with a really complex question. Possibly something like the tie break...
Jul7-11 04:02 AM
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A quick shortcut for problems that involve a weight (W) hanging from two cables with tensions T1 and T2 and angles A...
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As far as I can understand, after inducing a current inside a superconducting ring or spire, the current keeps flowing...
Jul7-11 01:22 AM
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When two waves that are 180 degrees out of phase interfere, the energy from both cancels out. Why is it that, for...
Jul7-11 12:55 AM
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If we had a powerful enough computer, and we supplied to it the laws of physics known so far and the atoms a bacteria...
Jul6-11 09:52 PM
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Hello Forum How much falling water would I need to potentially generate 3 KWatts (240 ACV @ 13 A) of electrical...
Jul6-11 07:04 PM
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While studying the Doppler effect at school, it struck me as strange that the following two problems have different...
Jul6-11 06:31 PM
sora
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Hey, I have a question I'm stuck on for my grade 12 physics class. There is a block being pulled by tension over a...
Jul6-11 05:30 PM
mayodt
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Does anyone have a good website for some questions/answers for Newton's three laws (I'm not sure if he made more, but...
Jul6-11 04:08 PM
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Hello everyone, I'm trying to come up with modeling for one of my experiments and I was wondering if I could get...
Jul6-11 03:53 PM
dmanofdland
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My textbook says that, the energy level of an electron is decided by the pattern of charges surrounding it. Can...
Jul6-11 03:42 PM
alxm
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Hello everyone, My general goal is to understand why and how certain physical formulas came to be written, a...
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