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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
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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
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I'm a high school student, and recently I came across the US Physics Test (f= ma, semifinal, etc.) And there isn't...
Nov21-09 12:55 AM
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Is there any situation in the world of physics that speed of light > (c=3*10^8) or can it be? IS there any...
Jul27-10 12:31 AM
K^2
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We know If two or more resistances connected in series with an applied voltage 'V', then the equivalent resistance of...
Aug21-10 02:30 PM
AJ Bentley
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Energy in inductor is given as (Li2])/2 but energy is power absorbed in t secs is E=integral(from 0 to t)Lidi here i...
Aug21-10 12:02 PM
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I was working on a problem with an incline plane and two masses connected by a pulley. One mass on the plane and the...
Jul14-12 08:26 PM
the_emi_guy
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I just want to make sure I'm understanding negative work correctly. An example problem where there is a bullet with an...
Jul21-12 07:22 PM
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Following text: "Galileo Galilei is supposedly the first one to prove that the speed of a falling object is...
Apr25-09 05:30 PM
Varnick
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Hello everybody, First excuse me for my English. Could someone please explain how far the electromagnetic wave of a...
Mar28-09 02:03 PM
SMT88
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According to our observation light fades over distance. Please explain to me why light fades over distance in space...
Nov26-08 09:28 AM
Doc Al
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I've always been interested in Physics so have finally decided to do a Physics degree. I've been reading various...
Sep4-11 01:17 PM
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Hope this is the right Forum Ok, so light is a form of energy created by a number of Phenomena, it is created and...
Dec2-04 11:15 PM
Tide
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Now, the conventional way of viewing the solar system is that all the planets orbit the sun, but since you can declare...
Oct14-05 05:21 AM
mezarashi
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Hi, Does anyone know the heat transfer coefficient (&lambda in W K^-1 m^-1) of oil. I'm looking for this for...
Apr5-03 12:14 PM
drag
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There will never be time travel. Time isn't a dimension of its own that can be crossed. Space and Time are one. To...
Jun23-04 02:33 AM
The Bob
10 1,670
If you haven't seen the movie Groundhog Day, you should. It's a good movie. Bill Murray plays a news reporter waking...
May21-04 03:11 AM
shadowman
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Hi I am curious about a few things i have read about light and would appreciate some help. First of all to my...
Sep9-10 05:55 PM
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Ive been reading a "theory" posted it on the internet, that claims time occurs at the speed of light, since that's the...
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I have little knowledge of particle physics in general and have been taught that atoms have positive and negative...
Oct16-10 04:56 PM
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does anyone have any idea what would happen if something with mass traveling at the speed of light, traveled through a...
Mar9-10 09:07 PM
cragar
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Hello, forum search for temperature dependence of Casimir effect gave many results .. so I dare to ask here: does...
Jan28-09 01:13 PM
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http://cosinekitty.com/resistor_cube_1.gif How does equivalent resistance from D to B is 3/4 R ?
Apr14-12 10:45 AM
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What is Hall's Effect? My professor says that depending on the conditions certain charges (either the positive ones...
Mar22-06 01:35 PM
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Hi everyone, I was working recently with a Michelson interferometer and measured the spectrum of the two pulses and...
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A train is travelling at the speed of a bullet. A man, stood on top of the train, fire's a gun in the direction...
Aug19-09 04:05 AM
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I did a lab where the where two electrodes are equidistant on a paper. on the picture the center line is 5 volts...
Feb20-14 02:30 AM
sophiecentaur
12 705
I was wondering if anyone knew what an explosion would look like in a vacuum? Theoretically lets say if something...
Jan23-12 09:12 AM
sophiecentaur
13 16,039
Hey, im trying to write a program that computes Volume of Intersection of a Cone with a Sphere. Can anyone point me...
Apr18-05 08:23 AM
sneez
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I need to convert mol/cm3 into ppmv how would i go about that if i know pressure and temperature ? any leads ?
May20-05 10:02 AM
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I was wondering if there is upper and lower limit (absolute) of frequencies for electromagnetic waves? My reasoning...
Jun23-06 05:53 AM
gato_
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It is said that sun pulls on earth by gravity. Here 'gravity' i mean some attractive field mediated by something....
Jan15-11 12:01 AM
happy.jatt270
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I could not give myself satisfying explanation for this: When a photon(s) hit my skin (from sun) why do i feel...
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Does a rotating rigid disk, for example, feel centripetal acceleration at each point of its body? or more general:...
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I have a basic doubt regarding concepts of current. we know that a resistor is a current limiting device. But when it...
Dec25-12 09:06 AM
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Hi, how can I determine the tangental acceleration of a circle needed to produce a given centripetal acceleration from...
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suppose we have a very smooth and hard surface such as mirror, and we stick a blue tack on it. there is no chemical...
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Naty1
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what will be the colour appearance of the sea on earth?
Aug4-05 03:40 AM
Danger
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suppose we have a superconductor speciment above Tc, and we put it in magnetic field. then we cool it down to below...
Aug13-05 06:40 AM
Caesar_Rahil
1 1,169
Hi there, I posted essentially this question a quite awhile ago but the answer wasn't what I needed and then the post...
Dec30-11 12:56 AM
sniffy
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hi, will putting titanium or carbon under ultraviolet light in a chamber make it much stronger, i seen a thing on...
Nov17-10 07:57 AM
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A). Would a 1/4 or a 1/8 TRRS to USB adapter work with 3.1 speakers and would you need software to make it work?, also...
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