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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
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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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hello, I was just thinking since a photon trajectory is affected by a magnetic force.then I would like to know how...
Jan21-12 09:10 AM
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I have a clothes horse on which clothes can be hung parallel to each other roughly 50 cm apart. I place the clothes...
Jan21-12 08:36 AM
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Hi, I am a primary school teacher and have just been observed by my headteacher and a "senior consultant" in a...
Jan21-12 07:10 AM
4 980
I was watching a programme on anti matter 'discovery' whereby a guy claimed that research is going on to create...
Jan21-12 06:53 AM
Vanadium 50
6 1,118
Greetings friends, I have a new idea for desalinating water but I am not good at physics. My idea may sound stupid...
Jan21-12 01:42 AM
2 1,393
Hey guys, Most physics or introductory electronics books that I have read begin the topic of electricity by...
Jan21-12 01:29 AM
16 2,713
I am trying to recreate the Young double slit experiment at my house with a laser. You could call it a homemade...
Jan20-12 11:46 PM
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Hello, I am considering an infinitesimal surface dA that receives a total radiant flux d\Phi, so basically we know...
Jan20-12 05:38 PM
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I have searched online and found that the power of a punch P=Fv, where F is the force of the punch and v is the speed....
Jan20-12 05:01 PM
3 2,671
Someone mentioned this to me earlier while we were talking about fields, I'm not sure if he meant a specific set of...
Jan20-12 04:31 PM
1 760
The object accelerating downward exerts less force on the part below than if it were being held in place, But this is...
Jan20-12 03:59 PM
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Sorry I have a basic question that I simply dont remember... Could you please remind me formula for Taylor...
Jan20-12 02:13 PM
0 1,271
I came across an interesting picture. Many of us know about fluorescent lights being able to illuminate under high...
Jan20-12 12:57 PM
0 1,090
Do photon detectors necessarily need to absorb the photon to detect it (i.e. can photon detectors exist that make the...
Jan20-12 09:06 AM
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Why the referactive index of D2O(deutrium oxide) is smaller than H20(water)?As D2O is more denser than H2O.
Jan20-12 07:36 AM
Claude Bile
1 849
i was having a discussion with a friend recently and he seemed to think that you cannot accelerate to a speed which is...
Jan20-12 05:22 AM
4 1,296
I was wondering about the effects of water on a cellular level when frozen. From what I know, when the water freezes...
Jan20-12 04:13 AM
0 927
I have a few questions about how to find the magnitude of an electric field. 1) I need help with plotting the...
Jan20-12 02:35 AM
Simon Bridge
1 964
Hi guys, I've been studying rolling recently but I'm having trouble understanding some of the concepts regarding...
Jan20-12 01:54 AM
Simon Bridge
1 2,124
I understand the conceptual meaning of gauge transformation which "can be broadly defined as any formal, systematic...
Jan19-12 11:45 PM
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i hope this is the correct place to post this.. are there any other technical ways, besides dimensional analysis,...
Jan19-12 10:19 PM
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i am having a hard time figuring this one out "Does it hurt more/cause more damage when a car runs over your foot? or...
Jan19-12 07:59 PM
4 3,462
interested in the news on this this week. I am wondering is a single strand of this stronger than a woven number of...
Jan19-12 05:40 PM
4 1,911
Why is the speed of light slower in certain substances than in a vacuum. Since most of the atoms is empty, shouldnt...
Jan19-12 04:43 PM
3 857
Is it safe to say speed equals time? The faster in which everything moves internally and externally the faster...
Jan19-12 02:23 PM
2 952
When do they emit α, β+ or β- particle to become more stable? From what I've seen in the text book, β- is emitted...
Jan19-12 01:51 PM
1 900
basically need to look up and use this formula but i can't remember the name. i know it has uses in other fields...
Jan19-12 11:53 AM
0 787
I can't quite understand the concept of force. Force = Mass * Acceleration Work = Force * Distance If you...
Jan19-12 11:25 AM
2 943
If a wire is stretched to double of its length.What will be the strain of wire?I need to prove it mathematically that...
Jan19-12 10:33 AM
4 1,042
Hi, I would like to get rid of the following misunderstanding. Suppose we are looking to an idealized flat diffuse...
Jan19-12 08:31 AM
22 2,040
I'm thinking of testing the ability of different substances to absorb radioactive emissions. The issue is kind of...
Jan19-12 12:09 AM
0 1,431
Two coherent waveforms (could be pulses or wavetrains), that intersect at an angle, as in the picture below. ...
Jan18-12 06:36 PM
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I've almost certain that I have read/ seen from MIT's OCW that the motion of a charge within an electric field does...
Jan18-12 05:35 PM
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If our eyes can perceive light and light is energy then why is energy defined as an indirectly observed quantity?
Jan18-12 04:35 PM
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Ok so I just read this statement as part of an explaination of list using Newton's 3rd law "The amazing thing about...
Jan18-12 04:34 PM
Stan Butchart
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Hi guys/gals, I had a couple random questions on leverage and the human body. I am an active individual that...
Jan18-12 03:41 PM
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This suddenly entered my mind while studying magnetic fields. I know of course that it is the gravitational force that...
Jan18-12 01:36 PM
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Hello I'm new here and i really want to know the anwser to this question. In the game Crysis 2 the wearer of the suit...
Jan18-12 10:45 AM
2 1,671
We know that the universe is expanding,but do we know from which point it is expanding outwards?
Jan18-12 10:01 AM
2 2,070
Can someone give me an go ahead of how I can calculate the energy associated with an axis symmetric jet? I have...
Jan18-12 07:42 AM
3 1,103

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