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Aug12-14 11:12 PM Simon Bridge 
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All physics courses. PDFs, tutorials and web links.
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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...
Sep5-14 05:07 PM
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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 know that I have learned this at some point in my past and that I am probably just blanking on the explanation, but...
Oct19-09 07:53 PM
4 884
Hello, I have had this lingering curiosity for a while. I read through this thread a second ago and would like to...
Oct19-09 04:31 PM
4 1,253
Two chinese scientist have created an artificial black hole that can trap the microwave into the center of this...
Oct19-09 04:29 PM
1 842
Who can help me call BS on the physics of something I just watched on TV. Ok let me clarify that statement, of course...
Oct19-09 04:02 PM
2 1,746
Does every object have a capacitance associated with it? For example, is there a capacitance in a single wire or a...
Oct19-09 02:39 PM
Bob S
3 2,496
Hi, I am interested in the relationship between changes in flow direction (and changes in flow velocity) and the...
Oct19-09 02:39 PM
0 2,280
Can someone explain to me how power sources (e.g. power plants) transmit current/electricity in a sinusoidal (AC)...
Oct19-09 01:36 PM
11 2,061
Seems they invented a device that can decrease entropy....
Oct19-09 01:35 PM
Vanadium 50
18 3,341
according to many lists teh coefficient of kinetic friction of wood and steel varies greatly. any idea to a...
Oct19-09 10:19 AM
northern expo
0 893
So i was thinking, if you drop a ball that has a bouncy property to it, it will travel half as high after the bounce,...
Oct19-09 09:51 AM
8 990
Hey guys, I am so relieved that I found a website like this, and if you can help me out, I would be a very happy...
Oct19-09 08:12 AM
2 1,375
why do we see 2waves when we consider interference ????why not three or four????eg when we find out conditions...
Oct19-09 03:26 AM
6 1,248
I have a problem wih my gutters overflowing and I wonder if it is because of the weight of water in the two sides of...
Oct18-09 10:54 PM
10 3,844
Hi all I'm new to this forum, and this is my first post. I have a question related to a claim by Ralph Rene, and...
Oct18-09 05:10 PM
TK Wilson
2 1,470
OK, so people say that wearing white is better than wearing black in the sun because white reflects light whereas...
Oct18-09 04:39 PM
11 18,603
suppose we have a car on ice stuck in first gear. intuitively, I thought it should still be able attain maximum...
Oct18-09 04:19 PM
5 1,825
The total work done by the force as the object moves from position x1 to xn can be approximated by the formula...
Oct18-09 01:28 PM
mars shaw
0 759
Alright bear with me. I have a physics lab due in a week dealing with the tension between two objects suspended from a...
Oct18-09 11:57 AM
0 1,696
Suppose the power spectral density denoted by P(\omega) where $\omega$ is the angular frequency and \omega = 2\pi \nu,...
Oct18-09 10:51 AM
7 3,414
The formula for calculating the strength of the electric field bewteen 2 flat bar conductors parallel to each other is...
Oct18-09 06:53 AM
0 2,032
When light passes from one medium to other there is refraction but at the normal to the surface no refraction why? We...
Oct17-09 10:07 PM
Bob S
6 1,571
Hello~ Given the average full size bus is 50,000 Kg, how much propulsion would I be required to launch said bus,...
Oct17-09 04:20 PM
6 1,196
I was looking at a program referring to dating the life of the earth and I`m puzzled on a bit that I`m sure must be...
Oct17-09 01:37 PM
2 1,437
This may seem like a silly question, so I shall offer my apologies in advance. I wish design an empirical...
Oct17-09 01:34 PM
Bojan Keevill
12 6,083
Just read the article and you will understand the title. I'm not sure where I should put this so if you want to move...
Oct17-09 12:11 PM
3 1,695
I was wondering when do any of you from scientists or regular tv watcher think that we will have Mechanized human...
Oct17-09 11:45 AM
6 2,362
When talking about the translational velocity of a rigid body in physics, the velocity is always frame dependent, and...
Oct17-09 10:54 AM
0 1,399
Hey, my friend started asking questions about how energy works with circuits, and he linked me this page. I have never...
Oct17-09 10:06 AM
1 975
Lets say I have a velocity vector thats going to the east and I want it's direction to change to somewhere else like...
Oct17-09 06:58 AM
18 5,272
Suppose I have a superconducting solenoid MRI magnet (cooled with liquid helium) producing a static magnetic field...
Oct17-09 06:44 AM
7 1,033
Hi, This has been bugging me for a while now. WHY do objects interact? Suppose I kick a football with my foot....
Oct17-09 06:44 AM
4 1,040
Hello - I was hoping - without getting too technical (please keep everything as simple as possible! =) ) if it was...
Oct17-09 12:27 AM
4 1,094
Is the Mass Defect in the atom due to the Binding Energy and does this account for that small amount of mass? does...
Oct16-09 07:11 PM
12 4,181
Hi, I am trying to link up a series of LEDs and having a bit of trouble calculating the power supply needed. I am...
Oct16-09 05:59 PM
5 1,004
Is it possible to make one of these at home using an everyday glass bottle? If so could anyone tell me how? Thanks
Oct16-09 04:37 PM
8 4,103
I'm trying to calculate what additional force would be required if a load was to be moved up an inclined plane of 6.5...
Oct16-09 04:27 PM
6 1,870
So, it looks like I'm not likely to get an answer to the question I signed up here to ask, but I figured whilst I was...
Oct16-09 02:34 PM
4 1,430
I am confuse of what is inertial frame of reference. Can someone explain that to me? I need a clear explanation...
Oct16-09 10:40 AM
14 3,099
Please clarify / correct my misunderstanding. I'm not a physics pro (just a personal interest). Also, please excuse...
Oct16-09 03:22 AM
1 493
I think my forum name gives it away, I am a home snow maker looking to make a new snow gun and I need a little help...
Oct15-09 11:19 PM
7 2,238

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