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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
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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...
Sep5-14 05:07 PM
170 192,289
This is quoted from "The Elegant Universe" "the velovity of light is a kind of cosmic speed limit, a speed that...
Oct21-12 06:39 AM
17 2,423
If we have a box with mass m placed on a horizontal tabletop. Then we push the box a distance of d. THe coefficient...
Oct21-12 04:35 PM
7 1,405
i no that the frequency range limits are determined by the cochlea where the low frequency sounds are localized on one...
Oct21-12 05:21 PM
2 1,624
OK i am doing a plan design lab about magnetics so the aim is to investigate how to force between two mangnetics...
Oct21-12 08:21 PM
2 536
A man of mass mm = 95 kg decides to paint his house. To do this, he builds a platform using a uniform beam with a mass...
Oct21-12 10:19 PM
2 1,835
I was reading a book, 'Introducing Quantum Theory' by J.P.McEvoy, and I find it difficult to understand in details of...
Oct21-12 11:03 PM
2 677
Why doesen't hand swaying produce sound and why does my slight scratching my skin produce an audible sound?
Oct22-12 03:05 AM
2 538
In our lab we are to measure speed of light by making a light signal travel through optical fiber. At one end there...
Oct22-12 03:28 AM
8 1,328
Hi All! I'm Armenia,learning in the faculty of Physics in our State University. Recently while one of lectures we...
Oct22-12 09:20 AM
19 2,727
Greetings! I'm working on a project that Requires a roughly equal number of up and down spin electrons to be injected...
Oct22-12 09:30 AM
7 1,187
I need some help understanding how much information I can pull out of this data. I have a sample made up of two...
Oct22-12 09:45 AM
1 640
First of all, I'm 13 so I might not comprehend the complex vocabulary or symbols others might use. Second, I just...
Oct22-12 09:51 AM
3 1,242
I am trying to solve a question which gives me the volume of a mixture and its specific gravity and the percentage of...
Oct22-12 11:45 AM
2 2,530
This is a paradox that has been bothering me since I was taking algebra in high school. Let's say that I want to...
Oct22-12 11:47 AM
13 1,698
I have an equation for a non-relativistic particle, in relation to quantisation of a particle in a box, which states:...
Oct22-12 03:54 PM
Mark M
1 855
Let's say an object is held at rest by a force opposite of gravity for a given amount of time. Since it takes energy...
Oct22-12 04:01 PM
43 5,143
Doesn't Felix have an advantage when breaking the sound barrier since the air in which he is moving is less dense,...
Oct22-12 04:06 PM
6 1,083
Hi all, Question about compressing a gas. When you compress a gas it heats up. Does the compression supply a...
Oct22-12 05:04 PM
3 834
So I know the law of energy conservation applies when dealing with electric force, but I don't quite understand what...
Oct22-12 05:35 PM
12 978
So, the question I ask is simple : " Is a screen necessary to view a real image?" For example, when I view my image...
Oct22-12 05:49 PM
8 1,959
hi i have come across a post regarding ignition spark in cars with waste spark management. and my question is... that...
Oct22-12 07:13 PM
18 1,411
Other than nearby light pollution. Or is that the only reason?
Oct22-12 07:24 PM
10 1,525
Hey all, I was wondering if someone could explain the difference between isothermal and adiabatic processes. I know...
Oct22-12 08:37 PM
2 903
"Force acting at an angle doesn't exert pressure on a surface". Is this statement correct or wrong?
Oct22-12 09:07 PM
12 1,291
can anyone tell me the weight of earth?
Oct22-12 09:44 PM
10 814
Hi everyone, First off I do realise that I can't directly convert force to velocity. My scenario is that I have...
Oct22-12 10:27 PM
14 1,620
What happens to range if the initial height is doubled. Say if something is shot at 2 ft and then its shot at 4 ft...
Oct23-12 12:07 AM
4 858
hello! I come across various "energies", like free Gibbs energy, enthalpy, entropy, etc (okay, to be precise,...
Oct23-12 02:34 PM
5 931
I am abilogist who recently have to describe medical imaging....In this while explaining Bremsstahlung radiation, I am...
Oct23-12 02:37 PM
4 774
Looking at the free body diagram of a fixed pulley with a rope going over the top half, the diagram would show tension...
Oct23-12 03:03 PM
5 1,640
Do cloud chambers have any practical use in daily life? I mean, nowadays you can pretty much go and buy a Geiger...
Oct23-12 07:33 PM
4 563
To calculate the exact fall time of a mass, constant g is often used for a short distance traveled as for example in...
Oct23-12 08:05 PM
8 1,546
I'm sorry to be annoying on this forum, I am new to the physics world! I am an undergrad taking physics I but am also...
Oct23-12 10:41 PM
4 1,207
I'm not sure where to put this thread, so I just placed it in here. One thing I know is that a newton is the net...
Oct24-12 12:51 AM
9 1,604
I can't represent me mentally what is an electromagnetic wave. I know that a mechanical wave is the propagation of...
Oct24-12 04:29 AM
26 2,456
If the temperature is kept constant,what happens to internal energy if the pressure is increased in piston?
Oct24-12 05:32 AM
9 1,194
Hi a simple question that struck my mind.Let's imagine a ferrite magnet from a old loudspeaker now let's put that...
Oct24-12 06:49 AM
AJ Bentley
7 631
I need a simple method to measure eddy currents in a pipe. Thanks.
Oct24-12 09:17 AM
AJ Bentley
1 473
Hello, i was wondering if someone can help me out. I finished law of momentum, and learned that for the conservation...
Oct24-12 09:38 AM
4 823
Hi, In a power transmission cable, the power, P=24W, Voltage=12V, the resistance of the cable, R=4 ohm. What is...
Oct24-12 09:58 AM
7 1,383

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