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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
Cthugha
168 189,886
It is convenient to assign high randomness high information. Random patterns, however, supposedly present no meaning....
Aug18-14 08:14 AM
sophiecentaur
1 200
What does living in exponential times mean?
Oct21-13 08:37 AM
DaleSpam
5 202
White light is composed of 7 wavelengths. And yet we show white light as one single electrical wave perpendicular to...
Jul30-14 09:40 AM
voko
1 202
I'm working on a project in which I have to build a tiny 4 cm long heater. I did this with copper-windings stuffed in...
Aug9-14 06:18 AM
sophiecentaur
2 202
I want to calculate the energy applied to a slab of steel with a temperature rise that varying with time (t) as - ...
Aug19-14 06:37 AM
HallsofIvy
1 202
Hello guys. I was wondering about slides in a water a park and how they calculate the landing distance to predict...
Aug4-14 06:29 PM
Bobbywhy
1 203
How do you find the angle b/w tangential acceleration and total acceleration vector, Or angle between velocity vector...
Aug12-14 01:26 AM
Lok
4 203
is it possible by any means to use a type of resonance wave to convert the vibrating motion of molecules in an object...
Aug16-14 12:25 AM
Drakkith
3 203
Hello guys, i'm new in this forum, this is my first Thread. I've started reading Robert Geroch's Mathematical...
Jul29-14 06:34 PM
impblack
0 204
Hi, I was looking through a pair of 3D glasses last night at my mobile phone screen and saw something really cool. If...
Aug13-14 06:34 AM
Orodruin
2 204
Hello! I'm was wondering if there is anyone that could help a Marine Biologist finding a "simple" way to calculate...
Jan22-14 12:58 PM
JoaoCorvina
2 205
Hi, I was hoping that somebody might be able to help me better understand/verify a Doppler model from the perspective...
Aug19-14 08:09 AM
mysearch
0 205
Would anyone have a different explanation and maybe an example of radiation flux? Here is the Wikipedia definition...
Aug5-14 03:07 PM
Drakkith
3 206
Waves have energy without mass which can't be true in Einstein's equation E=mc2 If you work out that E=0 (mass of...
Aug7-14 03:47 PM
Nugatory
5 206
Hello everyone, I am beginner to comsol physics.I am trying to simulate a task which contains implemented lift...
Aug14-14 11:17 PM
Greg Bernhardt
1 206
Can we say that positive potential energy means energy is given out by the system when it is brought to the present...
Feb24-14 01:00 PM
DrClaude
2 207
I am doing a research project about wind pressure and the different uses one can achieve by changing the pressure,...
Aug9-14 08:56 PM
256bits
1 207
PLz find the attached image. Each link weight is given. the 50 kg weight with link rotates about the red hinge...
Aug17-14 09:32 PM
Drakkith
2 208
Suppose I have a transmitter and receiver and my friend in the next room also has it. Can we both talk with each other...
Y 12:33 PM
sophiecentaur
4 208
If m mass is complete ly distroy by e=mc2......then what happen about electric charge and magnetic energy?
T 03:01 AM
Matterwave
7 209
Hello (and sorry for this stupid question), Could someone tell me the name of this Hamiltonian H =...
Jul29-14 09:26 AM
kinichi
5 211
Hi, Can somebody give me the formula for pull force of ring magnet(permanent. not solenoid or electric) on a metal...
Aug8-14 01:55 AM
kvkskumar
0 211
I have couple of question related to what motion is; 1) What is the definition of motion in today's physics? ...
Aug14-14 11:44 AM
Drakkith
1 211
Hello, Is spinning an object 360 horizontally a flip or a rotation? This is not homework, this is work work. ...
Jul28-14 04:28 PM
Nathanael
3 212
Hi, I have a thought experiment I'd like to share along with a couple of quotes. First, we consider the moment when...
Jul28-14 11:30 PM
berkeman
1 212
Hi there Can any one tell what is the meaning of boundary conditions for temperature distribution in a flowing...
Aug6-14 09:03 AM
Chestermiller
1 212
Ok here is the question that is being asked. Note that I know how to solve it one way, but when I go about trying to...
Aug14-14 02:06 PM
Teachme
6 213
What does spectral response mean in context of filters and delay lines?
Jun12-14 08:14 AM
UltrafastPED
1 213
Hi, I'm struggling to understand why we never consider normals when doing torque questions? One on the top of my...
Jul30-14 09:18 AM
Jd0g33
2 213
What are the high symmetry directions for a two-dimensional oblique crystal? Please provide a figure of the...
Aug3-14 06:07 PM
D_K_
2 213
Hello all. I am currently studying electromagnetism with Griffiths' books, and I have already donde electrostatic...
Aug17-14 03:13 AM
almarpa
2 214
I imagine it depends on the chemical makeup of their atmospheres.
Aug16-14 04:51 PM
sophiecentaur
2 214
A co-worker recently shared an article with me that demonstrated a sound pulse traveling faster than c. After...
Jul28-14 04:51 PM
PapalPhysicist
5 215
When 2 unequal vertical forces act on the 2 ends of a vertical rope, how do I calculate the tension at the midpoint?...
Jul31-14 01:21 AM
tasnim rahman
1 215
Okay, so Im looking at this article (link at bottom) and it says they have a microorganism liquid contained inside of...
Aug12-14 10:47 PM
Simon Bridge
1 215
So I've recently read newton's third law violates the principles of relativity. I only know how to prove conservation...
Aug7-14 08:04 PM
jtbell
1 216
This is a question about how much general knowledge about science and math has changed since Einstein's death about 60...
Y 10:45 AM
A.T.
5 216
Hello all! I've been trying to go from the second to the third equation shown in the image. Here,...
Jun1-14 12:49 PM
carlosbgois
0 217
A certain laptop says it can withstand 1500 gs. Assuming that it's dropped onto a hard surface, and ignoring air...
Aug1-14 11:50 PM
Simon Bridge
1 217
Hello everyone, I have a question regarding the pattern resulting from droplets of fluid onto a hard surface. ...
Aug12-14 04:26 AM
Lok
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