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Quality answers to common physics questions
Jul24-14 11:39 AM Greg Bernhardt 
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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
Cthugha
168 186,325
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 69,420
Hi, I want to know that, the fact that an object reaches its max velocity, does it mean that has reached its max...
Oct14-05 08:14 AM
rafael_josem
4 2,393
Why some things are transparent while others not?:confused:
Oct14-05 08:07 AM
ZapperZ
1 1,370
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
11 1,787
is it possible to find a loophole around a law. like, technically this shouldn't happen, but its not breaking the law...
Oct13-05 11:01 PM
Pengwuino
3 1,337
Is there an equation that will find the velocity of a certain force. Namely, if car #2 crashed into car # 1 and...
Oct13-05 10:30 PM
hotvette
1 1,250
Being that I have little experience in physics, but have grown a fascination for it, I am hoping you guys can help...
Oct13-05 04:53 PM
champ2823
4 1,043
im always confued about negative and positive signs, soemone give em a easy way to remember is whatever is on the...
Oct13-05 04:38 PM
nbo10
1 1,024
How loud does brown noise have to be for it to be effective?
Oct13-05 02:30 PM
blimkie
7 6,394
I am researching virtual energy. Before the integrated circuit there where vacuum tubes. My question is what...
Oct13-05 01:27 PM
Abstruce
2 856
I'm having a bit of a hard time getting my head around this idea. Can anyone provide some links to good references, or...
Oct13-05 09:32 AM
Lonewolf
2 1,268
Hey. What exactly does polarization of light mean? I researched "optically active materials" and I found that they...
Oct12-05 11:06 PM
Kazza_765
5 1,344
I had never known that Michio Kaku was against the Cassini launch. (although, that was back when I was in the 8th...
Oct12-05 10:29 PM
renerob
12 3,395
(a) Can the speed of the waves in the spring be changed? I know it can't, but can someone explain why in a simple...
Oct12-05 09:21 PM
mezarashi
1 7,955
Any one have any thoughts on Thermodynamics or The amount of energy matter realy has stored within. Thermodynamics:...
Oct12-05 08:49 PM
Ki Man
2 2,045
Hi guys. I'm doing this science fair project and I needed to know if there is a substance (any substance!) whose...
Oct12-05 07:46 PM
Claude Bile
14 5,931
I understand that there are a couple of statistical models out there that describe physical systems. One I know is...
Oct12-05 04:14 PM
mathman
1 1,187
Hi, This might be a dumb/stupid/ignorant/*insert name tag here* topic, but I was wondering-- what is a fairly...
Oct12-05 10:41 AM
David
3 1,145
What would be the largest possible particle accelerator if all the matter-energy of the universe was used to build it...
Oct12-05 09:15 AM
ZapperZ
7 2,082
Is it possible to melt a perfect mirror by radiative means? (reflects light of all frequencies with no absorption) ...
Oct12-05 06:36 AM
mezarashi
3 1,526
Well, once again, I ask something about index of refraction. What is the substance that suffers the greatest change...
Oct12-05 06:06 AM
Erkenbrand
3 1,047
Hi a short question: can I use the superposition principle for magnetic fields? reegards tem
Oct11-05 11:41 PM
Claude Bile
3 7,256
Have you ever watched a pot of water boil? I'll bet you have, but did you notice how the bubbles start off at the...
Oct11-05 11:07 PM
Bob3141592
3 5,646
if i have 1kg mass spinning around an axe with a radius of 100 m and i reduce the radius to 1 m what will be the...
Oct11-05 06:01 PM
ZapperZ
35 5,359
heh everyone finishing of some work on cantilevers and how the movement (when attached to strain gages) affects the...
Oct11-05 04:22 PM
FredGarvin
1 1,329
http://www.lsbu.ac.uk/water/amorph.html puts the densities of various forms of amorphous ice at densities that are...
Oct11-05 11:49 AM
russ_watters
9 7,341
What is Jerk? I have a rough idea of what it is, but I would like to know more.
Oct11-05 06:11 AM
russ_watters
13 2,004
I hate to be 'that guy' who asks silly questions among a group of highly intellectual individuals, but I didn't know...
Oct11-05 12:25 AM
pervect
2 976
What is the difference between accuracy and precision?
Oct10-05 07:06 PM
bomba923
3 21,353
http://www.sciam.com/askexpert_question.cfm?articleID=000950E3-6815-1C71-9EB7809EC588F2D7&ref=sciam ...
Oct10-05 05:17 PM
Serj
0 1,314
Suppose you're 20th century's Henri Poincarré and you have to give a speech about what the great challenges are for...
Oct10-05 08:10 AM
Crom!
5 8,132
Hey guys, I need to know if anyone knows of any cool demos to do with a vandergraph generator. It is for a grd 9...
Oct9-05 04:47 PM
Gokul43201
1 23,071
This picture of Einstein I had seen could be definetly signature in my book if the formulas he was writing could be...
Oct9-05 02:13 PM
bernard_constantine
0 2,464
An acquaintance and I are having a dispute and I am looking for an answer that will hopefully end the dispute. My...
Oct9-05 08:42 AM
lightgrav
13 1,712
Acceleration is motion at a velocity that is in a consistent state of change, right? So... v is in terms of m/s a...
Oct9-05 06:35 AM
Trepidation
4 2,402
How does ST vary with temerature? Is there a mathematical relationship? Also, does the sound water make on splashing...
Oct9-05 05:57 AM
dpsguy
8 2,161
I spent some time in the state of West Virginia where many people have streams running through their own property,...
Oct8-05 06:31 PM
Pengwuino
2 6,583
Hi All. Sorry if I am bugging but I have a question. I am not a physics person but would like to see if someone can do...
Oct8-05 12:33 PM
Bryan_CT
8 2,232
I know that it's possible to convert mass to energy. But is it possible to convert energy to mass?
Oct8-05 10:25 AM
pmb_phy
3 1,091
then what is dark matter made of? Is it made of energy, also (in line with the theory that dark matter is what's...
Oct8-05 01:08 AM
Mk
21 7,786
Hi, When reading through the work-energy thread, i just got reminded of something bugging me for quite a while. I...
Oct7-05 10:48 AM
misogynisticfeminist
5 2,923

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