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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
168 186,666
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 69,524
Hey everyone, Does anyone know what the kinetic coefficient of friction for pine on pine is? I am looking for the...
Nov11-05 12:27 AM
steve9983
1 1,783
If there were other universes being created all the time (and thats a big if), do you think that the laws would be...
Nov10-05 11:46 PM
.:JimmY:.
8 1,517
http://turbod16.com/viewtopic.php?t=19999&postdays=0&postorder=asc&start=0 basically is a car forum with a guy on...
Nov10-05 11:31 PM
.:JimmY:.
1 1,505
Can there be any other case than rotating when the velocity of a body never becomes zero and still constantly changes...
Nov10-05 10:43 PM
.:JimmY:.
2 930
I have two mirrors at the same height on opposite walls facing each other in my bathroom. I took a laser pointer and...
Nov10-05 06:14 PM
Claude Bile
12 4,377
Hi, I recently wrote a text version of the old DOS Artillery Duel or Atari's Cannon Duel game. In this version, you...
Nov10-05 02:36 PM
MBMorrow
1 1,165
i want to build a pendulum in resonace with a balance to see what happens so anybody knows whats the swinging...
Nov10-05 01:33 PM
Tide
1 798
What is the procedure I must make to obtain the point of application of a equilibirum force in a system of forces?...
Nov10-05 08:28 AM
Pyrrhus
17 16,527
I know this is a retarted question, I should probably know this, but to the question. Say I have a wire of length L...
Nov10-05 07:49 AM
ZapperZ
3 2,587
How would you accurately estimate the force of a car crash? Say, a 2,500lb vehicle has an impact with a wall @ 30mph.....
Nov10-05 07:39 AM
russ_watters
8 5,096
Since I cannot post on the Michio Kaku forum, I will post this here (or a MOD could move where its more appropriate),...
Nov10-05 01:52 AM
Mk
11 2,414
I'm looking through some of my physics notes where we derived radiancy equations for black body radiation...
Nov9-05 11:00 PM
eck
1 2,257
Im not sure if anything like this has been posted before, and im not sure if this was the right place to post the...
Nov9-05 05:18 PM
Danger
6 3,326
Is it possible for a torch to light up a wall, but not reflect back to you so that you cannot in fact see the light...
Nov9-05 03:20 PM
jtbell
8 969
Hi, I'm not sure if this is in the right section but here it goes. Ok for the sake of this question let's assume...
Nov9-05 01:37 PM
russ_watters
1 1,851
I was wandering what area this would be called under Physics, however,The question is this... Considering that...
Nov9-05 05:53 AM
Chaos' lil bro Order
6 8,992
Howdy all, I've begun to get started in learning about physics, but am still lightyears removed from any of the...
Nov8-05 08:33 PM
jhe1984
5 6,689
this idea came after an experiment trying to improve the rotation speed of my yoyo: i thought that increasing the...
Nov8-05 07:05 PM
Doc Al
16 3,037
Hey, I'm not a physicist at all, but I am aware of how good some crackpots are of getting media attention. I was...
Nov8-05 05:58 PM
Danger
7 1,613
Would it be too chaotic to allow for stability to arise? would it be "dead"?
Nov8-05 04:19 PM
Gold Barz
11 1,113
I would like to know the physics behind the low attenuation and low absorption of low frequencey sound. Every...
Nov8-05 05:42 AM
Jay-qu
7 2,117
Do photons have mass or are they only energy? And is it possible to convert energy to mass like mass is converted...
Nov8-05 01:26 AM
Mk
4 2,883
is it true that e = mc˛ ?
Nov7-05 03:39 PM
Danger
8 945
Does anyone ever have the feeling that the foundations of physics has flaws, that there really isn't four fundamental...
Nov7-05 09:31 AM
ZapperZ
5 965
I have observed puddles of oil on the pavement with swirling colours more often on overcast days than sunny days. Does...
Nov6-05 06:08 PM
Claude Bile
1 2,609
Hi Everyone, I just joined the forum and would like to extend a big hello to everyone! I had a look around the...
Nov6-05 05:52 PM
pervect
21 2,351
I saw an episode of Braniac recently... I believe it's an english show... the yankees might not know it... but anyway,...
Nov6-05 05:22 PM
Pengwuino
9 2,218
There must be another way to remove heat from electronic equipment rather than passing cool air over the surface? What...
Nov6-05 02:58 PM
Mk
5 2,652
Ok is there a differnce in speed when dealing with blue light and yellow light in air. I have tried read the doppler...
Nov5-05 06:54 PM
krab
6 905
Take light in glass. What could slow it down. I know that stuff is asorbed and then reemmited, but what about...
Nov5-05 02:31 PM
Danger
6 1,236
In my figure, the whole circuit is being pulled to the right. AD experiences no change in magnetic field. Why do we...
Nov5-05 06:31 AM
Doc Al
1 12,447
Hi guys. I have a physic exam coming up in about 4 days. I have tried to learn how to identify the direction of...
Nov5-05 03:51 AM
primarygun
3 1,259
Think.. Can i ever make an object in vacumm and on a frictionless surface move with constant speed.. from rest?
Nov4-05 07:23 PM
ZapperZ
15 1,792
When we realize what is temperature (kinetic energy) and what is radiation (photons), we find out that thermal...
Nov4-05 03:39 PM
Fe-56
7 1,325
A colleague has just posed this question and I need some help. There is a sealed room in space that has no external...
Nov4-05 08:22 AM
ZapperZ
8 1,254
So these earth's magnetism is supposedly produced inside these generator-like chambers inside of which various...
Nov4-05 05:20 AM
Mk
3 2,615
I was thinking about that question (what is energy) and I realized that I could easily understand what energy is and...
Nov4-05 02:52 AM
daniel_i_l
5 1,505
i read an article below and i wonder if it has any relevance in fundamental physics principle of constant sped of...
Nov4-05 01:06 AM
Mk
2 1,254
is there anybody out there in UWO physics who is willing to tutor/help a grade 12 physics student (me)? I am willing...
Nov3-05 11:33 PM
briguy2188
0 1,065
http://www.megalaser.com/gallery.htm they sell class IIIB lasers are these pictures genuine? can class IIIB lasers...
Nov3-05 06:30 PM
Claude Bile
21 2,141

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