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Quality answers to common physics questions
Y 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
168 180,603
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
2 68,388 marlon
Oct4-05 05:40 AM
0 1,517
ok, I am in grade 10, i haven't even started physics class yet, i am working up the courage to go to a very good...
Oct4-05 04:18 AM
3 8,571
I have to pick a topic for a persuasive research paper, and I am quite interested in the nanoteachnology area. I know...
Oct3-05 11:42 PM
10 1,234
Does anybody know much about, or know where I could find out about, diamond colloid? It is the most energy dense...
Oct3-05 10:46 PM
6 2,051
Two planes fly from Toronto to Philadelphia (To. - Philly). Plane A flies via Pittsburgh whereas passengers on plane B...
Oct3-05 10:04 PM
0 1,122
What do you think is better? Lets start a debate!
Oct3-05 08:46 PM
2 9,646
Hello! I am a second year computer engineer. I would like to learn about the electrooptic effect and electrooptic...
Oct3-05 08:05 PM
Claude Bile
1 2,044
Why are ripples on water only circular in shape? Why arent they of the shape of the object dropped in them? Like...
Oct3-05 08:03 PM
Claude Bile
5 3,586
To make the moon deviate from it's straight line path requires a force and I assume this force requires energy....
Oct2-05 09:49 PM
4 1,230
and does the sun also genrate the full EM spectrum? why does it do that and not a certain wavelength, is it possible...
Oct2-05 06:24 PM
2 6,361
Dear Forum, I would appreciate if you could answer this question. (The question is taken from Thinking Physics by...
Oct2-05 05:50 PM
8 1,928
Im having about polarization in physics at university at the moment and I have a question regarding volume density of...
Oct2-05 04:19 PM
0 1,811
Is there an equation that gives the horizontal distance travelled of an object projected at an angle (theta) with an...
Oct2-05 03:43 PM
2 5,789
Hello, I would be interrested in comments, references, books, papers and web pages regarding the problem of...
Oct2-05 10:44 AM
0 753
Hello, I am looking for a book or a web site giving the differential equations for the ovalisation of a ring. In...
Oct2-05 10:23 AM
0 1,441
How many pounds are in a gallon? (I need exact amount). What is the Formula any and all for gallons to pounds. my...
Oct2-05 09:08 AM
7 2,677
We are always taught that a projectile describes a parabolic path (neglecting air resistance), but the path is...
Oct2-05 05:04 AM
4 6,324
consider a piston in an engine with a stroke of 86 mm and RPM 8000 which gives the frequency of sound it is...
Oct2-05 01:49 AM
1 1,343
Hi, I am a grade 12 physics student and my teacher asked us the following question: You have a perfect balance...
Oct2-05 01:37 AM
2 1,309
Hey, I'm currently studying Maths, Further Maths, Physics and Computing A-Levels in the UK (it's high school for...
Oct1-05 06:43 PM
0 869
Hello All, Recently I was asked to help provide some off the cuff calcuations for a stunt being peformed by a...
Oct1-05 03:11 PM
0 1,520
why do the excess changes of a thin infinite conducting plates spread out evenly on the two faces? Is that just a way...
Oct1-05 03:06 PM
2 1,077
Why the circuit must be closed to let the batteries send out electrons? If the circuit is opened, why do the batteries...
Oct1-05 12:27 PM
1 1,170
Please tell me a web site from which I can find the applications of physics in aily life. For example. what is the...
Sep30-05 10:15 PM
0 1,439
I am familiar with the idea of amplitude increases that can be produced by waves that are "in phase". I can imagine...
Sep30-05 08:47 PM
9 4,841
Direction of friction force is oppose relative motion of the surface . What is relative motion of the surface mean...
Sep30-05 07:27 PM
Doc Al
1 6,508
Hi, I recently wrote a text version of the old DOS Artillery Duel (or Atari's Cannon Duel) game. In this version, you...
Sep30-05 06:40 PM
0 3,818
If our space was imbedded in a higher dimensional space with an additional orthogonal space dimension, and a sound...
Sep30-05 04:14 PM
3 959
Hello everyone, I was wondering if there is any relation between the light and the sound speed in a liquid. For...
Sep30-05 03:45 PM
4 4,449
Have you ever heard of SMOT? There is a website saying about free energy.
Sep30-05 09:17 AM
2 1,328
Hello, An item in Jearl Walker's "The Flying Circus of Physics" discusses stirring tea. (4.63) I understand that...
Sep30-05 08:57 AM
Denise Wetli
0 1,135
Can anyone exactly explain 'Restituition'?
Sep30-05 08:23 AM
Doc Al
1 1,172
I have heard one definition of energy meaning a degree of inertial resistance... can anyone give me a different...
Sep29-05 11:48 PM
9 1,113
Hello, I was wondering, if I was in an elevator and wanted to play darts while ascending, would I have to adjust...
Sep29-05 05:29 PM
2 1,479
I'm looking for a text that goes into detail on the workings of laser ring gyroscopes. If it also included information...
Sep29-05 04:50 PM
Dr Transport
1 1,009
What does it mean by laser pulse 10 nanosecond?
Sep29-05 03:51 PM
9 3,247
To anyone who might know: If we add an additional orthogonal spacial dimension, w, to the usual 3 spacial...
Sep29-05 02:43 PM
3 1,795
Matter waves such as an electron have energy, frequency, wavelength. But are they part of the electromagnetic...
Sep29-05 08:00 AM
1 2,710
I have a problem with describe rotational motion for the cube, i met the rotational motion for the circle shapes but...
Sep28-05 03:17 PM
Geoff St. Germaine
1 1,279
Hey. Just out of curiosity, why is it super important to round everything in physics, even stuff such as 2.666(place...
Sep28-05 02:23 PM
Doc Al
4 1,532

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