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Aug12-14 11:12 PM Simon Bridge 
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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...
May6-14 04:32 AM
168 190,907
What does living in exponential times mean?
Oct21-13 08:37 AM
5 208
Can someone please explain the lift coefficient and drag coefficient in simple terms? Thanks.
Aug17-14 05:27 AM
1 209
Can combining a magnifying glass and a prism make a rainbow capable of ignition?
Aug2-14 08:16 PM
1 211
At the moment I am trying to understand classical field theory and there's a conceptual problem I encountered, which...
Aug29-14 06:55 AM
0 211
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
1 213
Hi! I want to conduct an experiment to investigate the effect of sucrose concentration on refractive index using a...
Aug6-14 05:04 AM
2 213
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
2 213
My prof was going over some definitions and he made a statement about ratios of extensive properties, he said: ...
Aug23-14 04:50 PM
Doug Huffman
1 213
why lithium is good for battery's. .....what the property's for lithium...
Aug8-14 08:38 PM
1 214
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
0 215
We are using a smart phone app to add vectors; once we get the resultant angle, we need to determine what direction...
Aug11-14 02:23 PM
3 215
I have a recipe that begins with sauteing onions in boiling sugar. It occurred to be today that I don't know what the...
Aug9-14 01:28 AM
1 216
It is convenient to assign high randomness high information. Random patterns, however, supposedly present no meaning....
Aug18-14 08:14 AM
1 216
Hi everyone! Just wondering why when light hits glass it can pass through and be reflected at the same time. I'd like...
Aug28-14 08:24 AM
2 216
What does spectral response mean in context of filters and delay lines?
Jun12-14 08:14 AM
1 217
Hi guys, I have been wrecking my brains thinking bout this for quite some time, so I decided to get some help here :D...
Aug14-14 07:35 AM
Doc Al
1 218
This is a fun, easy and super kid friendly experiment. Now, what exactly is happening here? :) rqQSlEViNpk
Aug16-14 09:52 AM
1 219
For a science fair experiment me and my partner are working on creating plasma in a microwave.Our hypothesis is that...
Aug21-14 02:25 AM
2 219
I know that we aren't touching anything because atoms are repelling because electron can't touch each other. What...
Aug28-14 08:18 PM
1 219
Hey, I'm looking at amplitude decrease of a seismic pulse as a result of geometrical spreading. Starting with I...
Aug3-14 10:18 PM
Andrew Mason
1 220
Would anyone have a different explanation and maybe an example of radiation flux? Here is the Wikipedia definition...
Aug5-14 03:07 PM
3 220
How does the flap angle affect lift to drag ratio of a wing?
Aug12-14 08:21 AM
1 220
I saw a YouTube video where someone took nichrome wire and a high voltage source and managed to light a whole series...
Aug18-14 10:44 AM
2 220
If I introduce a gas into closed vacuum system at a known rate lets say 10 SCCM there will be a subsequent pressure...
Aug27-14 11:27 AM
1 220
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
1 221
Can you please tell me whether I am right or wrong? Lagrangians are scalars. They are NOT invariant under...
Jan18-14 01:26 PM
0 221
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
0 221
Hello (and sorry for this stupid question), Could someone tell me the name of this Hamiltonian H =...
Jul29-14 09:26 AM
5 221
I'm a high school student who wants to do a research project in physics (with school funding). I can program well, so...
Aug26-14 01:13 AM
Simon Bridge
1 221
Hi people, I just found out that the famous Feynman Lectures on Physics are now online, so I'm going through them...
Aug30-14 09:52 AM
2 221
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
1 222
I have been always passioned about human cognition. I would like to dedicate this post so that everyone can tell what...
Aug25-14 12:32 AM
2 222
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
5 223
I am trying to experimentally derive the drag equation. I have dropped coffee filters with varying masses and...
Y 06:45 PM
9 223
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
3 224
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
2 224
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
1 224
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
0 224
According to Pascal Law, when there is an increase in pressure at any point in a confined fluid, there is an equal...
Aug19-14 06:06 AM
4 224
I don't understand why we would weigh less at earth's center(as opposed to sea level). Looking around the net, I have...
T 12:02 PM
8 224

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