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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
2 71,138
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Sep5-14 05:07 PM
170 192,049
What does living in exponential times mean?
Oct21-13 08:37 AM
5 218
Q1.when transistor is in saturated state ,then,in output characteristic curve on increasing voltage across collector...
Jul24-14 04:30 AM
0 218
Why does "per" in 3 miles per hour mean division? Why are gradients and rates a ratio?
Jul29-14 04:52 AM
3 218
How can velocity uniformity in dynamos and motors be explained? What's the mechanism of that happening ? I'm...
Jul31-14 09:53 PM
Simon Bridge
1 218
Does the vector potential have physical significance or is it just a mathematical tool? What is your interpretation of...
Aug1-14 09:28 AM
1 218
How would one go about figuring out what to dope a diodes pn junction with in order to create a desired...
Aug20-14 11:38 PM
3 219
So I have been researching the relation between voltage, amperage and ion drift distance. There are a few articles...
Sep3-14 12:04 AM
Hawk Eyes
0 219
What does spectral response mean in context of filters and delay lines?
Jun12-14 08:14 AM
1 220 Happy to have any comments on this. Eric
Sep12-14 06:51 PM
3 220
When a para magnetic substance is brought near a north pole or a south pole of a bar magnet it experiences...
Jul31-14 12:26 PM
1 222
Hello I just want to ask why do we bias the photodetector before starting any setup? Thank you
Aug9-14 04:01 AM
4 222
Hi A horn vibrating at ultrasonic frequency (20 kHz) is immersed in a liquid. The bottom end of the horn, which is...
Sep8-14 10:41 AM
0 222
When the light from a distant star comes to our the photons transverse the distance...are they traveling as...
Sep12-14 09:56 AM
2 223
Hi all, I in my text they first did a phasor-diagram solution to a series LCR circuit and brought Z= under root of...
Sep7-14 01:52 PM
0 223
This is what I got after watching some documentaries: Acording to the general theory of relativity, gravity is...
Y 01:55 PM
2 223
The (perfect) circle, defined in the Cartesian coordinates as the set of (x,y) pairs that fit the equation x^2 + y^2 =...
T 12:20 AM
12 225
Can someone please explain the lift coefficient and drag coefficient in simple terms? Thanks.
Aug17-14 05:27 AM
1 225
Can you please tell me whether I am right or wrong? Lagrangians are scalars. They are NOT invariant under...
Jan18-14 01:26 PM
0 226
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
0 226
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
1 227
Can combining a magnifying glass and a prism make a rainbow capable of ignition?
Aug2-14 08:16 PM
1 227
I was working problem 3.5 out of Hartle's "Gravity" and have come to a bit of confusion. The problem states that the...
Sep2-14 07:29 PM
0 228
why lithium is good for battery's. .....what the property's for lithium...
Aug8-14 08:38 PM
1 229
It is convenient to assign high randomness high information. Random patterns, however, supposedly present no meaning....
Aug18-14 08:14 AM
1 229
So a few nights ago I was on 9gag and stumbled upon this post: I would really like...
Sep1-14 05:05 PM
Vanadium 50
3 229
Hello! I am new here! I need your help... How would I draw a simple diagram to show how static electricity is made...
Sep1-14 04:42 PM
2 229
So the equation to obtain the frequency of the modes of a square membrane is something like ω m,n = ∏ ^(1/2) ...
Sep12-14 06:56 PM
3 229
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
2 230
Can someone give me tips? I want to know the gravity effects on the electric motor's rpm. Is there or not? If there is...
Feb18-14 11:24 PM
1 231
What happens when we connect two batteries in series with a earthed wire in between with an op-amp? How does the...
Apr9-14 02:22 AM
Miraj Kayastha
0 231
Is Average Speed a Scalar quantity?
Sep12-14 04:31 PM
3 231
Hi! I want to conduct an experiment to investigate the effect of sucrose concentration on refractive index using a...
Aug6-14 05:04 AM
2 232
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
3 232
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
2 232
When waves are propagated through medium, the displacement curve will move up and down. Do they have any relationship...
Sep6-14 01:50 AM
Jackson Lee
2 232
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
1 233
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
1 233
Would anyone have a different explanation and maybe an example of radiation flux? Here is the Wikipedia definition...
Aug5-14 03:07 PM
3 233
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
1 233
The lecturer did not explain this for some reason. Assuming that we have a gass where all the particles have a...
Sep12-14 06:42 PM
1 234

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