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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
168 190,869
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 70,639
Hello; Quick question for anyone who knows a bit about radiation... So, Io puts out a lot of gas which turns into...
Jul12-11 08:09 AM
daveb
6 1,770
Hello, Quick question: Let's say you have a large open oceanic area with no wind... The sun's radiation hits the...
Jul12-11 03:51 AM
verb
8 1,909
I've been thinking about this simple problem a lot lately and it has been bugging me. Let's say you have a meter...
Jul11-11 11:07 PM
ngc1333
11 1,856
Hi, First of all I'm sorry for choosing the "general physics" forum, but I didn't find anything better suited. I...
Jul11-11 08:43 PM
Gestahl
22 4,524
i mean what more are coherent waves except 'having constant phase differnce'?i mean it is nt necessay for them to be...
Jul11-11 07:09 PM
Drakkith
1 1,361
i mean i know particles move up and down but i want to go into a bit more detail.consider a constant fequency wave...
Jul11-11 06:44 PM
nasu
1 928
I've been writing a lot recently about whether the reason for the increase of entropy over time (i.e. the second law...
Jul11-11 06:06 PM
edevere
0 1,843
Hi. Knowing the LRV, heat source and all other relevant details, how can we deduce the exact temp rise with black...
Jul11-11 04:33 PM
turbo
6 2,758
A comment in another thread led me to think about an experiment which can hopefully test the validity of the pointing...
Jul11-11 03:18 PM
Per Oni
5 1,470
drunken musings..... if i was sat on the wing of a jet travelling at mach2 would i be able to hear the the noise of...
Jul11-11 02:14 PM
rcgldr
13 2,130
It seems it is predicted by both classical and quantum physics. Why is it predicted in the first place? Is it purely...
Jul11-11 02:03 PM
xlines
2 1,267
For the question: A 435 n box is sliding down a 40.00 inclined. If the acceleration of the box is 0.250m/s2. Which...
Jul11-11 12:02 PM
Jus' me
2 6,992
The ideal gas law staes that pressure is inversely proportional to volume. Makes sense but I am confused by what...
Jul11-11 08:40 AM
russ_watters
2 1,678
i am working on GE GAS TURBINE's Torque converter beginners understanding ... em so confused into a clutch and torque...
Jul11-11 05:55 AM
SteamKing
2 2,405
So let's say you have water flowing at a given speed. Ballpark, how much force can be produced with a given surface...
Jul11-11 05:00 AM
srivi
2 1,780
How might one try to separate water from air at high temperature (say, 75degC) - if the gas if fully saturated? I...
Jul11-11 04:11 AM
parislad
6 2,079
I'm sure most of you on this board know what the VASIMR plasma rocket engine that is being prepared to be tested on...
Jul10-11 10:18 PM
JoeOh
0 1,315
So I'm degasing a solution in a glovebox. The way we did it is get a rubber septum that can cover the bottle opening....
Jul10-11 05:01 PM
LogicX
2 1,351
Hello. I've had this idea floating around in my head for a long time and lately it's really been bugging me. Say...
Jul10-11 03:20 PM
Redbelly98
16 15,514
This question of 2wd vs 4wd in a drag race has bugged me for a bit and I was wondering if my conclusion makes scene....
Jul10-11 06:55 AM
hari00968
19 8,493
I was thinking of a problem on my own when I came upon an entirely new idea. Assume that a force(call it air...
Jul10-11 04:39 AM
Drakkith
5 1,383
Imagine you are in a dark field. A man with a flashlight is looking for you. you sse the light from his flashlight. ...
Jul10-11 03:59 AM
Drakkith
4 1,623
If we where to make a wireless phone call to a planet 1 light year away the lag/time delay would be 1 year. They...
Jul10-11 01:29 AM
davenn
4 1,144
When I am looking with my sunglasses to PC display I see darker image.Then I turn my head 45 degrees and I do not see...
Jul10-11 01:04 AM
Fun Value
4 1,220
I was watching my friends smoke hookah last night thinking about how it works. I drew this simplified figure to help ...
Jul9-11 10:02 PM
jjustinn
5 6,443
Can somebody simplify me the relation of Pressure and Velocity ... Bernoullis theorem is Ok ... But Please simple and...
Jul9-11 07:48 PM
klimatos
1 975
Electromagnetic waves, aka light and such. What is it?. I know that it is a wave of energy, magnetic and electric...
Jul9-11 06:12 PM
omega_minus
18 10,055
Current and charge do not increase or decrease or get used up when going through a wire or other device. The amount of...
Jul9-11 03:25 PM
Per Oni
65 6,082
I have a question about gravity. Why do we think that gravity is caused by a specific particle. Why isn't gravity...
Jul9-11 03:24 PM
Nabeshin
1 1,518
I am trying to work with the simplified Bernoulli equation to determine how to convert a drop in flow velocity across...
Jul9-11 11:04 AM
ssavader
4 7,154
We have learnt that for the same aperture, waves with longer wavelength diffract more than shorter waves when passing...
Jul9-11 09:18 AM
Dadface
1 1,042
i got an assignment for physics and my class hasn't done alot of vertical motion yet, it sounds like a pretty traight...
Jul9-11 04:14 AM
Elviklemon
6 1,566
Hello, When calculating the dynamic structure factor I need to express \rho(q) in terms of creation and...
Jul9-11 01:27 AM
a2009
0 901
Hello I am currently building a water rocket. I would like some help on finding the equation for the force that is...
Jul8-11 10:30 PM
Jagella
4 1,331
I was thinking about the analogy of an observer living in a two dimensional world. So as it goes, this observer would...
Jul8-11 08:48 PM
avemt1
16 2,086
I am trying to get the most complete picture of the structure of atom. I understand generally how elements and...
Jul8-11 07:54 PM
Drakkith
2 1,511
Hi, this really isn't a homework problem - it's posed in a text book I am using to revise having not used physics for...
Jul8-11 04:40 PM
sophiecentaur
9 11,517
In trying to understand electricity I thought of the following: If I set up a wire one light year long, stretching out...
Jul8-11 02:12 PM
NightSwimmer
44 5,358
air, glass, mica, rubber, water, etc all are insulators because they don't have free charges to carry the current.......
Jul8-11 11:27 AM
girlzrule786
10 3,783
Hello I am taking some measurements with a spectroscopic ellipsometer, a measurement technique with which I have...
Jul8-11 11:11 AM
momar
0 769

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