Sub-Forums : General Physics Search this Forum
New Posts
Quality answers to common physics questions
May25-09 10:31 AM ZapperZ 

Register to Post Thread

General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
RSS Feed Icon Search this Forum
Meta Thread / Thread Starter Last Post Replies Views
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Apr8-14 10:13 AM
ZapperZ
166 160,126
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 63,598
I know how, by Amp\grave{e}re's Law for the loop integral of a magnetic field, $$\oint_C \textbf B \cdot d \textbf s =...
Feb5-13 11:17 PM
elfmotat
1 480
Hi, just a simple question. We've always been told that microwave ovens are dangerous and to not stand near them when...
Feb5-13 07:58 PM
JimiJams
8 851
In high school, I learned that coherent light is light which has same frequency,phase and so on. In college , I learn...
Feb5-13 06:34 PM
einstein1921
15 1,454
Hey..!Its been a long time since I last posted..Any how I returned.. My question is about mEta stable states in atoms...
Feb5-13 03:00 PM
mathman
1 405
Hi, I have a question regarding frequency, power... Let's say I have signal with power level of X dBm and the...
Feb5-13 12:13 PM
berkeman
1 677
When an object move in space, what decides where it moves to? For instance there's no rule saying you can't move from...
Feb5-13 11:24 AM
fredreload
32 2,569
How can an incident photon cause an atom to de excite??
Feb5-13 11:17 AM
Jano L.
1 347
I read the following in a book. “In order for there to be a clear image on your retina, the eye must refract the...
Feb5-13 09:26 AM
snorkack
4 681
In a general situation, how do you change origin (mathematically speaking) in a physical context i.e. with position...
Feb5-13 07:38 AM
qwop
2 404
I am doing a project on piezoelectricty and i need to know where to get piezo disks that will have this effect...
Feb5-13 07:28 AM
jedishrfu
1 366
I need more help understanding Fourier Transforms. I know that they transform a function from the time domain to the...
Feb5-13 06:42 AM
pellman
1 530
Is it possible that an electron of the 2s orbit fills the gap in 1s after electron capture? i believe no and it has...
Feb5-13 02:54 AM
sankalpmittal
1 447
One of stokes relation is that r=r'. What does this mean exactly? Is the phase difference between incident beam and...
Feb5-13 02:51 AM
sankalpmittal
1 493
Most textbooks list the real part of the index of refraction. How would I go about calculating the imaginary part of...
Feb5-13 01:54 AM
DrDu
1 637
Hi Guys Wondered if you could help me. Say a high energy electron (low wavelength?) is fired through an...
Feb4-13 09:43 PM
phyky
6 1,629
As far as I understand it... Each satellite transmits a signal that the receiver receives. This signal consists of...
Feb4-13 08:13 PM
davenn
3 645
It is usually written that the speed of light in a dielectric medium is ##v=\frac{c}{\sqrt{\epsilon_r}}##, where ##c##...
Feb4-13 05:37 PM
WhiteHaired
2 1,100
If you have one high energy photon and you collect it together with another, does there energy combined into one high...
Feb4-13 03:47 PM
big_bounce
8 484
Why is charge a derived quantity????
Feb4-13 03:09 PM
mc2_phy
6 925
I was wondering what voltage or current, if any, would be produced if the basic magnet through a copper coil ...
Feb4-13 02:57 PM
mfb
1 461
Hey all, Anyone know if there is a δt to Compton scattering or is it an instantaneous event, entertaining classical...
Feb4-13 02:31 PM
IxRxPhysicist
4 540
what is the relationship between these 3 Charge Capacitance voltage??????
Feb4-13 01:45 PM
AbsoluteZer0
2 507
Physics noob here. I was wondering, is there a way to measure time delay between the movement of one part of an atom...
Feb4-13 12:33 PM
ZapperZ
5 572
I was wondering if anyone would have a link to, or have, a diagram showing light wave diffraction at an obstacle? ...
Feb4-13 11:19 AM
jtbell
3 589
Hello Can someone explain what it is about typical household mirrors (eg. for grooming use) that allows them to...
Feb4-13 10:42 AM
Alkim
9 940
Hello all. This is my first post and I wasn't exactly sure where to put it, so I apologize if it could be in a better...
Feb4-13 10:26 AM
Andy Resnick
2 697
Hi, I am doing an university project that consists in building a robot that operates in a AC to DC convertor. The...
Feb4-13 10:08 AM
sophiecentaur
12 972
I was watching a video on YouTube called 'How Much Does A Shadow Weigh?' and towards the end, the following question...
Feb4-13 09:02 AM
russ_watters
16 1,670
If we had the capacity to measure masses this small: Would a candle in a closed jar be just as heavy as identical...
Feb4-13 04:03 AM
A.T.
5 504
To find average velocity, you do total displacement over total time To find average speed, you add up the speeds /...
Feb4-13 02:06 AM
NascentOxygen
4 529
I am looking to do some experimentation with x-ray imaging of non-living materials, and need advice on how to do it...
Feb3-13 10:56 PM
Drakkith
3 409
how do i wire this disk with the detectors
Feb3-13 05:25 PM
CWatters
1 419
A string with a density/length of rho and tension T has an elastic spring with stiffness k at x=0. There is a step...
Feb3-13 04:12 PM
artongue
1 448
What is the difference between the two ? Maybe that in the photoelectric effect all of the energy of a photon is...
Feb3-13 02:57 PM
Graniar
8 1,186
Energy gravitates. Is is so simple as to replace M in gravitational euqations with E/c*c ? ...
Feb3-13 01:10 PM
Khashishi
4 380
The width of a pulse is typically given in the time domain, correct? The effective width is the term to describe this....
Feb3-13 12:48 PM
Alkim
3 346
Hello I have some questions regarding the following problem: Imagine I have a glass beaker partially filled with...
Feb3-13 12:37 PM
Alkim
4 636
Hello, I'm trying to analyze the RC circuit... specifically a low-pass filter, so the set up is voltage source to...
Feb3-13 11:07 AM
schaefera
4 424
If a ball is thrown upward with velocity of 1m/s, is vx = 0 while vy= 1?
Feb3-13 10:28 AM
sophiecentaur
5 412
why is it a derived quantity?
Feb3-13 10:17 AM
Drakkith
6 762

Register to Post Thread
Bookmark and Share

Display Options for General Physics Mentors
Showing threads 4001 to 4040 of 36375 Mentors : 3
 
Forum Tools Search this Forum
Search this Forum :
 
Advanced Search