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May25-09 10:31 AM ZapperZ 

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General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
2 63,523
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
166 159,925
I'm not sure how to put it, but recently its been happening, so far around 3 times, i leave a glass or a...
Sep13-12 04:43 AM
33 2,690
Hi, I am using thie χ2 test to fit a dataset in order to calibrate a sensor. \chi^{2} = \sum_{i}{{\left(y_{i} -...
Sep13-12 09:43 AM
egon ll
0 566
Not sure where to post this or if this can be solved, but I couldn't figure it out because math and physics are...
Sep13-12 10:16 AM
5 1,216
Can we earth ground AC and DC voltage? would this effect the components on the system?
Sep13-12 10:57 AM
8 1,219
While boiling water, I was thinking: Would one liter of water boil faster or slower if I boil it all at the same time,...
Sep13-12 11:09 AM
3 711
hi All, I got to thinking recently about diffraction; through an opaque slit for example, causes a normal...
Sep13-12 12:19 PM
2 638
Dear All I want to know the formula to extract the longitude of the satellite from the TLE below. I hope someone...
Sep13-12 03:34 PM
1 987
I have no idea what angle it's talking about and also what angle im supposed to get in this problem. It seems to me...
Sep13-12 04:12 PM
3 1,915
I have to do some dataacquisition from a car with some accelerometers. 4 accelerometers is placed on the wheels...
Sep13-12 06:04 PM
1 1,254
Hello for adiabatic process, pVγ=const What is the physical meaning of the constant at the Rhs of this...
Sep13-12 08:12 PM
10 1,257
I have a few questions that share a similar theme. 1) Is wind just fast-moving air particles? 2) When you're in...
Sep13-12 08:37 PM
15 1,763
what happens to the atoms in water when it is compressed so much that all atoms have no space to move? im guessing...
Sep13-12 09:29 PM
2 565
OK, a couple of things. 1. I know there are a few theories of "why" gravity exists with gravitons and entropy, etc....
Sep13-12 09:42 PM
1 611
Ive asked this question so many times on various forums and i feel there is a simple answer that i just havent heard...
Sep14-12 06:41 AM
17 2,243
what is the relation between Specific Heat and Absolute Temperature of any material ? Specifically, Sodium. Cp vs...
Sep14-12 08:37 AM
1 501
Hey guys, I was just reading an article on a patent Michael Jackson had under his name for one of his "anti-gravity"...
Sep14-12 09:23 AM
3 717
i had a question PV=nRT is the V the volume of the container or the gas and if it was the container and i had a...
Sep14-12 10:11 AM
3 557
Do you think that matter, energy, space, time, etc. are discrete, or continuous? If they are discrete, is...
Sep14-12 11:08 AM
17 1,652
If the world was frictionless, would the Earth orbit underneath your feet? Would buildings and things attached to the...
Sep14-12 04:08 PM
20 1,988
Scientists say that in mathematical terms in singularity all the math breaks down and you get infinity. But how come...
Sep14-12 09:24 PM
6 736
Hi, I realize that this might be kind of a silly question, but I am in a physics class currently and I'm having the...
Sep14-12 10:35 PM
Simon Bridge
1 772
Hi,I don know if my question will be clear,but I will try it.So,I m wondering how was derive this equation:...
Sep15-12 04:06 AM
0 538
We just went over Faraday's law in class and our teacher stressed how a changing flux is needed to induce an emf in...
Sep15-12 04:38 AM
5 1,180
I've read his book and he talks about AC current frequencies of incredibly high magnitudes. How was this achieved?...
Sep15-12 05:14 AM
3 663
Would anyone be able to help me wire up a single phase syncronous motor with a phasing capacitor to the mains? The...
Sep15-12 08:04 AM
0 800
Im really stuck and I would be grateful if someone could give me formula related to a mass that lies on a geodesic...
Sep15-12 09:49 AM
0 642
Greetings, this is my first post, though I have been reading these forums for a while. I understand that the...
Sep15-12 10:13 AM
5 846
Recently I have been involved in a car accident, and would like to figure out what was the speed of the other car that...
Sep15-12 12:25 PM
4 737
This may at first seem like a very stupid question, but I can't seem to get to the root of magnetism. As we all...
Sep15-12 01:30 PM
19 2,271
Hi everyone! I cannot find anywhere the Huygens Steiner Theorem proof, can somebody explain me this proof ?
Sep15-12 04:42 PM
0 489
I have two fishing lines that are of the same material but one has a larger cross sectional area than the other, which...
Sep15-12 06:26 PM
12 1,119
If I am stationary and a sound source moves towards me at a constant velocity, I will hear it (the sound) increase in...
Sep15-12 09:21 PM
4 940
What is the difference between raman-spectroscopy and usual spectroscopy?
Sep15-12 11:56 PM
1 591
This is possibly an engineering, rather than physics, question. (Ooooooooo! Busted!) John picks up a paperclip and...
Sep16-12 02:03 AM
1 434
Not sure where better to place this thread, here or gr. Is there direct evidence photons attract one another...
Sep16-12 03:00 AM
55 6,828
Hello everyone, These days i am studying thermal physics in my classes so had a few queries to get clear about. ...
Sep16-12 09:31 AM
27 2,356
1. Are these two the same? I'm not sure. Sometimes my teacher labels the Y axis with a Delta Displacement . Other...
Sep16-12 01:55 PM
Simon Bridge
1 1,412
Hello, I was thinking of the following question: suppose we have a body in two-dimensional space and its density is...
Sep16-12 03:10 PM
Simon Bridge
3 659
Ok,lets say an object is moving at a constant speed of Mach 7 for 20000ft. The weight for the object is 2000 lbs. ...
Sep16-12 03:51 PM
4 661
And why is it parallel? Do we actually know what causes magnetism at all?
Sep16-12 04:21 PM
2 764

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