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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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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
166 160,181
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
2 63,616
i really need IP topics which dont need more money and can be worked for a short time. im a 4th year student. ...
Sep6-08 07:27 AM
2 3,270
Hi all,i am extremely sorry that i am asking a very basic question,The unit of sound/noise is decibels,but unit of...
Sep6-08 06:14 AM
Doc Al
1 1,301
On Aug 30, 7:44 pm, "Juan R. González-Álvarez" <> wrote: > It seems to me that,...
Sep6-08 05:00 AM
Igor Khavkine
0 949
On 29 Авг, 05:27, Ian Parker <> wrote: > On 28 Aug, 04:29, wrote: > > So you...
Sep6-08 05:00 AM
16 1,653
======== Welcome! to the Physics Newsgroups ========== The sci.physics.* and alt.sci.physics.* newsgroups are...
Sep6-08 05:00 AM
N:dlzc D:aol T:com \(dlzc\)
0 464
On Fri, 29 Aug 2008 12:12:57 +0000 (UTC), Chalky <> wrote: >On Aug 29, 3:27 am, John...
Sep6-08 05:00 AM
John Polasek
18 1,105
"" wrote: > > Is there any method to determine concentration of Carbon dioxide > dissolved...
Sep6-08 05:00 AM
Uncle Al
2 1,944
Henrique de Andrade Gomes wrote: > I have a very simple question, does anyone know if the integral of the > scalar...
Sep6-08 05:00 AM
Marc Nardmann
1 1,119
Also available at August 30, 2008 This Week's Finds in Mathematical...
Sep6-08 05:00 AM
John Baez
0 282
I understand the principles behind recording the holograph, that we are using interference to record phase information...
Sep6-08 04:24 AM
11 7,123
Hi all,actually i want to discuss about standing wave. Its little bit confusing to me.As a simple defintion,when two...
Sep6-08 03:49 AM
5 1,024
Hi guys, Recently i had noticed that when i left the hot water in the shower on for a while, the mirrors would fog...
Sep6-08 02:03 AM
2 908
I have a question concerning scalar invariance with respect to an accelerating and an inertial reference frame. Here...
Sep6-08 12:14 AM
0 1,786
I am curious to hear people's opinions and to run a poll on the use of the term electrodynamics vs. the term...
Sep5-08 10:03 PM
0 1,975
One book about Chaos says that we can use the decrease of the information of the system to define whether the system...
Sep5-08 05:58 PM
3 1,119
we have a physics fair next week and we have an activity. my professor told us to build a cannon that uses a...
Sep5-08 07:13 AM
0 2,132
To reiterate the question, can the method of cooling an object down with the Bose-Einstein Condensate reach absolute...
Sep4-08 09:46 PM
Andy Resnick
1 990
Can someone please help me understand how to calculate the displacement of 3 different directions and distances?
Sep4-08 09:34 PM
2 1,246
i was wondering since radiation is a form of light if it could be converted into electricity using a photovoltaic...
Sep4-08 05:15 PM
3 1,018
And why can't food be cooked with X-rays or radio waves?
Sep4-08 05:07 PM
26 3,128
escape velocity is defined in resnick,halliday,walker as 'the certain minimum initial speed that will cause it to move...
Sep4-08 04:50 PM
49 8,046
I looking for a software which can optimize thermodynamic (power or refrigeration) cycle. Generally cycle consists of...
Sep4-08 10:22 AM
0 2,941
im new to the physics world and know this is probably an easy problem but i dont know where to start Hold a pencil...
Sep4-08 10:09 AM
1 858
Suppose an object is thrown onto the sky from the surface of the earth. After it reaches certain height, earth...
Sep3-08 07:36 PM
1 1,321
I need to convert the earth's radius of 6.37 x 10^6 in to the km, But I need it to be the circumference in km. I...
Sep3-08 04:41 PM
4 1,075
If we reject the notion of fundamental dimensionful constants and interpret the constants h-bar, c and G as rescaling...
Sep3-08 02:39 PM
Count Iblis
0 726
Hi, So my former knowledge of electricity and its movements made me understand that only electrons move from the...
Sep3-08 12:33 PM
16 2,738
Is it possible to construct 2 devices which simultaneously generate (the same) random bits indefinitely? No matter how...
Sep3-08 11:21 AM
2 982
How to ionize He to He 2? It is for a school resarch. I have the gas in a container. Thans.
Sep3-08 09:45 AM
0 1,167
(1)why is magnetic field generated when current is passed through a conductor? :confused: (2)why is current induced...
Sep3-08 09:20 AM
2 1,501
so im tearing my hair out with this one... the density of the earth's atmostsphere vaires with height r above the...
Sep3-08 07:29 AM
2 1,006
is there a relation between the density of a sphere spinning at a given rate and the degree by which the minor axis...
Sep3-08 06:41 AM
5 1,509
If I have some water in a thin (on the order of micrometer or nanometer even) cylinder, a meniscus will form due to...
Sep2-08 12:09 PM
Andy Resnick
4 1,320
I work in the automotive industry and some of the products we make are resonators for engines. I always hear talk...
Sep2-08 11:44 AM
1 944
I'm a newbee here and have read some of the posts about light photons having no mass. I have a question/comments that...
Sep2-08 11:05 AM
1 932
The wavelength of the light and the width of the distance between the slits affects the pattern of the two slit...
Sep2-08 07:25 AM
Andy Resnick
2 1,508
This is the basic Wiki definition of angular momentum. I was wondering if someone "perhapse a teacher" could put this...
Sep1-08 11:48 PM
2 866
Friction between 2 surfaces is independant of the area of contact and depends only on the nature of the two materials...
Sep1-08 11:27 PM
5 8,058
The Compton's Apparatus is not good enough of an explanation. I would like to know at a fundamental level the...
Sep1-08 06:23 PM
10 1,152
Hi, I'm just trying to find out if there is a calculation to that relates deviation from a straight line to the...
Sep1-08 04:47 PM
2 1,509

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