Physics

Does a magnetic field rotate with a magnet...the answer!
From the time of Faraday the question has remained "does a magnetic field rotate with a rotating magnet? Rotate a cylindrical magnet on it's axis and the question is does the field move with the magnet? In other words in qV x B is relative motion between the test charge q and the "postion" of the magnetic field B (... 3 Mar 2010 05:10

Math problem for those interested in astronomy
If we were living near the center of our galaxy (the Milky Way) instead of in a remote suburb, would the night sky (illuminated by stars) be as bright as the day sky (illuminated by our sun)? The density of stars is 100,000 times higher in the center of our galaxy than where we are now. Also, closest stars (neare... 23 Feb 2010 02:28

Newspaper report confirms disappearance of matter
Tom Potter wrote: How can mass simply disappear??? What's that got to do woth guns, you senile old fuckwit? ... 23 Feb 2010 11:19

Indian scientist invents bloom box for electricity production
video http://www.wtsp.com/news/mostpop/story.aspx?storyid=125809&provider=top http://www.wtsp.com/news/mostpop/story.aspx?storyid=125809&provider=top One reason the companies have signed up is that in California 20 percent of the cost is subsidized by the state, and there's a 30 percent federal tax break becau... 2 Mar 2010 20:23

'Life After People' - For Real!
-----BEGIN PGP SIGNED MESSAGE----- As the pseudochristians and other Antichrist Atheists around the Fallen world scramble to avoid the imminent universal desolation, it's gratifying to watch this international Empire of Antichrist being universally destroyed more of flesh and bone than of walls and stone. And th... 22 Feb 2010 20:57

The very thoughts our minds combine ;)
The very thoughts our minds combine ;) ~Automutt What are words but the very thoughts our minds combine with sound to form our exceeding essence. The flow of language that gathers us all up and thrusts us forward into the ever expanding future of our lives. http://automutt.deviantart.com/ -- Hope you are h... 22 Feb 2010 10:45

First Germanium Laser
How did I miss this when it was first announced? http://web.mit.edu/newsoffice/2010/first-germanium-laser.html (seems awfully "dumb" for an MIT publication, or is it just me?) The lattice is under considerable strain, and ISTR past heat- management issues with Ge optics. Will these things be "real-world... 22 Feb 2010 05:15

true-boldface Vectors while handwriting?
in physics & math, boldfaced type is used to indicate that a quantity is a Vector. But when handwriting (as on a classroom blackboard), the convention is to put a line over the letter, as bolding handwriting is difficult. But is it impossible? Can there be any way to handwrite in true-bolding? ... 27 Feb 2010 09:55

lens equation of tilted mirror lens
Hi All I have a newbie question. I would like to find out what is the lens equation of the following optical setup. Specifically I would like to find out what is the effective focal length of such a setup. In a very simple periscope I have 2 mirrors tilted at 45 degrees. Now instead of planar mirrors, i have t... 22 Feb 2010 22:03

Two paths to a Type Ia supernova?
Common knowledge about what creates a Type Ia supernova is that a white dwarf siphons off matter from a companion star, usually a red giant. It siphons off so much matter that its mass goes over the Chandrasekhar limit (approx. 1.4 solar masses), and this creates a thermonuclear explosion so big that all of the... 14 Mar 2010 04:23