Physics - physical laws, properties, etc

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jumping from a bridge	31 Oct 2004 21:33 GMT	17
when I jump off a bridge into water, how deep will I dive?
Stoke's Theorem	31 Oct 2004 21:31 GMT	1
How can Stoke's Theorem be used describe a succsession 2 dimensional surfaces, all causally connected? The surfaces would all be closed geometric forms. An example would be the 2 dimensional surface of a 3 dimensional sphere. The the succsessive surfaces would be iterations
Infrared Fluorescence...	31 Oct 2004 17:29 GMT	11
Does any one know a material or materials that are will a will absorb infrared radiation and re-emit a different wavelength? Is this possible in this band? Thanks for any replies:)
The Limitations of Mathematics in Physics	31 Oct 2004 16:40 GMT	3
The Limitations of Mathematics in Physics The present philosophy in theoretical physics is to search for mathematical relationships that predict experimental results that are then used to verify the validity of the mathematics in defining our physical Universe,
Do a spring gets warmer in use?	31 Oct 2004 16:18 GMT	9
Will a spring that is pushed and released repeatedly over a period of time, produce some heat, that will raise the average surrounding temperature? Or will it just get warmer and colder all the time, without adding to
Dumping energy	31 Oct 2004 16:10 GMT	1
Just suppose - I managed to cool a lump of polar slush into an iceberg by converting the molecular kinetic energy in the slush into electron movement round a circuit.
superstable voltage or current generation	31 Oct 2004 15:35 GMT	4
Does anyone know of any equipment out there capable of generating a constant voltage or constant current with an extreme time/temperature stability of about 10ppb (parts per bilion) or around? The power is not necessarily relevant. If not, any ideas?
Heisenberg uncertainty principle meanings	31 Oct 2004 15:32 GMT	33
I want to know if Heisenberg uncertainty principle means that add an observor can change the result? I know this is not an easy principle to understand. But is it the basic ideas? http://en.wikipedia.org/wiki/Uncertainty_principle
Music	31 Oct 2004 15:27 GMT	4
Have you ever notice when you play loud music on the stereo the windows or tables shake only when certain tones are hit on the music? My bookshelf seems to be very sensitive to a low D-flat, but even tones close to that don't register to it. Similarly the table next to it vibrates ...
Q: properties of covariance matrices	31 Oct 2004 15:13 GMT	6
Let x and y be n-tuplets of normally distributed random variables, and let C = cov(x,y') be the nxn covariance matrix of x and y. Let z be some fixed n-tuplet whose elements are all strictly positive. 1) Are all the elements of the n-vector, Cz, non-negative?
violation of microscopic reversibility	31 Oct 2004 14:53 GMT	1
If you want shitty teachers in science, spend $23,000 a year to go to Widener University in Pennsylvania. So long as the professors are Jews, the Administration loves them. The fact that they are the worst teachers around doesn't seem to matter. The Administration
The Value of Winter Humidification	31 Oct 2004 13:51 GMT	10
The question of humidifying a house in wintertime comes down to this: how much are you willing to pay not to have nosebleed. Bob Kolker
NASA Scientist Rips Bush on Global Warming	31 Oct 2004 09:02 GMT	1
NASA Scientist Rips Bush on Global Warming Forwarded message from fidyl@yahoo.com [ Subject: NASA Scientist Rips Bush on Global Warming [ From: fidyl@yahoo.com
Runaway greenhouse effect starts on Mother Earth	31 Oct 2004 06:20 GMT	42
Think positive .How can we use the heating of the planet to cut down on energy use? How about insulated wide pipes taking heat energy from the tropiocs to the industrial areas? excerpts Paul Brown, environment correspondent
AS OIL RISES, CLEANER ENERGY SURGES	31 Oct 2004 03:10 GMT	3
AS OIL RISES, CLEANER ENERGY SURGES Forwarded message from fidyl@yahoo.com [ Subject: As oil rises, cleaner energy surges [ From: fidyl@yahoo.com