What it's like to Travel on a Light Beam http://federation.g3z.com/Physics/index.htm#LightBeam (PDF, 105k) Maxwell’s equations, in the form actually published in his...

Computers are as important to modern scientists as test tubes, but we know surprisingly little about how scientists develop and use software in their research. To find out,...

In article , (Eric Flesch) writes: Entropy is said to always increase. But do not green plants reverse entropy? Seems...

Lubos Motl writes that "dead and alive cats have different gravitational fields." I wasn't sure if this was a joke. Is...

Not quite sure how to phrase this since it's a question I have ever seen asked... Is here a minimum amount of information/entropy/energy associated with the...

Are the contracted Christoffel Symbols vectors? A quick glance at the transformation properties of the Christoffel Symbols seems to suggest that the non-homogeneous part of...

Entropy is said to always increase. But do not green plants reverse entropy? Seems to me that everything they do increases order, down to the molecular level.

I understand the -simple- way of classifying partial differential equations when they are linear, and the conditions therein. However, I have been trying to understand how...

Hello, I have a question on rf heating in Paul trap. There are papers which say that in a Paul trap, the ion cloud eventually comes to a state of thermal equilibrium with...

Also available as http://math.ucr.edu/home/baez/week270.html October 11, 2008 This Week's Finds in Mathematical Physics (Week 270) John Baez Greg Egan has a new novel out,...

http://www.mazepath.com/uncleal/example.png Picture of the problem. A dense lattice is within the hollow of a closed lattice membrane Given: a chiral icosahedral (point...

Uncle Al schrieb: Eric Flesch wrote: Entropy is said to always increase. But do not green plants reverse entropy? Seems to me that everything they do increases...

Chris H. Fleming schrieb: On Sep 8, 6:50 am, Arnold Neumaier The mixed state is the most complete description of a system. ...

Also available as http://math.ucr.edu/home/baez/week270.html October 11, 2008 This Week's Finds in Mathematical Physics (Week 270) John Baez Greg Egan has a new novel out,...

Eric Flesch wrote: Entropy is said to always increase. But do not green plants reverse entropy? Seems to me that everything they do increases order, down to the...

After all, electrons and positrons are point particles too, and their collision produces a pure energy state with all quantum numbers zero, from which anything can come. So...

This is to announce the availability of a draft of a book Arnold Neumaier and Dennis Westra, Classical and Quantum Mechanics via Lie algebras, Cambridge...

Hi everyone: Has anyone looked at this paper by Claus Turtur. It is called a "A Motor driven by Electrostatic Forces". The paper is posted at philica.com. It should be...

First approximation of free electron in conductor can be a plane wave. So shouldn't there be more analogies from optics? Remember that single electron can go through two...

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