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A duck walks into a bar. Animal control is promptly called and the duck is released into a near by park.

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Sep
6
answered Difference between Hamiltonian in classical Mechanics and in quantum Mechanics
Aug
22
revised How long does it take plasma to radiate its heat?
gramma etsetera
Aug
22
suggested suggested edit on How long does it take plasma to radiate its heat?
Aug
19
comment How much energy would the Human Torch need?
Joke's on you, The Human Torch is pretty far from being human.
Aug
3
awarded  Popular Question
Jul
28
comment Is this really a golden ratio spiral?
Do you know what the object of your interest actually is? If no, search the web for a definition. Once you understand it, there will be no barrier to take the picture and test it yourself.
Jul
24
revised Bug riding on a ball moving at almost the speed of light
description?
Jul
24
suggested suggested edit on Bug riding on a ball moving at almost the speed of light
Jul
10
comment How can blackbody radition be explained by quantization?
Maybe this question relates as well.
Jul
8
comment Laplace operator's interpretation
@mcodesmart: don't worry.. it was fun!
Jul
7
comment English translation of Heisenberg's paper ``Über den anschaulichen Inhalt der quantentheoretischen Kinematik und Mechanik''
As a German speaking person, I'd like to add that I find the translation "actual content" a little debatable. It sounds harsher than "anschauliche Inhalt", which could be translated to "the content which can actually be visualized (maybe opposed to that which is formal but has not clear correspondence to something real)". In particular, "actual content" implies that the other half isn't proper content, while the German expression doesn't imply that.
Jul
2
comment Relationship between the continuity equation and the wave equation
Well, have you studied that free field theory on its own? Hint: If you define a trajectory by $x''=0$ in Newtons theory, then the kinetic energy is $\propto x'^2$ which you can also express via momenta $p\propto x'$ and by the way $p'=0$. If you're interested in $\partial^2\varphi=0$, the Lagrangian is $\propto (\partial \varphi)^2$ and now what you do is introducing the letter $J\propto\partial\varphi$.
Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious
Jun
21
comment Why does maximal entropy imply equilibrium?
Thanks for the response. Though my comment to Carl Brannens answer applies here too: In the first sentence of the question I say I consider the question from the point of view of pure thermodynamics, not arguing using the statistical physics model of it.
Jun
21
awarded  Notable Question
Jun
17
awarded  Nice Question
Jun
11
awarded  Favorite Question
Jun
5
comment Is quantum gravity, ignoring geometry, the theory of a fictitious force?
@JohnRennie: "Dear President Nixon: Your tenure has witnessed the rise of the VHS tape and string theory as a promising avenue to quantum gravity. Which one do you think will be persued longer?" :)
May
28
comment The path integral and Feynman diagrams
I think there is a history of science SE site now, where this seems to fit. Then again, I don't know who frequents this boards. To get to the question, since you ask how Feynman came to his conclusions, the answer surely lies in his knowledge and for this it's crucial to have a look what he worked on before: wikipedia.org/wiki/Wheeler-Feynman absorber theory.