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visits member for 4 years, 2 months
seen 16 hours ago

Mar
25
asked What was Feynman's famous formula?
Mar
20
accepted Quantum version of the Galton Board
Mar
20
awarded  Inquisitive
Mar
17
asked Do photons with a frequency of less than 1 Hz exist?
Mar
17
comment What was the amount of energy released in the 9/11 terrorist attacks?
I see what you want to say: en.wikipedia.org/wiki/Orders_of_magnitude_%28energy%29 .
Mar
17
answered What was the amount of energy released in the 9/11 terrorist attacks?
Mar
16
asked What was the amount of energy released in the 9/11 terrorist attacks?
Mar
7
comment Why is the imaginary unit conventionally put on the right hand side of commutation relations?
I believe this question is more than just about convention. It touches also the question whether a "pure" commutator $[a,b]$ is actually a physical meaningful quantity or not. I believe it is not, because it is a complex quantity and not an observable. But I could be wrong, there might be other important reasons why relations between complex quantities like commutator relations are still of interest in QM and that is why I asked the question.
Mar
7
asked Why is the imaginary unit conventionally put on the right hand side of commutation relations?
Mar
2
comment How can it be that the beginning universe had a high temperature and a low entropy at the same time?
Unfortunately the link to the paper is dead. Is this the article you are talking about : Davies, Cosmological dissipative structure, International Journal of Theoretical Physics September 1989, Volume 28, Issue 9, pp 1051-1066 ?
Mar
2
awarded  Popular Question
Feb
25
awarded  Notable Question
Jan
28
awarded  Yearling
Jan
27
comment Good book on the history of Quantum Mechanics?
I believe this is the correct reference for D. J. Candlin: On sums over trajectories for systems with Fermi statistics: Il Nuovo Cimento, 1956, Volume 4, Number 2, Page 231 (DOI: 10.1007/BF02745446)
Dec
25
awarded  Notable Question
Nov
10
awarded  Popular Question
Oct
15
asked Can the High beta fusion reactor work?
Aug
15
comment Is thermodynamic free energy and potential energy the same thing?
Can one say that thermodynamic free energy is the same as potential energy in the limit when the number of particles N -> 1?
Jul
20
comment Homemade salad dressing separates into layers after it sits for a while. Why doesn't this violate the 2nd law of thermodynamics?
I think this could also happen without friction. The selfgravity of the balls would make them clump together , if their initial speed is not too high (see en.wikipedia.org/wiki/Jeans_instability). Does that mean that for a selfgravitating system a clumped/ordered state can be the one with the highest entropy?
Jul
19
asked Is thermodynamic free energy and potential energy the same thing?