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 Yearling
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Jan
22
comment Why doesn’t the Sagnac Effect disprove relativity?
@JohnDuffield What is the difference between "the measured speed of light" and "the speed of light"?
Jan
22
comment Why doesn’t the Sagnac Effect disprove relativity?
Special or General Relativity or both?
Jan
22
comment Why doesn’t the Sagnac Effect disprove relativity?
@JohnDuffield At the very beginning of his "On the Electrodynamics of Moving Bodies," the paper in which he gives SR's fundamental assumptions, he writes: "In agreement with experience we further assume the quantity [c] to be a universal constant—the velocity of light in empty space." (I §1). How does Sagnac agree with this assumption?
Jan
21
comment Why doesn’t the Sagnac Effect disprove relativity?
@JohnDuffield So Sagnac only disproves special relativity? Special relativity says the speed of light is constant in a vacuum.
Jan
20
comment Self-powered heat exchanger w/energy profit?
@CuriousOne There are two temperatures in the diagram.
Jan
11
accepted “Periodic Table” of Particles of the Standard Model?
Jan
10
awarded  Yearling
Jan
10
answered Translated publications of Boltzmann
Dec
29
comment Where does deleted information go?
@Adam Or perhaps there's no information at all…
Dec
29
comment Where does deleted information go?
@ssamuel "Data in modern computer systems aren't ever deleted in the sense described above" unless you use shred or something similar.
Dec
29
revised Thermodynamics equation that involves time?
clarified question and title
Dec
29
comment A mass falls to the ground from a height. What's the change of the entropy of the universe?
The thermodynamics of the universe as a whole is highly problematic. See, e.g., Kragh, Helge. “Pierre Duhem, Entropy, and Christian Faith.” Physics in Perspective 10, no. 4 (December 1, 2008): 379–95. doi:10.1007/s00016-007-0365-z.
Dec
29
suggested approved edit on Thermodynamics equation that involves time?
Dec
18
awarded  Autobiographer
Oct
6
awarded  Notable Question
Aug
29
comment Non-extensivity in a few body system
+1 for mentioning "nanothermodynamics"
Jul
11
answered Do we have a deeper understanding of Fermat's Principle?
Jul
11
comment What does 99.9% speed of light mean when there is no absolute velocity?
Could those who downvoted please give reasons why you downvoted?
Jun
16
comment Difference between a reversible change and a reversible process?
Perhaps you're asking about the difference between quasi-static and static?
Jun
10
awarded  Popular Question