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6
votes
A clear case of "abusing dimensional analysis". Perhaps not the first time that a physics stack-exchange question is answered by xkcd:
answered Jul 27 '14 by Johannes
1
vote
1answer
The numerical coincidence that triggered Dirac to postulate his Large Number Hypothesis can be summarized by expressing the proton-electron gravitational angular momentum in units $\hbar c$: $$\frac{ …
asked Aug 19 '13 by Johannes
18
votes
Bob: Alice, tell me, why do the fundamental constants have the value they have? Why is the speed of light what it is? Alice: That is not a very meaningful question. Bob: What do you mean? Alice: P …
answered Nov 3 '14 by Johannes
20
votes
Tom, would you have asked the question "why is the speed of light 1 ls/s" if we happened to measure distance in lightseconds and time in seconds? The true answer to your question is: the speed of lig …
answered Jan 23 '11 by Johannes
2
votes
When describing the formation of a black hole (or the merger of two equally-sized black holes) in a Newtonian gravity framework, Planck-scale gravitational forces of the order $c^4/G$ enter into the d …
answered Apr 9 '16 by Johannes