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  • 0 posts edited
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  • 55 votes cast
Oct
30
awarded  Nice Question
Sep
9
comment Eigenvalue for the creation operator for a coherent state
"you can quickly see" is good, but sometimes it's helpful to have things spelled out fully. I found this answer useful.
Mar
1
awarded  Notable Question
Jun
3
awarded  Popular Question
Nov
3
awarded  Yearling
Apr
22
awarded  Enlightened
Apr
22
awarded  Nice Answer
Nov
3
awarded  Yearling
Mar
28
comment Definitions and usage of Covariant, Form-invariant & Invariant?
I agree that the components of the Riemann tensor or Einstein's equations (as in GR) are covariant, maybe I miss-interpreted the question as to how it relates to "Einstein's relativistic laws" maybe the missing part was important to specify which laws.
Mar
28
revised What methods can astronomers use to find a black hole?
corrected a typo in the question title.
Mar
28
answered Definitions and usage of Covariant, Form-invariant & Invariant?
Feb
10
awarded  Citizen Patrol
Jan
5
awarded  Enlightened
Dec
11
awarded  Quorum
Nov
25
comment Why do earphone wires always get tangled up in pocket?
@belisarius, curly hair, on the scale of the width of the hair is still approximately straight, so yes I'd say it still holds.
Nov
24
awarded  Commentator
Nov
24
comment Does leaning (banking) help cause turning on a bicycle?
Seems to me the gyroscopic effect should have something to do with how the bike steers, however I just read part of an article suggesting this wasn't the case. I did write an answer for this but deleted it when I realised it may be wrong.
Nov
24
comment Why do earphone wires always get tangled up in pocket?
Hairs have one-way movement (or a preffered direction at least) and therefore with agitation will move in that direction, even if it threads through clothing. Don't know if there's any papers on it though.
Nov
23
comment Constraint force on a rod
If there is no sideways force, won't $x$ and $\theta$ be dependant on each other (assume center of mass falls directly downwards and horizontal table)? You can also treat it as two dimensional and take the vertical plane with the rod in. then the only thing you need to know (once initial conditions are set) is what theta is, and that fully defines the position of the rod?
Nov
22
awarded  Nice Answer