1,913 reputation
623
bio website chubig.net
location Cambridge, United Kingdom
age 24
visits member for 2 years, 2 months
seen Dec 19 '12 at 12:10

Mostly doing physics, I sometimes also end up forcing together various innocent binaries in /bin and /usr/bin to get a job done. They usually hold together just long enough to finish :\

I don’t answer questions that use non-SI units.


Oct
6
awarded  Yearling
Sep
30
awarded  Explainer
Oct
6
awarded  Yearling
Dec
14
reviewed Reviewed Thorium radioactivty vs Uranium radioactivty nuclear power
Dec
14
awarded  Nice Answer
Dec
14
reviewed Reviewed How target locking woks?
Dec
13
comment Semiconductor problem: how much Boron is required to establish a certain amount of charge carrier density
How many ‘charge carriers’ are there if you dope a given amount of Germanium with one Boron atom? How does this translate to a ‘charge carrier densitiy’ if you dope one mole of Germanium with one Boron atom?
Dec
13
revised If the LHC doesn't find the Higgs Boson, what would be the implications for the Standard Model?
edited tags
Dec
13
comment Lagrangian of 2D square lattice of point masses connected by springs
Apart from the quadratic term, there are only two other terms: The kinetic energy (which you should also have in your classical Lagrangian from which you started your derivation) and the third-order term $g_{abc}q_aq_bq_c$, which you cannot recover from a HO, but only from higher-order contributions, which essentially correspond to multi-particle interactions.
Dec
13
reviewed Reviewed Lagrangian of 2D square lattice of point masses connected by springs
Dec
13
answered Quantum Conservation versus classical conservation
Dec
13
revised Internal energy according to the van der Waals equation
edited tags
Dec
13
reviewed Reviewed Is it possible to lift yourself off from the ground?
Dec
13
reviewed Reviewed Why does Physica A journal contain economics papers?
Dec
11
reviewed Reviewed Why does a black hole have a finite mass?
Dec
11
reviewed Reviewed Why can't there be a trap door under nuclear reactors in case of meltdown?
Dec
11
comment Why does the echo for soundwaves hitting a vacuum come back out of phase?
Ah, ok. Just to throw in some numbers: $\lambda \approx 1 \textrm{ m}$ for audible sound waves (at $f = 300 \textrm{ Hz}$), the mean free path being something on the orders of tens or hundreds of metres in outer space (en.wikipedia.org/wiki/… , en.wikipedia.org/wiki/Vacuum#Measurement)
Dec
11
comment Why does the echo for soundwaves hitting a vacuum come back out of phase?
Could you expand on how sounds of some frequencies are supposed to travel through vacua?
Dec
11
comment Optical equivalent of a superconductor
Sorry, wasn’t me, I think?
Dec
11
reviewed Reviewed Why does the echo for soundwaves hitting a vacuum come back out of phase?