9,754 reputation
21022
bio website akhmeteli.org
location Houston, TX
age
visits member for 3 years, 7 months
seen 20 mins ago

19h
comment Confusion about Fock subspace
@Apogee: No. Whatever $n$ you choose, there can be more non-zero elements in a point from $F^0_s$. What's important, there must be a finite number of such non-zero elements for each individual point.
19h
answered Confusion about Fock subspace
1d
comment Why did high quality mirrors use aluminum coatings instead of silver?
@Rob Jeffries: "How does your "answer" help the OP understand why aluminium is used for coatings rather than silver?" It does not. On the other hand, it might help somebody to understand that aluminum is not the only game in town, as the question seems to imply. In my book, it means the answer hopefully "gets the asker going in the right direction". I am often criticized here for offering short answers. Many people exceed the minimum requirements of this site. So they deserve and get more rep. That does not change the rules.
1d
comment Why did high quality mirrors use aluminum coatings instead of silver?
@Rob Jeffries: This is an opinion, not a fact. According to the rules, "Any answer that gets the asker going in the right direction is helpful" (physics.stackexchange.com/help/how-to-answer )
Jul
25
revised Can a building get taller at night?
Addition
Jul
25
answered Can a building get taller at night?
Jul
23
comment Could a vacuum airship be possible?
@IanRingrose: Maybe it is:-)
Jul
23
comment Could a vacuum airship be possible?
@JeppeStigNielsen: I did some preliminary work, spent quite some time and quite a bit of money:-). The results were as expected (sorry, cannot be more specific right now). I need more time and money to go further and am currently lacking both:-) Hopefully, I'll be able to tell you more in the future:-)
Jul
21
answered Could a vacuum airship be possible?
Jul
19
answered What trajectory do particles follow in the two-slit experiment in Bohm-de Broglie theory
Jul
17
answered What was the largest object/particle tunneling observed?
Jul
14
awarded  Civic Duty
Jul
14
answered Why do the waters of the different oceans of the world have different ratios of their H and O isotopes?
Jul
13
comment Isn't the data insufficient in this problem?
@Ashkan: Not quite, they have the same magnitude, but opposite signs: the rope does the work, but work is done on the weight. But yes, the work done by the rope equals the increase in the potential energy of the weight.
Jul
13
comment Isn't the data insufficient in this problem?
@Ashkan: It is against the rules of the site to give solutions to homework problems, sorry. I believe the tip I gave should be enough.
Jul
13
answered Is it true as entropy increases things become more symmetric?
Jul
13
answered Isn't the data insufficient in this problem?
Jul
12
comment Using particle accelerators for nuclear fusion
@user43087: As far as I know, that won't help, moreover, I am not sure you won't make it worse this way. Energy losses for deceleration radiation and ionization will prevail.
Jul
12
answered Using particle accelerators for nuclear fusion
Jul
6
comment Dielectric constant of water
@Floris: No disagreement was implied in my comment:-) And thank you for the interesting info.