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bio website akhmeteli.org
location Houston, TX
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visits member for 3 years, 7 months
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20h
comment Can a fruit fly move through a large bubble without popping it?
@AcidJazz: well, he did not mention wet fingers:-)
21h
comment Can a fruit fly move through a large bubble without popping it?
@Acid Jazz: No, what I meant asking the question, I was surprised that you did not write about your experience with "poking" bubbles with wet fingers in your answer before I wrote my answer. However, you have answered my question, saying "I did not thought of it").
22h
comment Can a fruit fly move through a large bubble without popping it?
@Acid Jazz: Thank you for the confirmation. However, why did not you write so in your answer? Just curious.
22h
answered Can a fruit fly move through a large bubble without popping it?
Aug
25
comment Spin-orbit model; Hamiltonian seems to be non-Hermitian
@Daimonie: something like that, but maybe $x$ should be replaced by $z$
Aug
25
comment Spin-orbit model; Hamiltonian seems to be non-Hermitian
@Daimonie: Maybe you should not bother about hermiticity right now, just find the eigenvectors and the eigenvalues. $p_j$, $\sigma_i p_i$ and $H$ all commute, so look for common eigenvectors of all these operators. For example, can you find eigenvectors of $\sigma_3 p_3$ (no summation)?
Aug
25
comment Spin-orbit model; Hamiltonian seems to be non-Hermitian
@Daimonie: eigenvectors of $\sigma_i p_i$ are also eigenvectors of the Hamiltonian, as far as I can see.
Aug
25
answered Spin-orbit model; Hamiltonian seems to be non-Hermitian
Aug
23
answered Slit width in single-slit diffraction
Aug
23
answered Levitating capacitor
Aug
22
comment Are there any inventions/applications in our world based on QFT?
@Acid Jazz: So I am in a good company:-)
Aug
22
answered Are there any inventions/applications in our world based on QFT?
Aug
21
answered Ohm's law holds at constant temperature - what about Joule heating?
Aug
21
answered If we attach a fan at the end of a boat and switch it on, will the boat move?
Aug
18
comment Can you huddle next to a fridge in sub-zero temperatures and keep warm?
@Floris: It depends on the design of the fridge. The design that you describe can create problems for the freezer at low ambient temperature (appliance-repair-it.com/garage-refrigerator.html ), so in some designs the fridge runs at low temperature (see the previous ref. and beko.co.uk/support/faqs/fridges/… )
Aug
16
revised How to increase pressure in a bottle?
addition
Aug
16
comment How to increase pressure in a bottle?
@Luke Allen: I concur with rodrigo's comment.
Aug
16
answered How to increase pressure in a bottle?
Aug
16
answered Can you huddle next to a fridge in sub-zero temperatures and keep warm?
Aug
15
comment What's faulty in my reasoning about energy and momentum in this problem?
@Alex: What's not obvious, is your statement that the athlete and the luge have the same speed: if I throw a ball, I accelerate it for some time, but that does not mean my center of mass speed is the same as the speed of the ball when it leaves my hand. The wording of the problem allows both your assumption and the OP's assumption, moreover, in both cases the answers are not reasonable.