306 reputation
15
bio website molecular.cz/~fackovec
location Prague, Czech Republic
age 25
visits member for 2 years, 7 months
seen Jan 10 '13 at 17:45

May
19
awarded  Yearling
Oct
21
awarded  Student
May
9
comment Density of classical states in quantum theory
@Ron: postHF = post-Hartree-Fock
May
9
comment Density of classical states in quantum theory
@genneth: DFT is exact only theoretically. noone has ever found correct functional. it is like telling that using configurational integral is exact solution, but it is just rephrasing the problem.
Apr
24
comment Density of classical states in quantum theory
DFT is an approximation often called an expensive RNG. I talk about some precise stuff, exact wavefunction. Not those coupled cluster or PIMC approximations.
Apr
24
awarded  Editor
Apr
24
revised Density of classical states in quantum theory
the word "root" after "square" was added by an invisible evil dwarf
Apr
16
asked Density of classical states in quantum theory
Apr
16
awarded  Nice Answer
Apr
15
answered What does it mean for two objects to “touch”?
Apr
11
answered How does an object regains its neutrality after being charged by rubbing?
Apr
11
awarded  Supporter
Apr
10
answered Boundary layer theory in fluids learning resources
Apr
10
comment How to find that a molecule has zero spin?
Pauli exclusion priciple implies only that only 2 electrons can occupy 1 orbital. Energetic degeneracy of more distinct orbitals can cause some orbitals to be only singly occupied. There is also a Hund principle of maximum multiplicity (electrons having same spin repel less each other resulting in lower energy). So not all atoms/ions/compounds with even number of electrons have zero spin.
Apr
10
awarded  Teacher
Apr
10
answered How to find that a molecule has zero spin?
Apr
10
comment What formulae for calculating fluid pressure change involves these parameters?
It seems to be volumetric flow. I do not see viscosity in the formula.
Apr
10
answered What is the molecular model of heat of mixing?
Apr
10
answered Energy formula for separating $O_2$ from mixture of $O_2$, $NH_3$ and $H_2O$