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Dec
15
comment What limits the maximum sustainable surface charge density of a sphere in space?
field emission seems to limit maximum negative charge densities, but it seems to me that the equivalent of the work function for ions in a positively charged metal surface would be vastly superior than that given by the electron work function
Dec
11
awarded  Benefactor
Dec
11
accepted Theoretical limits to specific strength with hierarchical structures
Dec
2
awarded  Inquisitive
Dec
1
revised Theoretical limits to specific strength with hierarchical structures
added 27 characters in body
Dec
1
asked Theoretical limits to specific strength with hierarchical structures
Nov
26
comment Why is quantum entanglement considered to be an active link between particles?
"Why is quantum entanglement considered to be an active link between particles?" Because most people can't think of correlation without causation?
Oct
29
asked Dropping vertices of an overdetermined statics system graph
Oct
22
awarded  Investor
Oct
22
comment Strain-Displacement relationship symmetrization
but it is a quantity that in principle can be different at different points of the solid
Oct
21
comment Strain-Displacement relationship symmetrization
so they can be interpreted as a rigid rotation strain?
Oct
21
comment Strain-Displacement relationship symmetrization
but in this case the anti-symmetric components of displacements are in principle invariant under such relabeling or axis reorientation. The anti-symmetric component of a 3x3 matrix transforms as an axial vector
Oct
21
comment Strain-Displacement relationship symmetrization
you are referring to the Voigt notation: en.wikipedia.org/wiki/Voigt_notation
Oct
21
comment Strain-Displacement relationship symmetrization
can you point a reference for this and elaborate a bit?
Oct
21
asked Strain-Displacement relationship symmetrization
Oct
8
asked Does a superconductor spinning in a magnetic field radiate?
Oct
2
accepted Beads flying out of flask
Oct
1
asked Beads flying out of flask
Sep
25
comment What is the highest frequency directly detected?
What would you say qualifies as a 'direct' detection? a waveform in an oscilloscope?
Sep
25
awarded  Popular Question