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seen Oct 15 at 20:07

Oct
11
answered Intuition on positive-operator valued measures (POVM)
Oct
11
answered Why is force a localized vector and not a free vector?
Oct
11
comment Big jump or small jumps?
Of course, in real life, our muscles are not 100% efficient, which means we need more energy than the kinetic energy we gain (extreme case: If just holding a heavy weight, from a physical point of view we don't do any work, yet our muscles still consume energy in order to sustain the force; that energy is completely converted to heat).
Oct
11
answered why does a change in velocity cause length contraction, mass gain and the slow down of time?
Oct
6
awarded  Enlightened
Oct
6
awarded  Nice Answer
Sep
30
awarded  Explainer
Sep
13
answered How similar is comparison between the principle behind Newton's Cradle versus AC Current moving down a transmission line?
Sep
7
awarded  Critic
Sep
7
comment Lightspeed (invariance) measurement methods
The very first determination of the speed of light by Rømer did not need mirrors.
Sep
7
comment Special Relativity, 2nd Postulate — Why?
Thank you; I've corrected the spelling errors (and improved some formulations).
Sep
7
revised Special Relativity, 2nd Postulate — Why?
Last paragraph: corrected spelling, improved formulation
Sep
7
answered Special Relativity, 2nd Postulate — Why?
Sep
7
answered Riemann curvature tensor notation in Wald
Sep
7
comment Do we weigh less in the morning?
"During the night, the sun is above us, and the earth below us." I think you mean: "During the day, the sun is above us ..."
Sep
6
comment Can entanglements themselves be entangled?
Most importantly, entanglement is not a relation in the mathematical sense because in general, particles can be entangled in inequivalent ways. That is, there is not only "entangled" and "not entangled", there are different inequivalent ways in which particles can be entangled. Systems consisting of just two systems which have just two states each (that is, two qubits) are special in that regard, since they are the only system that shows only one type of entanglement. Indeed, in the case of more than two particles, there's even no longer an unique maximally entangled state.
Sep
6
answered Can entanglements themselves be entangled?
Sep
6
answered Can we multiply an electromagnetic field?
Aug
31
revised Can someone please qualitatively explain unitary group from a physics perspective?
fixed O(3) → SO(3)
Aug
31
answered Can someone please qualitatively explain unitary group from a physics perspective?