37,718 reputation
648125
bio website arXiv.org
location Europe
age 48
visits member for 3 years, 7 months
seen 1 min ago

I'm a theoretical physicist.


1h
reviewed Close Half-massive sphere in space
1h
comment These two operators commute…but their eigenvectors aren't all the same. Why?
$\uparrow$ Agree.
1h
comment Do we exist in multiple dimensions?
Related: physics.stackexchange.com/q/10527/2451 , physics.stackexchange.com/q/83492/2451 and links therein.
1h
revised What does the Reynolds Number of a flow represent physically?
dim tag not relevant
2h
comment These two operators commute…but their eigenvectors aren't all the same. Why?
It is interesting to note that the theorem talks about diagonalizable operators (rather than selfadjoint operators, although admittedly the latter is what is relevant for QM). Being diagonalizable is a generic property. Being selfadjoint is a special property.
2h
revised Determine which circuits are parallel and which are in series
edited tags
3h
comment Topology of phase space
Comment to the question (v3): See V.I. Arnold, Mathematical methods of Classical Mechanics, $\S49$.
3h
comment Non-integrability of the 2D double pendulum
Comment to the question (v4): The total external torque $\tau_z=\frac{dL_z}{dt}$ (produced by gravity) around the suspension point, is rarely zero. Hence $L_z$ is not an integral of motion.
3h
revised Uniform motion - need help with this problem
edited tags
4h
revised What wilI I observe when travelling at almost the speed of light?
edited tags; edited title
4h
wiki created homework-and-exercises description
4h
wiki created homework-and-exercises excerpt
4h
revised Calculating the distance that a telescope can detect
edited tags
4h
revised Find the current/potential difference across each bulb
edited tags; edited title
5h
revised For a massless pulley moving upwards with acceleration, is the upward force equal to the downward force?
edited tags
5h
revised Difference in “momentum” names in Lagrangian mechanics
now you brought it up let's include everything
6h
revised Variational Theorem proof
added 75 characters in body; edited tags
6h
revised Graphene has a honeycomb lattice - true or false?
edited tags
6h
reviewed Close Recent important observations on dark matter
6h
revised Recent important observations on dark matter
deleted 46 characters in body; edited tags