23,117 reputation
44989
bio website
location Princeton, NJ
age 25
visits member for 2 years, 4 months
seen 4 hours ago

I am a graduate student studying astrophysics at Princeton. I received my bachelor's in physics and mathematics from Caltech (2011).

My primary interest is in general relativistic magnetohydrodynamics simulations of black hole accretion.


1d
reviewed Leave Open Does light or waves have any kind of mass?
1d
comment Lightning strikes the Ocean I'm swimming in - what happens?
You never did fix what Mark was taking about. If $R = \rho L/S$ is the resistance of one such wire, then the current through that one wire is $I_\mathrm{wire} = V/R = VS/\rho L$. Then the current through your body is $I_\mathrm{body} = (A/S) I_\mathrm{wire} = AV/\rho L$. In particular, $S$ must drop out of the final formula, since the current in a continuous medium shouldn't depend on how you imagine chopping it up. Moreover, the proper calculation involves integrating $\rho/r^2$, which diverges unless the lightning strikes an extended area.
2d
reviewed Approve Why don't we have a theory of everything?
2d
reviewed Close String theory uncertainty limit?
2d
reviewed Close Change of vectors
2d
reviewed Leave Open Weighted mean from data
2d
comment Numerical eigenbasis for a unitary
For the record Computational Science might have been the best place to ask this originally.
Dec
18
comment What is the average mass of galaxies according to Hubble Deep and Ultra Deep field observations?
@AbanobEbrahim Your (1) could be quite difficult. Where do you make the low-end cutoff? For a warmup, how many satellite galaxies orbit the Milky Way? This number was revised not long ago, and is still debated. And what is a galaxy anyway? Do you count globular clusters?
Dec
17
comment What is the temperature of the clear night sky from the surface of Earth?
Indeed, "2K73" could reasonably be untypod to "273 K" or "2.73 K." I never before realized how close the freezing point of water was to 100 times the CMB temperature.
Dec
17
comment What is the most compelling evidence of General Relativity in the presence of matter and energy?
@Bridgeburners Wikipedia has a derivation. As for getting masses and radii for the same objects -- that has proven rather difficult. There aren't any particularly good datapoints in that parameter space... yet. Also, predictions for such data points are influenced not only by pure GR, but also by your assumed equation of state.
Dec
17
revised Symbols of derivatives
added a link and another example
Dec
17
comment What is the most compelling evidence of General Relativity in the presence of matter and energy?
Good question, not a duplicate, and as the OP is right to note all suggestions in the comments are tests only of the vacuum field equation.
Dec
17
reviewed Close How Do we Know How Old the Universe Is?
Dec
17
answered Can Einstein's 'Theory of General Relativity' exist in Harmony with 'Quantum Mechanics'?
Dec
17
answered At what point do researchers in physics make the leap from wild theoretical ideas to physical experiments?
Dec
16
comment Relativistic Kill Vehicle
Obligatory xkcd: what-if.xkcd.com/1
Dec
16
reviewed Close Understanding the physical applications of the Laplacian: Finding the heat-equation using the continuity equation
Dec
16
answered Dynamic equations for propagation of light through dust
Dec
15
answered Relation between Entropy and Temperature
Dec
15
reviewed Leave Closed Why are we using water pipe instead of air pipe to warm our houses?