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visits member for 3 years, 5 months
seen Mar 13 at 20:19

Nov
26
comment Is there some special cutoff density after which spacetime “collapses” and forms a black hole?
@Qmechanic : not really that question is about the density of black hole, this question is about density threshold where the space collapses and black hole forms.
Nov
26
comment Is there some special cutoff density after which spacetime “collapses” and forms a black hole?
Thank you Brandon, yes, that is the question I updated the title.
Nov
25
comment Is there some special cutoff density after which spacetime “collapses” and forms a black hole?
my point is at what density, the fabric of space breaks down and at beyond that point only black holes with infinite density can exist? in other words what is the upper limit for density before space break down? What is the value of $x$?
Jan
11
comment If nothing is “objectively real” prior to “measurement”, what exactly is a “measurement”?
+1, god damn good question
Dec
26
comment What is the current radius of cosmological event horizon?
@Johannes : I am not looking for changes of cosmological event horizon in time, but that right now given that $H_0$ is constant in space, then what is the value of cosmological event horizon right now?
Dec
26
comment What is the current radius of cosmological event horizon?
@LuboŇ°Motl : because of the first line of the answer , I wasn't sure if my question was implying the contrary, I wasn't questioning Johannes but confirming that my question is not implying the contrary. the result I ended up with was $13\times10^{10}$ it is 3 times the answer of from alpha. My question is at this point of time, how far is the cosmological event horizon? If it was possible to take a snap shot of universe, with given $H_0$ at this point of time, since it is not dependent on time.
Dec
26
comment What is the current radius of cosmological event horizon?
Is The Hubble length suppose to coincide with the radius of the observable universe? or not? Sorry I am confused, I don't know why Hubble length and radius of the observable universe relate to each other.
Dec
26
comment Will a magnet loose too much strength it cut with a hacksaw?
If heat is a concern, then liquid nitrogen will make it a snap!
Jun
25
comment Variations of double slit experiment with their results to look up
Indeed that is type of thing that I am intrested, time to spice up the double slit experiment!
Mar
18
comment From where (in space-time) does Hawking radiation originate?
@Dilaton : I thought the radiation was due to the uncertainty principle.
Mar
18
comment From where (in space-time) does Hawking radiation originate?
@Dilaton : yes, but is it an exact distance or has some level indeterminency? in other words could a photon inside finds itself (if it is sufficeintly close enough to some region we would consider as the event horizon) all of a sudden outside?
Mar
18
comment From where (in space-time) does Hawking radiation originate?
Where exactly is the event horizon?
Jan
26
comment How does heat transfer between two atoms in solid material?
Ok, so instead of atomic level let's say blocks of the material, e.g. $1 mm^3$ blocks of Iron. Now given the time intervals of $t_\delta$ and each block having temperature $T_k$ where k is the index of the $k^{th}$ block. are there any models for this?
Nov
14
comment If a car appears in horison and within 2 seconds passes you by, whats the speed it's doing?
@RichardTerrett : true, it seems there is nothing more can be done
Sep
2
comment Why can't quantum teleportation be used to transport information?
+1, damn good question
Aug
30
comment What is the name of the principle saying it is meaningless to talk/ask questions that can not be measured/tested?
Thank you, +1 for taking the time for such a complete answer.
Aug
28
comment Comparing scales of atomic level objects to scales of everyday size objects
@Ron : What is a mechanical procedure? The simul of sunflower Kernel and Footbal Field? can you use the mechanical precudure to give few more examples that fit this the scale of 1:100000 please? thank you
Aug
28
comment Comparing scales of atomic level objects to scales of everyday size objects
@Ron : Numbers are good, but what in real life can be used to convey the ratio of 1:100,000 ? David's sunflower kernel and footbal field helps more to visualisiations than 1:100,000.
Aug
10
comment Acceleration of two masses by gravitational force
Timtam, upvoting for noting that this is a dupliacte, if you could include the link that you gave in your comment in your answer that would be greate. Tx
Aug
10
comment Acceleration of two masses by gravitational force
Timtam , can you please rephrase it, I have read it few times and I still don't get it, I also deleted all my previous comments.