235 reputation
15
bio website
location New Jersey
age 62
visits member for 1 year
seen Jul 29 at 1:37

2d
awarded  Yearling
Jul
29
accepted Escaping a black hole
Jul
2
awarded  Curious
Dec
19
asked Did a piece of Halley's comet strike the Earth 1,500 years ago?
Dec
16
awarded  Scholar
Dec
16
awarded  Supporter
Dec
16
accepted How do we know that the intrinsic brightness of Cepheid variables corresponds to their period?
Dec
16
asked How do we know that the intrinsic brightness of Cepheid variables corresponds to their period?
Nov
26
comment Escaping a black hole
I think they've discovered an experimental error at CERN, something about the timing of the 2 clocks. So they no longer think that the neutrinos may have traveled faster than light. I think the things emanating from black holes are 1/2 of the virtual particle pairs that spontaneously appear in empty space, when a particular pair appears right outside the event horizon. I'm wondering if you need to be moving anywhere near c to escape a black hole as long as you can apply continuous acceleration. @AlexanderMP's comment about "time" may be my answer. But I also wonder about curvature.
Nov
25
comment Escaping a black hole
My question revolves around my understanding that an escape velocity is an initial velocity, that without any additional acceleration is sufficient to escape the gravitational pull of a planet. So, for example, if we had a good enough power source and reaction mass, we should be able to get arbitrarily far from the earth, while moving at a constant slow speed. Correspondingly could this work with a black hole, or is there something about the curvature of space that makes escape impossible.
Nov
25
asked Escaping a black hole
Nov
22
comment Does our universe have to be embedded in a higher dimensional space?
@AlexeyBobrick Thanks for the clarification.
Nov
22
comment Does our universe have to be embedded in a higher dimensional space?
@AlexeyBobrick I'm trying to understand your answer. Did you say that all known toroids can be embedded in a 3-D space? A simple example is a 3-D doughnut in our 3-D space. With respect to the universe, I'm assuming it cannot be embedded in a larger 3-D space, like an actual doughnut. I wonder if the entire 3-D space could be a torus without there being a larger 3-D space or an n-D space (n>3) to contain it.
Nov
21
asked Does our universe have to be embedded in a higher dimensional space?
Nov
20
awarded  Informed
Nov
20
awarded  Student
Nov
20
asked How can only 1 magnetic pole of the Sun change at a time?