How massive would a black hole have to be in order for it to
evaporate due...
How massive would a black hole have to be in order for it to
evaporate due to Hawking radiation in only one year? How big is
that mass compared to some object with which you are familiar? (On
the surface of the Earth, 1 kg ? 2.2 lb.)
One "extreme" example of gravity is a black hole. What would
happen to the Earth's orbit if the Sun was suddenly replaced by a
black hole of the same mass? Why? (Please ignore any processes that
the Earth would experience during the formation of the black hole.)
Please break it down for us dummies
The singularity at the center of a black hole is predicted to be
a region of zero volume and infinite density that contains all of
the black hole's mass. It is a point at which all currently known
physical laws break down. Yet in a black hole, this "terrible
point" is hidden from view behind an event horizon that prevents
any knowledge about the singularity reaching the outside universe.
Astronomers continue to spend considerable effort trying to
understand the nature...
Describe, in detail, what would happen if you fell into
a black hole, from both your perspective, and the perspective of
someone who is watching you fall in. You should include specific
effects, including effects on space, time, and what you would
see.
Is the "event horizon" of a black hole potentially violable?
Black holes are commonly described as being unidirectional (matter
/ energy goes in, but doesn't come out), but is the event horizon
of a black hole potentially deformable? That is, in the case of two
black holes colliding (let's say), is there not a point when the
effective gravitational field between the two black holes "cancel
out", thereby causing a potential "escape path" for light traveling
perpendicular to the axis...
What is the mass of the black hole at the center of our galaxy
if a star orbiting 0.0025 pc away has an orbital period of 7 years?
Be careful of units here.
1. What is the evidence for a black hole at the center of the
Milky Way? How does this compare to stellar size blackholes? How
can these smaller blackholes be observed?
2. What is Hubble’s Law? In what situations does Hubble’s Law
not apply?
3. What is the cosmic microwave background? What is its
origin?
Once you have detected the possible presence of a black
hole, what data do you need to prove that it is indeed a black hole
and not a very massive star cluster?