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No Ensemble Averaging Below the Black Hole Threshold – Edward Witten
No Ensemble Averaging Below the Black Hole Threshold – Edward Witten
No Ensemble Averaging Below the Black Hole Threshold – Edward Witten
Event horizon | Definition, Explanation, & Facts [1]
Our editors will review what you’ve submitted and determine whether to revise the article.. – black hole Schwarzschild radius Hawking radiation
At the event horizon, the escape velocity is equal to the speed of light. Since general relativity states that nothing can travel faster than the speed of light, nothing inside the event horizon can ever cross the boundary and escape beyond it, including light
Likewise, any radiation generated inside the horizon can never escape beyond it. For a nonrotating black hole, the Schwarzschild radius delimits a spherical event horizon
Stellar black hole [2]
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star.[1] They have masses ranging from about 5 to several tens of solar masses.[2] The process is observed as a hypernova explosion[3] or as a gamma ray burst.[3] These black holes are also referred to as collapsars.. By the no-hair theorem, a black hole can only have three fundamental properties: mass, electric charge, and angular momentum
The gravitational collapse of a star is a natural process that can produce a black hole. It is inevitable at the end of the life of a massive star when all stellar energy sources are exhausted
If the collapsing star has a mass exceeding the TOV limit, the crush will continue until zero volume is achieved and a black hole is formed around that point in space.. The maximum mass that a neutron star can possess (without becoming a black hole) is not fully understood
Chapter 18 Homework 15 The Bizzare Stellar Graveyard Flashcards by michael pecoraro [3]
what most stars become when they die an early stage of a neutron star a precursor to a black hole a brown dwarf that has exhausted its fuel for nuclear fusion. as massive as the Sun but only about as large in size as Jupiter about the same size and mass as the Sun but much hotter as massive as the Sun but only about as large in size as Earth as large in diameter as the Sun but only about as massive as Earth
about 1.4 times the mass of our Sun limitless; there is no theoretical limit to the maximum mass of a white dwarf about 3 times the mass of our Sun about the mass of our Sun. an object that will ultimately become a black hole the remains of a star that died by expelling its outer layers in a planetary nebula a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons the remains of a star that died in a massive star supernova (if no black hole was created)
A typical neutron star is more massive than our Sun and about the size (radius) of _________.. a small asteroid (10 km in diameter) Jupiter Earth the Moon
Curious Kids: how do black holes pull in light? [4]
How can a black hole pull in light when light isn’t a physical thing? – Will, age 8, Victoria. What an excellent question, Will! I too wondered about this when I started to learn the wonders of physics.
Light is just a type of energy, travelling through space. There are many different types of light we can’t physically see, but can detect and even use
Read more: Curious Kids: can our brains sense electromagnetic waves?. It’s important for us to remember that just because light doesn’t have mass, it still is very much a physical thing in our universe, following physical laws.
Answered: Which of the following statements about… [5]
Which of the following statements about black holes is not true?. – If you watch someone else fall into a black hole, you will never see him or her cross the event horizon
– If you fell into a black hole, you would experience time to be running normally as you plunged rapidly across the event horizon.. – All objects inside the event horizon of a black hole can never escape to reach infinity
– A black hole is truly a hole in spacetime, through which we could leave the observable universe.. Is D the false statement? A black hole is a gravity well so it somewhat has a bottom
With reference to Black Hole and Neutron Stars, consider the following statements: 1. Like black holes, neutron stars are formed due to the process known as supernova explosion2. The mass of a neutron [6]
With reference to Black Hole and Neutron Stars, consider the following statements:. 1.Like black holes, neutron stars are formed due to the process known as supernova explosion
Anything less than that will be identified as a black hole.. 3.Neutron star would be having a hard surface while a black hole does not have a surface.
Statement 1 is correct: Like black holes, neutron stars are formed due to the process known as supernova explosion when the centre of a very big star falls in upon itself, or collapses.. Statement 2 is incorrect: The mass of a neutron star is generally 1 to 3 times the mass of Sun
Is The Universe Filled With Black Holes That Shouldn’t Exist? [7]
Is The Universe Filled With Black Holes That Shouldn’t Exist?. Every object in the Universe is constrained by the laws of physics
When it comes to the objects that are found all throughout the Universe, most of them align with our theoretical expectations. Occasionally, however, scientists will find an object that seems to defy conventional wisdom
For black holes, the overwhelming majority of them originate from a supernova explosion occurring in a massive star near the end of its life. Over time, black holes can grow by merging with other objects and accreting additional mass, and they can form from the mergers of other objects as well
Sources
- https://www.britannica.com/topic/event-horizon-black-hole#:~:text=At%20the%20event%20horizon%2C%20the,escape%20beyond%20it%2C%20including%20light.
- https://en.wikipedia.org/wiki/Stellar_black_hole
- https://www.brainscape.com/flashcards/chapter-18-homework-15-the-bizzare-stell-4562000/packs/6200817
- https://theconversation.com/curious-kids-how-do-black-holes-pull-in-light-208848
- https://www.bartleby.com/questions-and-answers/which-of-the-following-statements-about-black-holes-is-not-true-if-you-watch-someone-else-fall-into-/f1d6f5dc-457e-401d-8fae-bef31607d6d0
- https://blog.forumias.com/question/with-reference-to-black-hole-and-neutron-stars-consider-the-following-statements-1-like-black-holes-neutron-stars-are-formed-due-to-the-process-known-as-supernova-explosion2-the-mass-of-a-neutron/
- https://medium.com/starts-with-a-bang/is-the-universe-filled-with-black-holes-that-shouldnt-exist-da8d161a914c
