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- Опубліковано 28 чер 2020
- What is a black hole? How do astronomers know they actually exist? Learn about black holes via a range of curriculum topics including kinetic energy, potential energy, universal gravitation, orbits, the behaviour of light, the electromagnetic spectrum, and scientific models.
This video is part of Perimeter Institute's free educational resource Black Holes. Download the teacher’s guide, modifiable worksheets, and supporting materials at: resources.perimeterinstitute....
Perimeter's educational outreach programs and resources like these are made possible in part thanks to our donors. Be part of the equation: perimeterinstitute.ca/donate. - Наука та технологія
I love how it's just slow enough for me to comprehend.
Simple yet perfect explanation . Thank you!
I'm a sucker for this stuff
You're deaf of course
@@jesuschristus2465 go away Jesus
watching all this cosmic stuff makes my earth-issues much smaller and irrelevant ;-)
Facts. It’s funny when your so insignificant
Well said
Excellent! I love these UA-cam videos from the Perimeter Institute. Science! The world needs more science!
The point mass is just as undefined as a singularity. At the center of the earth g=0 and so the pressure P=mgh, instead of being zero is a few billion tons.
Beautiful video
Shiit audio
If a black hole creates jets which expel matter at near 'C' speeds at their poles, then it should be possible at some point in the future to visually measure ejected matter speeding away from each polar region of the black hole at combined divergence speeds which exceed 'C' in opposing directions?
"which exceed 'C' in opposing directions
No, neither exceed C relative to the source NOR to each other. Covered in special relativity.
FROM BRAZIL: A GOOD PRESENTATION FOR AMATEURS
...not
Can our sun and stars the mass of our sun produce elements up to the element iron or does it have enough energy to produce up to iron? I got the impression that elements with higher atomic number above iron can only be produced in a supernova?
" mass of our sun produce elements up to the element iron "
No, I think can reach silicone but definetly not iron. That takes a more massive star.
" I got the impression that elements with higher atomic number above iron can only be produced in a supernova?
Iron and up take more energy to fuse into existence then the reaction releases. And the fusion into iron puts a lot of the energy that it does generate into neutrinos that energy just escapes the core of the star so the star collapses as there no longer enough heat left to hold up the mass of the outer layers. At which point there will either be a bounce as the core forms a neutron star held up by neutron degeneracy pressure and there is a supernova OR there will more mass than that pressure can hold up and a black hole forms and no supernova.
Whoa dude
4th here
An excellent production of audio, video and graphic. A good short science fiction.
As science it has negative value, because you failed to point out the video is based on current belief. A belief based on assumption of scientist ignorant of facts. All Man’s observation is by interaction of light which is stream of photon (part of matter) with matter. They interact with gravity, meaning they have no idea of space bodies evolution producing molecule, rocks, comet, asteroid, moon, planet star, galaxies.
Man dose not know internal structure of photon or how interact with gravity. Therefore the narrated story is based on false data and series of assumption of matter’s evolution. with these ignorance they have interpreted space vortex to be black hole.
Law of physic is universal, but no one has told me what matter a black hole made of. What element which has gravity v size they claim. Gravity depend on Mass of element. it depend on size of it’s nuclei. Nuclei become unstable as it become larger. Therefore only in fiction one can have small body with large gravity. When I told Stephen Hawking this and he is wrong. He replied, I want to be successful, not correct. So the viewer need to chose. To be scientist you need to be correct. To be successful you need to regurgitate the crap they feed you otherwise you are not a believer and a failed scientist.
Full information in my 1975 Bremen Summerhouse notes or by official permission / request of Madam chancellor Angela Merkel I will instruct their release. Ferydoon Shirazi. MG1
" A good short science fiction.
BS.
" because you failed to point out the video is based on current belief. "
Lie, present evidence and theory. They are not going on belief. They could be partly wrong but there ARE supernovae and there ARE black holes.
" A belief based on assumption of scientist ignorant of facts."
Says someone that is ignorant of the facts and theory.
"They interact with gravity, meaning they have no idea of space bodies evolution producing molecule, rocks, comet, asteroid, moon, planet star, galaxies."
Yes they do, your ignorance is not theirs.
"Man dose not know internal structure of photon"
There is no evidence that it has one. Same for the electron.
"Therefore the narrated story is based on false data and series of assumption of matter’s evolution."
Lie, real data and theories that fit the evidence.
" assumption of matter’s evolution
We have fused the hydrogen isotopes of deuterium and tritium. and the results fit the theory.
"Law of physic is universal,
So far anyway and we can observe out for billions of light years.
"with these ignorance they have interpreted space vortex to be black hole.
No, we have the mass and a good idea of the volume and the mas to high to not be a black hole even with stellar mass black holes. For super massive the evidence is even better.
" but no one has told me what matter a black hole made of."
Look it up. Its not really matter anymore as no particles or forces can with stand the warping of space-time to that degree.
"Gravity depend on Mass of element.
NO. WRONG Wrong wrong. It does not matter what element it is. Just how much mass/energy. For example, this HAS OBSERVED TO OCCUR with LIGO, two neutron stars can coalesce to form a black hole. The matter WAS mostly neutrons before they hit each other. After that its just mass/energy trapped in the closed space-time of the black hole.
"Nuclei become unstable as it become larger."
Yes, so what?
"When I told Stephen Hawking this and he is wrong. He replied, I want to be successful, not correct.
I don't believe that happened. As he knew full well that it was NOT the mass of the elements that is involved. It is the total mass energy that is involved. What elements that were involved is completely irrelevant.
"So the viewer need to chose. "
Yeah going on evidence or your ignorance.
" To be scientist you need to be correct."
No, you need to go on the evidence to try to get as correct as you can manage. Unlike you.
"To be successful you need to regurgitate the crap they feed you"
OK that is just stupid as Dr Hawking did no such thing. YOU are the crap source here.
"Full information in my 1975 Bremen Summerhouse notes "
So you cannot manage a link nor do you know shit about gravity. IF you have evidence PUBLISH IT instead of telling people they should get permission from someone somewhere with no contact information.
Thanks for the crank post. Gravity does not work the way you think. Get a real education instead of just making up crap.
Ethelred Hardrede
Don't exist, you were wrong. Thanks for playing.
You just need ONE narrator who actually knows the subject, whose first language is English, AND NO ANNOYING, LOUD, DISTRACTING BACKGROUND MUSIC.
Get a grip Perimeter. You can't have annoying loud background music drowning out the drivelly slurps of people, whose first language is no English, trying to speak English. Nobody can understand.