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Matter - Everything around Us | Science for Kids | Grade 3 | Periwinkle
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We’re taking a journey through space, jumping on each planet in our Solar System. On which planets could you get the most elevation? Which gas giant’s surface gravity would leave you with an unimpressive hop? What would your body feel like jumping on all these planets?
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Jeffrey Vinokour aka The Dancing Scientist reveals the fun science behind products we use every day.
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CHANGES AROUND US
We see a lot of changes around us - from falling of tree leaves to blossoming of flowers. Human body also undergoes a lot of changes like a child grows into a full grown adult. These are natural changes and they cannot be reversed. For example an adult cannot become a child again.
There are some changes which can be reversed. Take a balloon and blow some air into it. The balloon becomes big. Then let the air escape through the nozzle of the balloon. it gets back to its original shape. Take a paper and fold it to make a paper plane. After sometime unfold the paper plane and the paper gets back to its previous shape. This activity shows that some changes can be reversed.
Instead of the air escaping out of the balloon take a pin and burst it. Now the balloon loses its previous shape. Instead of folding the paper plane, cut it into desired shapes. The structured changes in the shape of the paper cannot be reversed.
Consider some more examples:
When you crack an egg to open, the egg and the egg white cannot be converted into an egg again. You can convert grains into flour but you cannot convert flour into grains. Thus some changes are reversible while some are irreversible changes.
Adam Savage and Jamie Hyneman set up a real life fruit ninja scenario and compare its accuracy to the classic video game.
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Will America’s disregard for science be the end of its reign?
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From America's inception, there has always been a rebellious, anti-establishment mentality. That way of thinking has become more reckless now that the entire world is interconnected and there are added layers of verification (or repudiation) of facts.
As the great minds in this video can attest, there are systems and mechanisms in place to discern between opinion and truth. By making conscious efforts to undermine and ignore those systems at every turn (climate change, conspiracy theories, coronavirus, politics, etc.), America has compromised its position of power and effectively stunted its own growth.
A part of the problem, according to writer and radio host Kurt Andersen, is a new media infrastructure that allows for false opinions to persist and spread to others. Is it the beginning of the end of the American empire?
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TRANSCRIPT:
KURT ANDERSEN: Americans have always been magical thinkers and passionate believers in the untrue. We were started by the Puritans in New England who wanted to create, and did create, a Christian utopia and theocracy as they waited for the imminent second coming of Christ and the end of days. And in the South by a bunch of people who were convinced, absolutely convinced, that this place they'd never been was full of gold just to be plucked from the dirt in Virginia. And they stayed there looking and hoping for gold for 20 years before they finally, finally faced the facts and the evidence and decided that they weren't going to get rich overnight there.
So that was the beginning. And then we've had centuries of 'buyer beware' charlatanism to an extreme degree and medical quackery to an extreme degree, and increasingly exotic, extravagant, implausible religions over and over again from Mormonism, to Christian science, to Scientology in the last century. And we've had this anti-establishment, "I'm not going to trust the experts. I'm not going to trust the elite," in our character from the beginning. Now, all those things came together and were supercharged in the 1960s when you were entitled to your own truth and your own reality. Then, a generation later when the internet came along, giving each of those realities, no matter how false or magical or nutty they are, their own kind of media infrastructure.
We had entertainment, again, for our whole last couple 100 years, but especially in the last 50 years, permeating all the rest of life, including presidential politics, from John F. Kennedy through Ronald Reagan to Bill Clinton. So, the thing was set up for Donald Trump to exploit all these various American threads and astonishingly become president. But then you look at this history and it's like, "Oh, we should've seen this coming."
TYSON: The power of journalism: A mistake becomes truth. The print journalism is taking what I said and turning it into an article, so it has to pass through the journalist, get processed, and then it becomes some written content on a page. One hundred percent of those experiences, the journalist got something fundamentally wrong with the subject matter. And just as an interesting point about the power of journalists, I had people read the article and say, "Neil, you must know better than that. That's not how this works." They assumed the journalist was correct about reporting what I said, not that I was correct and that the journalists was wrong. This is an interesting power that journalists have over whether you think what they're writing is true or not. That was decades ago. In recent years, what I think has happened is that they're more journalists who are science fluent that are writing about science than was the case 20 years ago. So now I don't have to worry about the journalist missing something fundamental about what I'm trying...
Read the full transcript at https://bigthink.com/videos/an....ti-science-pro-consp
We offer this 4min video on “Science in America”, containing what may be the most important words Neil deGrasse Tyson has ever spoken.
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Robot home appliances like automatic vacuum cleaners need to build up a map of where they live in order to move.
Typically LiDAR spatial technology, which has a spinning laser to determine distance, is used – but it has it’s shortcomings too, like high-performance ability and cost.
New software, developed by Slamcore, is being used so robots use visual imaging, rather than LiDAR, to make up a map of their surroundings.
Slamcore CEO Owen Nicholson said the next level of spatial intelligence is knowing how the world around you is shaped “from a geometry point of view”.
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Morgan Freeman and Leroy Cronan take a look at the process of evolution and the splitting of cells to answer the big question, are we here for a reason?
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Congress Holds Joint Session To Ratify 2020 Presidential Election
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Police Clash With Anti-Lockdown Protesters In London
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Pro-Trump Supporters Hold "Stop The Steal" Protest In Atlanta, As State's Recount Nears End
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Star ending his life
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Researched and Written by Jon Farrow
Narrated and Edited by David Kelly
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Thank to Pablo Carlos Budassi for his wonderful images of the KBC Void, Shapley Supercluster and Bootes Void.
Stock footage taken from Videoblocks and Artgrid, music from Epidemic Sound, Artlist and Silver Maple. Space imagery also used from NASA and ESO.
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Visualisations of the QCD Vacuum
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00:00 Introduction
05:41 Mapping The Cosmos
16:40 Meatball Honeycomb Sponge (Structure of the Universe)
21:55 Cosmic Seeds (Origin of Structure)
39:36 Problems With Copernicus
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Is reality real? These neuroscientists don’t think so, with Richard Dawkins, Heather Heying, Donald Hoffman & more
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Up next ►► Navigating reality: It’s all about perspective | Daniel Schmachtenberger https://www.youtube.com/watch?v=ZNcyc_sEtpU
Is there an external reality? Is reality objective? Is the information your senses are feeding you an accurate depiction of reality? Most neuroscientists, biologists, and scientific leaders believe that we only understand a sliver of what is real.
Although we assume our senses are telling us the truth, they’re actually fabricated to us. Considering senses are unique from person to person, and through our unique senses we can only intemperate a fraction of what is real, there is no all-encompassing perspective one can have. Because of this, we need to take our perceptions seriously, but not literally.
Multiple perspectives have to be taken, as each will have some sort of truth lies within them. Seeing partial truth in multiple perspectives is fundamental to navigating the world and making informed decisions.
Read the video transcript: https://bigthink.com/videos/objective-reality
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CHAPTERS:
0:00 Beau Lotto on how we perceive our external reality.
0:32 Alva Noë on how our reality projects into our nervous system.
1:20 Donald Hoffman on if our senses are telling us the truth.
2:58 Frank Wilczek on how we perceive color and sound.
4:41 Daniel Schmachtenberger on perception, choice making, and navigating reality.
6:01 Heather Heying on how to figure out what is true in reality.
6:28 Richard Dawkins on objective reality vs. science
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Read more of our stories on objective reality:
Did we evolve to see reality as it exists? No, says cognitive psychologist Donald Hoffman.►► https://bigthink.com/surprisin....g-science/does-reali
Is human consciousness creating reality? ►►https://bigthink.com/surprisin....g-science/is-human-c
New hypothesis argues the universe simulates itself into existence►► https://bigthink.com/surprisin....g-science/new-hypoth
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Join scientists as they grab light from across the universe to prove quantum entanglement is real.
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Einstein called it “spooky action at a distance,” but today quantum entanglement is poised to revolutionize technology from computers to cryptography. Physicists have gradually become convinced that the phenomenon—two subatomic particles that mirror changes in each other instantaneously over any distance—is real. But a few doubts remain. NOVA follows a ground-breaking experiment in the Canary Islands to use quasars at opposite ends of the universe to once and for all settle remaining questions.
(Premiered January 9, 2019)
Chapters:
00:00 Introduction
03:52 Is Quantum Entanglement Real?: Canary Islands Experiment
08:10 The Beginnings of Quantum Mechanics
15:26 Quantum Mechanics Explained by Einstein, Podolsky and Rosen
22:39 Developments from Discovery of Quantum Theory
27:11 The First Quantum Entanglement Experiment
32:04 Quantum Computers Solving Real-World Problems
39:02 Loopholes of Quantum Entanglement
45:20 The Results of the Canary Islands Experiment
47:47 Quantum Entanglement in Modern Physics
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This video is about Bell's Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn't like "spooky action at a distance"), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and others have managed to extend the theoretical work, and Alain Aspect performed the first Bell test experiment in the late 1980s.
Thanks to Vince Rubinetti for the music: https://soundcloud.com/vincerubinetti/one-two-zeta
And thanks to Evan Miyazono, Aatish Bhatia, and Jasper Palfree for discussions and camaraderie during some of the inception of this video.
REFERENCES:
John Bell's Original Paper: http://inspirehep.net/record/3....1657/files/vol1p195-
Quantum Theory and Reality: https://www.scientificamerican.....com/media/pdf/19791
"What Bell Did" By Tim Maudlin: https://arxiv.org/pdf/1408.1826
Bell's Theorem on Wikipedia: https://en.wikipedia.org/wiki/Bell%27s_theorem
2015 experimental confirmation that QM violates Bell's theorem: https://arxiv.org/pdf/1508.05949.pdf
https://journals.aps.org/prl/a....bstract/10.1103/Phys
Bell's Theorem without Inequalities (GHZ): http://dx.doi.org/10.1119/1.16243
Kochen-Specker Theorem: https://en.wikipedia.org/wiki/....Kochen–Specker_theor
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What do physicists actually mean when they talk about the Multiverse? Sean Carroll explains.
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Up next, Michio Kaku: The Multiverse Has 11 Dimensions ► https://youtu.be/jI50HN0Kshg
The Multiverse is having a moment. From “Rick and Morty” to Marvel movies, the idea that our Universe is just one of many has inspired countless storylines in recent popular culture.
Why is the Multiverse so compelling? To theoretical physicist and philosopher Sean Carroll, one reason is that we’re drawn to wondering how things might have turned out differently. What if you had chosen a different career path? Married someone else? Moved to a different city?
Of course, there’s obviously no guarantee that you’re living out those alternate timelines in a different universe. But there are real scientific reasons to think that the Multiverse exists. And as Carroll explains, that possibility comes with some fascinating philosophical implications.
Read the video transcript ► https://bigthink.com/series/th....e-big-think-intervie
0:00 Hollywood’s Multiverse
1:35 Physics’ Multiverse: Cosmology vs. Many Worlds
3:28 The Many Worlds theory
4:25 Are there many versions of you?
6:39 Your alternate lives
8:09 Your one life in our Universe
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About Sean Carroll:
Dr. Sean Carroll is Homewood Professor of Natural Philosophy — in effect, a joint appointment between physics and philosophy — at Johns Hopkins University in Baltimore, and fractal faculty at the Santa Fe Institute. Most of his career has been spent doing research on cosmology, field theory, and gravitation, looking at topics such as dark matter and dark energy, modified gravity, topological defects, extra dimensions, and violations of fundamental symmetries. These days, his focus has shifted to more foundational questions, both in quantum mechanics (origin of probability, emergence of space and time) and statistical mechanics (entropy and the arrow of time, emergence and causation, dynamics of complexity), bringing a more philosophical dimension to his work.
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Read more of our stories on the multiverse:
Other than Doctor Strange, is the Multiverse good for anything?
► https://bigthink.com/13-8/mult....iverse-doctor-strang
Why the Multiverse is a “God-of-the-gaps” theory
► https://bigthink.com/13-8/multiverse-religion/
The power of regret fuels our love of the Multiverse
► https://bigthink.com/high-cult....ure/regret-multivers
----------------------------------------------------------------------------------
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Episode 21 #YourDailyEquation: Albert Einstein and his colleagues Podolsky and Rosen proposed a simple way to rid quantum mechanics of its most disturbing feature--called non-locality--in which an action undertaken here can affect the result of a measurement undertaken there, even if here and there are far apart. John Bell came up with a way to test Einstein's vision of reality, ultimately showing that Einstein's vision was wrong.
Even if your math is a bit rusty, join Brian Greene for brief and breezy discussions of pivotal equations and exciting stories of nature and numbers that will allow you to see the universe in a new way.
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Neils Bohr said, “It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we can say about Nature.” Well it turns out that if we pay attention to this subtle difference, some of the most mysterious aspects of nature make a lot more sense.
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