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What is torque? This is one of those things that you may have heard about in passing but never really understood. In this episode of Crash Course Physics, Shini sits down with us to discuss what torque is, how it works, why it works, and what it all has to do with this thing called "moment of inertia."
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What's that smell? Smell's like Organic Chemistry! This week Hank talks about Aromatics and Cyclic Compounds, naming their substituents, resonance, and common reactions & uses.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
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Table of Contents
Cyclic Organic Compounds & Naming Their Constituents 1:06
Aromatic Compounds 3:02
Resonance 3:18
Naming Aromatic Compounds 5:05
Common Reactions & Uses 7:24
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Our next stop in our tour of the ethical lay of the land is utilitarianism. With a little help from Batman, Hank explains the principle of utility, and the difference between act and rule utilitarianism.
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This week we are looking at your parasympathetic division, which is the "resting and digesting" unit. Unfortunately, learning about this de-stressing division also involves a whole lot of memorization. Don't worry, though - we've got some mnemonic devices to help you out!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
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Chapters:
Introduction: Parasympathetic Nervous System 00:00
Comparing Structures of the Sympathetic & Parasympathetic Nervous Systems 1:41
What Do Cranial Nerves Do? 2:49
The 12 Cranial Nerves 4:03
Mnemonics & Memory Tips for Studying the 12 Cranial Nerves 5:24
Vagus Nerve 6:40
The Autonomic Nervous System & Sex 8:16
Review 9:13
Credits 9:53
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Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Mark Brouwer, Simun Niclasen, Brad Wardell, Roger C. Rocha, Jan Schmid, Elliot Beter, Nevin Spoljaric, Sandra Aft, SR Foxley, Jessica Simmons, Stefan R. Finnerup, Jason A Saslow, Robert Kunz, Jessica Wode, Mike Drew, Steve Marshall, Anna-Ester Volozh, Christian Ludvigsen, Jeffrey Thompson, James Craver, Alex Lee CPA, Liz Siron, Kathryn "Fallout Shelter" Plimpton, Daniel McLaughlin, Kate Plimpton, Thanks Zujus!, Charlie Kuski, Rachel Lee, Felicia Gilcris
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Learn all about animals! In this animal learning video for kids, you will learn about dogs, owls, polar bears, turtles and MUCH more!
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Music credits:
"Tech Live", "River Fire", "Doobly Doo", "Angel Share", "Teddy Bear Waltz"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
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Photo credit:
Baby Siberian eagle-owls at the Screech Owl Sanctuary, St. Columb Major, Cornwall. P.D. Johnson. 25 May 2015 https://creativecommons.org/li....censes/by/2.0/deed.e
Thanks for watching this Homeschool Pop learn video all about fun animals!
We hope to hear from you soon, and happy learning!
Homeschool Pop Team
Heading out into the wild? Don’t just pack your tent and hope for the best—these camping hacks could literally save your life. From tricks to start a fire in the rain, to ways you can purify water in an emergency, these tips are pure survival gold. You’ll also learn how to keep wild animals away, signal for help, and stay safe when things don’t go as planned. Whether you’re a weekend camper or planning a big wilderness adventure, these hacks turn you into the friend everyone trusts when nature gets tough. Watch now, because knowing these could be the difference between a bad trip and a rescue story.
Animation is created by Bright Side.
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This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate.
In this episode, Hank goes over Reversible Reactions, the water dissociation constant, what pH and pOH actually mean, Acids, Bases, and Neutral Substances as well as the not-so-terrifying Logarithms, strong acids, weak acids, and how to calculate pH and pOH. Oh, and litmus paper!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
--
Table of Contents
Reversible Reactions 3:40
Water Dissociation Constant 5:00
Acids, Bases, & Neutral Substances 6:38
Strong and Weak Acids 7:43
Logarithms 1:46
Calculating pH and pOH 8:45
Cool Mathematical Connections 9:54
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In which John Green teaches you how the Civil War played a large part in making the United States the country that it is today. He covers some of the key ways in which Abraham Lincoln influenced the outcome of the war, and how the lack of foreign intervention also helped the Union win the war. John also covers the technology that made the Civil War different than previous wars. New weapons helped to influence the outcomes of battles, but photography influenced how the public at large perceived the war. In addition, John gets into the long-term effects of the war, including the federalization and unification of the United States. All this plus homesteading, land grant universities, railroads, federal currency, and taxes.
Check out the US National Archives Flickr. They have an awesome collection of Matthew Brady Civil War photography here: http://www.flickr.com/photos/u....snationalarchives/co
Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. One of the most influential moments of the Civil War was when President Lincoln issued the Emancipation Proclamation: https://www.commonlit.org/text....s/the-emancipation-p
However, Lincoln faced a long and difficult road before abolishing slavery, as seen in his relationship with Frederick Douglass: https://www.commonlit.org/text....s/abolishing-slavery
When President Lincoln was assassinated, the nation grieved and pondered how it would recover from the Civil War: https://www.commonlit.org/text....s/o-captain-my-capta
Learn more about the Civil War, Frederick Douglass, and more in Crash Course Black American History:
Frederick Douglass (#17): https://www.youtube.com/watch?v=7QOTexnD-NE
Black Americans in the Civil War (#18): https://www.youtube.com/watch?v=_NgdnsjPFNE
Chapters:
Introduction 00:00
Did Lincoln Free the Slaves? 0:59
How Some Slaves Freed Themselves 1:55
Why Lincoln Signed the Emancipation Proclamation 2:41
The Gettysburg Address 4:20
The First Modern War 5:01
Mystery Document 6:04
Matthew Brady - Civil War Photographer 6:26
A New Nation 7:01
The Homestead Act, Morrill Land Grant Act, and Pacific Railway Act 8:16
Financing the Civil War 8:54
Post-War Industrialization 9:37
Credits 10:21
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In which John Green, Hank Green, and Emily Graslie teach you about the Anthropocene, an unofficial geological era that covers the last century or so, in which humanity has made massive progress. We've discovered the Higgs-Boson particle, and awesome electric cars, and amazing smartphones. So all this collective learning and progress has been good for everyone, right? Maybe not. We'll look at some of the pros and cons of all this "progress," including environmental impact, changes in the way people live and work, and political changes and wars that come along with the modern world. We've come a long way, but there's a long way to go. Crash Course will also take a look at what's going to happen in the near future. If we manage to make our way through the coming bottlenecks, we could be OK in coming centuries. Don't get too hopeful, though. The Sun will eventually die, and the Earth will be destroyed, and later the universe will eventually experience heat death. But we won't talk about those downers until next week.
For more information: http://www.bighistoryproject.com
In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange" by Alfred Crosby, Jr. After Columbus "discovered" the Americas, European conquerors, traders, and settlers brought all manner of changes to the formerly isolated continents. Disease and invasive plant and animal species remade the New World, usually in negative ways. While native people, plants, and animals were being displaced in the Americas, the rest of the world was benefitting from American imports, especially foods like maize, tomatoes, potatoes, pineapple, blueberries, sweet potatoes, and manioc. Was the Columbian Exchange a net positive? It's debatable. So debate.
The Columbian Exchange, by Alfred Crosby, Jr: https://bit.ly/3M3ZtbG
Chapters:
Introduction: The Columbian Exchange 00:00
Diseases of the Columbian Exchange 1:14
John Green Does the Cinnamon Challenge (Ew) 4:21
An Open Letter to Tobacco 5:09
Animals of the Columbian Exchange 5:51
Plants of the Columbian Exchange 7:27
People of the Columbian Exchange 9:53
Credits 11:36
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In which John compares and contrasts Greek civilization and the Persian Empire. Of course, we're glad that Greek civilization spawned modern western civilization, right? Maybe not. From Socrates and Plato to Darius and Xerxes, John explains two of the great powers of the ancient world, all WITHOUT the use of footage from 300.
Chapters:
Introduction 00:00
The Persian Empire 0:39
An Open Letter to Aristophanes 3:33
Ionian Greek City-States 5:04
The Persian Wars 5:44
The Peloponnesian War 7:21
Did the Right Side Win the Persian Wars? 9:09
Credits 11:09
Resources:
The Histories of Herodotus: http://goo.gl/I1TM9u
Plato: http://goo.gl/GEcfWX
Plays of Aristophanes: http://goo.gl/xzb9Ff
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In which John Green teaches you about the War of 1812. The War of 1812 was fought between the United States and its former colonial overlord England. It started in, you guessed it 1812. The war lasted until 1815, and it resolved very little. John will take you through the causes of the war, tell you a little bit about the fighting itself, and get into just why the US Army couldn't manage to make any progress invading Canada. And yes, Canadians, we're going to talk about the White House getting burned down. The upshot: no territory changed hands, and most of the other bones of contention were solved prior to the actual war. Although nothing much changed for the US and England, the Native Americans were the big losers. Tecumseh was killed, and the Indian tribes lost a lot of their territory. Watch as John lays it all out for you.
Chapters:
Introduction: The War of 1812 00:00
Causes for The War of 1812 - British Impressment of American Sailors 0:44
Henry Clay and the Warhawks 2:13
Americans Wanted Canada 3:02
Mystery Document 3:42
Expansion into Native American Territory 4:19
Tecumseh and the Battle of Tippecanoe 4:57
The U.S.'s First Declaration of War 6:32
Battles of The War of 1812 7:19
The Treaty of Ghent 9:45
Outcomes of The War of 1812 10:23
The Hartford Convention 11:03
American Nationalism After The War of 1812 11:31
Credits 12:09
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This week, we're learning about sonnets, and English Literature's best-known purveyor of those fourteen-line paeans, William Shakespeare. We'll look at a few of Willy Shakes's biggest hits, including Sonnet 18, "Shall I compare thee to a summer's day," Sonnet 116, "Let me not to the marriage of true minds admit impediment," and Sonnet 130, "My mistresses's eyes are nothing like the sun." We'll talk about what makes a sonnet, a little bit about their history, and even a little bit about how reading poetry helps us understand how to be human beings.
Consider supporting local book stores by purchasing your books through our Bookshop affiliate link https://bookshop.org/shop/complexly or at your local book seller.
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
Sheep Trick or Treat
by Nancy E. Shaw
Illustrated by Margot Apple
Read by Let's Read Stories
What will happen when the sheep go trick-or-treating? Could there be wolves lurking in the woods, hoping to waylay them as they return home with their bags full of goodies? In crisp verse and whimsically eerie pictures, Nancy Shaw and Margot Apple tell the lively story of a remarkable Halloween adventure. Simple sentences, rhyming text, and a humorous tone make this the perfect treat for beginning readers. Fans of this adventuresome flock of sheep will not want to miss this Halloween treat.
Click here to purchase Sheep Trick or Treat: https://www.amazon.com/Sheep-T....rick-Treat-Nancy-Sha
Go to https://brilliant.org/nutshell/ to dive deeper into these topics and more with a free 30-day trial + 20% off the premium subscription!
This video was sponsored by Brilliant. Thanks a lot for the support!
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Reality is not real. Your world is a prediction. Every sight, sound, and touch you experience is the result of calculations your brain makes before reality even reaches you. It fills in gaps, fabricates details, and even alters time itself so you feel like you’re in control. But if everything you know is an illusion… what does that say about you? What does it mean for your choices? Is there even free will?
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Getting rare materials from the ground into your phone is ugly. The mining industry is responsible for air and water pollution and the destruction of entire landscapes. But what if we could replace the mining industry on Earth with a clean process that can’t harm anyone? Well, we can. All we need to do is look up.
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Cancer is a creepy and mysterious thing. While we tried to understand it, to get better at killing it, we discovered a biological paradox that remains unsolved to this day: large animals seem to be immune to cancer. Which doesn’t make any sense – the bigger a being, the more cancer it should have. To understand why, we first need to take a look at the nature of cancer itself.
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This is how we make our living and it would be a pleasure if you support us!
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DISCUSSIONS & SOCIAL MEDIA
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Reddit: https://kgs.link/reddit
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OUR VOICE
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The Kurzgesagt voice is from
Steve Taylor: https://kgs.link/youtube-voice
OUR MUSIC ♬♪
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700+ minutes of Kurzgesagt Soundtracks by Epic Mountain:
Spotify: https://kgs.link/music-spotify
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The Soundtrack of this video:
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🐦🐧🐤 PATREON BIRD ARMY 🐤🐧🐦
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Many Thanks to our wonderful Patreons from http://kgs.link/patreon who support us every month and made this video possible:
Dennis Barzanoff, HGING231, Taylor Sutton, Agazzy Kan, Isabelle Sagastume, Richard Larsen, Carini, Arvīds Pelēcis, chrisnov, Anish Weerasooriya, Erik Stafford, Apoorva Chandra, Renee Annan, Alex Cross, Jan Karlík, Alexander Fielding, Lukas Schmidt, André, Jianzhuo Wu, Dina Andrei, Iskandar 323, Promethius84 ., Michael Altherr, Devon Meyer, Honza Tomášek, Da Yi, stephanie santos, Kyrill Abrams, Scott Blechman, Alexandre Valdetaro, Balázs Varju, TheBozzCL, Bufe, Mr_Blu42, Kamil, Scott, Alan Lu, Chris Gardner, Youssef Adib, Sean Markham, R, Severin Klingler, Sebastian, Gurneel Kang, SatanicPanic, ohad shalev, Grayson Gordon, 健樑 黃, Taavi Taijala, Lara Rimassa, Paul Wittau, Sir. Forest, schanuel, Cleo Wong, Mihaela Ciobanu, Tibor, secure taka, GeF, rolf redford, Martin Kärgell, Devyn Phillips, Tiger Darian
Simultaneous equations are where we work with two algebreic equations to solve unknowm variables.
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Percentages can be done mentally both accurately and rapidly using this cool math trick. Become a genius in no time!
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