Search Results: "Hel"

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12:21 Popular
Heart Disease and Heart Attacks

999 views / 1 likes - added 9 years ago

Basics of heart disease, heart attacks, heart failure, angina, cardiac arrest. Special thanks to Edward J Perper, MD for help in clarifying certain aspects of this video. Licensed under CC-BY-SA More free lessons at: http://www.khanacademy.org/video?v=vYn
18:27
Introduction to mortgage loans

467 views / 0 likes - added 9 years ago

Explains mortgages. This will help you understand what you are doing when you are paying a mortgage. More free lessons at: http://www.khanacademy.org/video?v=IDHJCEKeHLc
12:04
Precession Causing Perihelion to Happen Later

558 views / 0 likes - added 9 years ago

Clarifying the effect of axial precession on the calendar and the date of perihelion and aphelion More free lessons at: http://www.khanacademy.org/video?v=2o-Sef6wllg
07:07
Apsidal Precession (Perihelion Precession) and Milankovitch Cycles

501 views / 0 likes - added 9 years ago

Apsidal Precession (Perihelion Precession) More free lessons at: http://www.khanacademy.org/video?v=m6lMGoZTJnc
20:34
Helper T Cells

586 views / 0 likes - added 9 years ago

Introduction to helper T cells and their role in activating B cells More free lessons at: http://www.khanacademy.org/video?v=uwMYpTYsNZM
15:15
Standard Error of the Mean

493 views / 0 likes - added 9 years ago

Standard Error of the Mean (a.k.a. the standard deviation of the sampling distribution of the sample mean!) More free lessons at: http://www.khanacademy.org/video?v=J1twbrHel3o
17:43
Matrices: Reduced Row Echelon Form 1

623 views / 0 likes - added 9 years ago

Solving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=L0CmbneYETs
07:37
Matrices: Reduced Row Echelon Form 2

635 views / 0 likes - added 9 years ago

Another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=lP1DGtZ8Wys
12:08
Matrices: Reduced Row Echelon Form 3

678 views / 0 likes - added 9 years ago

And another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=JVDrlTdzxiI
29:00 Popular
Lin Alg: Changing coordinate systems to help find a transformation matrix

853 views / 0 likes - added 9 years ago

Changing our coordinate system to find the transformation matrix with respect to standard coordinates More free lessons at: http://www.khanacademy.org/video?v=K_na_j1Msfg
08:28
Congressional Committees: Crash Course Government and Politics #7

694 views / 0 likes - added 9 years ago

This week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the candidate-choosing kinds) as well as the staff agencies that help advise these c
10:32 Popular
Eclipses: Crash Course Astronomy #5

830 views / 0 likes - added 9 years ago

The big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- As promised, Phil's sun spotting recommendations: Astronome
12:01
Telescopes: Crash Course Astronomy #6

666 views / 0 likes - added 9 years ago

Today Phil explains how telescopes work and offers up some astronomical shopping advice. -- How Telescopes Work 1:07 Refractors vs Reflectors 2:50 Technology and the Light Spectrum 7:45 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow P
11:21 Popular
Introduction to Anatomy&Physiology: Crash Course A&P #1

848 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
10:43 Popular
Tissues, Part 1: Crash Course A&P #2

886 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Jordan Schoonover FROM: Mom, Dad&Madison Happy Birthday Jordan! We love you sweetheart!! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything w
10:16 Popular
Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3

1,538 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO : Phoebe and James McMullan FROM : Dad Continue being awesome Phoebe&James from John&Hank! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
10:29 Popular
Tissues, Part 3 - Connective Tissues: Crash Course A&P #4

1,134 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Ashley FROM: Fee Happy birthday nerd also I love you lots and lots *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if y
09:43 Popular
Tissues, Part 4 - Types of Connective Tissues: Crash Course A&P #5

1,590 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: the world. FROM: Laura Love Rathbun Learning is the best thing to do with your you! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're
09:40 Popular
The Integumentary System, Part 1 - Skin Deep: Crash Course A&P #6

854 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Ciaran FROM: your sister Jillian Happy birthday! Hope you enjoy being immortalized via doobly-doo! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with ev
09:57 Popular
The Integumentary System, Part 2 - Skin Deeper: Crash Course A&P #7

750 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Helle Søndergaard FROM: Martin Søndergaard Congratulations for finishing first semester on physiotherapy! I'm so proud! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as
10:36 Popular
The Nervous System, Part 1: Crash Course A&P #8

1,168 views / 1 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Kerry FROM: Cale I love you with all my ha-art. Deadset. *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can aff
11:44 Popular
The Nervous System, Part 2 - Action! Potential!: Crash Course A&P #9

1,144 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Carla FROM: Christopher Next stop is whenever. Just be like, "stop." *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if
10:57 Popular
The Nervous System, Part 3 - Synapses!: Crash Course A&P #10

1,413 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: NerdFighteria FROM: Dave at DTXC.CO Cycling t-shirts at DTXC.CO. Don't give up the Road! DFTBA! *** Subbable Co-Sponsors: Logan Sanders https://www.facebook.com/perrylogans Dr. Boyev http://youtube.com/taichiknees *** You can di
10:08 Popular
Central Nervous System: Crash Course A&P #11

1,186 views / 1 likes - added 9 years ago

Today Hank talks about your central nervous system. In this episode we'll explore how your brain develops and how important location is for each of your brain's many functions. Table of Contents Central Nervous System, Location and Brain Function 1:48 Bra
10:02 Popular
Peripheral Nervous System: Crash Course A&P #12

1,525 views / 2 likes - added 9 years ago

It is now time to meet the system that helps your crazy brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and efferent divisions, how it proc
08:49 Popular
Autonomic Nervous System: Crash Course A&P #13

1,508 views / 1 likes - added 9 years ago

Hank takes you on a tour of your two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences - where ner
14:37 Popular
Exploring the Universe: Crash Course Big History #2

710 views / 0 likes - added 9 years ago

In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a bunch of hydrogen and helium turned into stars, formed galaxies, created heavy
13:41 Popular
Migrations and Intensification: Crash Course Big History #7

1,025 views / 0 likes - added 9 years ago

In which Hank and John Green teach you about humanity conquering the Earth. Or at least moving from Africa into the rest of the Earth. As human beings spread out across the world and populations grew, humanity reached a critical mass of innovators, and co
13:43 Popular
Rethinking Civilization - Crash Course World History 201

743 views / 0 likes - added 9 years ago

In which John Green returns to teaching World History! This week, we'll be talking about the idea of civilization, some of the traditional hallmarks of so-called civilization, and why some people would choose to live outside the civilization model. It tur
14:04 Popular
Money&Debt: Crash Course World History 202

900 views / 0 likes - added 9 years ago

In which John Green teaches about filthy, filthy lucre. Money. And Debt. So, what is money? And what is it for? And why do we use money? And why does it all disappear so quickly after payday? John will look into 75% of these questions, and if he doesn't c
11:37 Popular
Disease! Crash Course World History 203

973 views / 2 likes - added 9 years ago

In which John Green teaches you about disease, and the effects that disease has had in human history. Disease has been with man since the beginning, and it has shaped the way humans operate in a lot of ways. John will teach you about the Black Death, the
10:37 Popular
War&Human Nature: Crash Course World History 204

905 views / 2 likes - added 9 years ago

In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the effects that war ha
12:48 Popular
War and Civilization: Crash Course World History 205

720 views / 3 likes - added 9 years ago

In which John Green investigates war, and what exactly it may or may not be good for. Was war a result of human beings organizing into larger and more complex agricultural social orders, or did war maybe create agriculture and "civilization?" It's hard to
10:08 Popular
Climate Change, Chaos, and The Little Ice Age - Crash Course World History 206

1,137 views / 2 likes - added 9 years ago

In which John Green teaches you about the Little Ice Age. The Little Ice Age was a period of global cooling that occurred from the 13th to the 19th centuries. This cooling was likely caused by a number of factors, including unusual solar activity and volc
07:21 Popular
Humans and Energy: Crash Course World History 207

1,096 views / 1 likes - added 9 years ago

In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun. Historically, almost all of the energy that humans use has been directly or indirec
10:30 Popular
Drought and Famine: Crash Course World History #208

1,209 views / 0 likes - added 9 years ago

In which John Green teaches you a little bit about drought, which is a natural weather phenomenon, and famine, which is almost always the result of human activity. Throughout human history, when food shortages strike humanity, there was food around. There
09:10 Popular
HOW World War I Started: Crash Course World History 209

1,492 views / 6 likes - added 9 years ago

In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great War. You'll learn ab
10:56 Popular
Who Started World War I: Crash Course World History 210

1,067 views / 3 likes - added 9 years ago

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius Caesar? One thing w
12:59 Popular
The End of Civilization (In the Bronze Age): Crash Course World History 211

858 views / 1 likes - added 9 years ago

In which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The Levant, and Mesopotamia came to an end. What's that you say? There was no su
11:54 Popular
The Rise of the West and Historical Methodology: Crash Course World History #212

893 views / 2 likes - added 9 years ago

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of the West. And the
12:55 Popular
Asian Responses to Imperialism: Crash Course World History #213

799 views / 0 likes - added 9 years ago

In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European powers. We'll look at th
12:31 Popular
The Railroad Journey and the Industrial Revolution: Crash Course World History 214

737 views / 2 likes - added 9 years ago

In which John Green teaches you about railroads, and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam powered railroads, pretty much all locomotion had
12:51 Popular
Population, Sustainability, and Malthus: Crash Course World History 215

1,136 views / 0 likes - added 9 years ago

In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In 1800, the human popu
13:28 Popular
Islam and Politics: Crash Course World History 216

1,106 views / 0 likes - added 9 years ago

In which John Green teaches you about how Islam has interacted with politics during it's history, and how it continues to do so today. Islamist movements are in the news a lot lately, but how did that happen. John will point out that Islam has alway been
11:44 Popular
The Mughal Empire and Historical Reputation: Crash Course World History #217

990 views / 0 likes - added 9 years ago

There's a new Crash Course poster with all your favorite World History characters! Czech it: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Mughal Empire, which ruled large swaths of the Indian Sub-
15:07 Popular
Luther and the Protestant Reformation: Crash Course World History #218

986 views / 3 likes - added 9 years ago

In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation, pretty much everyone in Europe was a Roman Catholic. Not to get all great man, but Martin Luther changed all that. Martin Luther didn't like the corrupt
13:16 Popular
Charles V and the Holy Roman Empire: Crash Course World History #219

1,088 views / 2 likes - added 9 years ago

Get the new Crash Course World History Character poster here: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Holy Roman Empire by teaching you about Charles V. Charles Hapsburg was the holy Roman Em
11:02 Popular
World War II, A War for Resources: Crash Course World History #220

1,668 views / 11 likes - added 9 years ago

In which John Green teaches you about World War II, and some of the causes behind the war. In a lot of ways, WWII was about resources, and especially about food. The expansionist aggression of both Germany and Japan were in a lot of ways about resources.
12:58 Popular
Congo and Africa's World War: Crash Course World History 221

868 views / 2 likes - added 9 years ago

In which John Green teaches you about the Democratic Republic of the Congo, which used to be Zaire, which used to be The Belgian Congo, which used to be the Congo Free State, which used to be the region surrounding the Congo River Basin in central Africa.
11:09
Water and Classical Civilizations: Crash Course World History 222

676 views / 0 likes - added 9 years ago

In which John Green teaches you about water! So, we talk about resources a lot on Crash Course, and today is no exception. It turns out people can't live without water, which means it's absolutely necessary for civilization. Today John talks about water i
12:53 Popular
Conflict in Israel and Palestine: Crash Course World History 223

858 views / 1 likes - added 9 years ago

In which John Green teaches you about conflict in Israel and Palestine. This conflict is often cast as a long-term beef going back thousands of years, and rooted in a clash between religions. Well, that's not quite true. What is true is that the conflict
11:18 Popular
The Vikings! - Crash Course World History 224

1,299 views / 5 likes - added 9 years ago

In which John Green teaches you about Vikings! That's right, one of our most requested subjects, the Vikings, right here on Crash Course. So what's the deal with Vikings? Well, the stuff you've heard about them may not be true. The Vikings weren't just pa
10:54 Popular
Intro to Psychology - Crash Course Psychology #1

997 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
10:51 Popular
Psychological Research - Crash Course Psychology #2

805 views / 1 likes - added 9 years ago

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10:14 Popular
The Chemical Mind - Crash Course Psychology #3

934 views / 0 likes - added 9 years ago

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12:34 Popular
Meet Your Master: Getting to Know Your Brain - Crash Course Psychology #4

911 views / 0 likes - added 9 years ago

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10:46 Popular
Sensation&Perception - Crash Course Psychology #5

739 views / 0 likes - added 9 years ago

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10:24 Popular
Homunculus - Crash Course Psychology #6

714 views / 0 likes - added 9 years ago

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10:00
Perceiving is Believing - Crash Course Psychology #7

674 views / 0 likes - added 9 years ago

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09:34 Popular
Consciousness - Crash Course Psychology #8

1,093 views / 0 likes - added 9 years ago

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10:41 Popular
To Sleep, Perchance to Dream - Crash Course Psychology #9

1,309 views / 0 likes - added 9 years ago

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11:19
Altered States - Crash Course Psychology #10

681 views / 0 likes - added 9 years ago

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11:50 Popular
How to Train a Brain - Crash Course Psychology #11

1,113 views / 0 likes - added 9 years ago

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09:35 Popular
The Bobo Beatdown - Crash Course Psychology #12

838 views / 0 likes - added 9 years ago

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09:55 Popular
How We Make Memories - Crash Course Psychology #13

1,133 views / 0 likes - added 9 years ago

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10:18 Popular
Remembering and Forgetting - Crash Course Psychology #14

937 views / 1 likes - added 9 years ago

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10:42 Popular
Cognition: How Your Mind Can Amaze and Betray You - Crash Course Psychology #15

904 views / 1 likes - added 9 years ago

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10:02 Popular
Language: Crash Course Psychology #16

874 views / 0 likes - added 9 years ago

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11:20 Popular
The Power of Motivation: Crash Course Psychology #17

1,011 views / 0 likes - added 9 years ago

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09:50 Popular
The Growth of Knowledge: Crash Course Psychology #18

1,032 views / 0 likes - added 9 years ago

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11:38 Popular
Monkeys and Morality: Crash Course Psychology #19

840 views / 0 likes - added 9 years ago

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10:15 Popular
Adolescence: Crash Course Psychology #20

1,018 views / 0 likes - added 9 years ago

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12:24 Popular
Rorschach&Freudians: Crash Course Psychology #21

704 views / 0 likes - added 9 years ago

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11:08 Popular
Measuring Personality: Crash Course Psychology #22

1,029 views / 1 likes - added 9 years ago

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12:39 Popular
Controversy of Intelligence: Crash Course Psychology #23

989 views / 0 likes - added 9 years ago

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11:04 Popular
Brains Vs. Bias: Crash Course Psychology #24

708 views / 1 likes - added 9 years ago

***Subbable Message*** To: Everyone! Life is short. Don't forget to be awesome. Please. From: Dr. Dot To: All Living People Prepare - for I am about to take over the world. From: S.J. Black ****** You can directly support Crash Course at http://www.subbab
10:51 Popular
Feeling All the Feels: Crash Course Psychology #25

736 views / 2 likes - added 9 years ago

***Subbable Message*** To Robert, Thank you for showing me the world, darling! From Amy and That's happiness; to be dissolved into something complete and great. From Ty Scaletta ****** You can directly support Crash Course at http://www.subbable.com/crash
10:20 Popular
Emotion, Stress and Health: Crash Course Psychology #26

965 views / 1 likes - added 9 years ago

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10:10 Popular
Psychological Disorders: Crash Course Psychology #28

869 views / 0 likes - added 9 years ago

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11:32 Popular
OCD&Anxiety Disorders: Crash Course Psychology #29

888 views / 0 likes - added 9 years ago

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10:00
Depressive and Bipolar Disorders: Crash Course Psychology #30

682 views / 2 likes - added 9 years ago

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10:51
Trauma&Addiction: Crash Course Psychology #31

651 views / 0 likes - added 9 years ago

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11:44
Schizophrenia&Dissociative Disorders: Crash Course Psychology #32

607 views / 0 likes - added 9 years ago

••• Subbable Message ••• To: Margarete From: Toni Your sister thinks you are the best! Here's hoping Crash Course does an Art History season just for you. :) ••• To get your own message in the dooblydoo, you can directly support Crash Course at http://www
10:12 Popular
Eating and Body Dysmorphic Disorders: Crash Course Psychology #33

738 views / 0 likes - added 9 years ago

Get Help: If you think you have an eating disorder, please contact http://www.nationaleatingdisorders.org/ for help! You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we'r
10:58 Popular
Personality Disorders: Crash Course Psychology #34

873 views / 1 likes - added 9 years ago

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11:23 Popular
Getting Help - Psychotherapy: Crash Course Psychology #35

702 views / 0 likes - added 9 years ago

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11:09
Biomedical Treatments: Crash Course Psychology #36

683 views / 0 likes - added 9 years ago

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10:48 Popular
Social Thinking: Crash Course Psychology #37

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10:08 Popular
Social Influence: Crash Course Psychology #38

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09:54 Popular
Prejudice&Discrimination: Crash Course Psychology #39

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10:41
Aggression V. Altruism: Crash Course Psychology #40

676 views / 0 likes - added 9 years ago

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12:48 Popular
The Electron: Crash Course Chemistry #5

965 views / 0 likes - added 9 years ago

Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table.
11:13 Popular
Redox Reactions: Crash Course Chemistry #10

1,123 views / 0 likes - added 9 years ago

All the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from atom to atom, they c
10:43
How To Speak Chemistrian: Crash Course Chemistry #11

643 views / 0 likes - added 9 years ago

Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. Table of Contents Determining Formulas and Names of Monatom
09:03 Popular
The Ideal Gas Law: Crash Course Chemistry #12

1,152 views / 0 likes - added 9 years ago

Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it's extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad news is they almost never beh
11:45 Popular
Ideal Gas Problems: Crash Course Chemistry #13

918 views / 0 likes - added 9 years ago

We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our cul
11:26 Popular
Passing Gases: Effusion, Diffusion and the Velocity of a Gas - Crash Course Chemistry #16

1,282 views / 0 likes - added 9 years ago

We have learned over the past few weeks that gases have real-life constraints on how they move here in the non-ideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In this episode, Hank
10:46 Popular
Polar&Non-Polar Molecules: Crash Course Chemistry #23

1,010 views / 1 likes - added 9 years ago

*** PLEASE WATCH WITH ANNOTATIONS ON! SOME INACCURACIES IN GRAPHICS ARE NOTED AND CORRECTED IN ANNOTATIONS. THANKS! *** Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and cate
09:29 Popular
Equilibrium Equations: Crash Course Chemistry #29

734 views / 0 likes - added 9 years ago

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11:23 Popular
pH and pOH: Crash Course Chemistry #30

907 views / 1 likes - added 9 years ago

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11:41 Popular
Buffers, the Acid Rain Slayer: Crash Course Chemistry #31

1,012 views / 2 likes - added 9 years ago

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09:57
Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry #32

625 views / 0 likes - added 9 years ago

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09:18 Popular
Doing Solids: Crash Course Chemistry #33

1,096 views / 0 likes - added 9 years ago

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08:20 Popular
Network Solids and Carbon: Crash Course Chemistry #34

926 views / 0 likes - added 9 years ago

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09:27 Popular
Silicon - The Internet's Favorite Element: Crash Course Chemistry #35

1,288 views / 0 likes - added 9 years ago

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09:04 Popular
Electrochemistry: Crash Course Chemistry #36

1,481 views / 0 likes - added 9 years ago

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09:42 Popular
The History of Atomic Chemistry: Crash Course Chemistry #37

1,042 views / 0 likes - added 9 years ago

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09:58 Popular
Nuclear Chemistry: Crash Course Chemistry #38

743 views / 0 likes - added 9 years ago

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11:18 Popular
Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

1,721 views / 1 likes - added 9 years ago

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11:32 Popular
Hydrocarbon Power! - Crash Course Chemistry #40

901 views / 0 likes - added 9 years ago

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09:36 Popular
Alkenes&Alkynes - Crash Course Chemistry #41

1,082 views / 0 likes - added 9 years ago

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09:50 Popular
Aromatics and Cyclic Compounds - Crash Course Chemistry #42

1,768 views / 0 likes - added 9 years ago

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08:38 Popular
Hydrocarbon Derivatives - Crash Course Chemistry #43

1,112 views / 0 likes - added 9 years ago

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09:05 Popular
Nomenclature - Crash Course Chemistry #44

1,356 views / 0 likes - added 9 years ago

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10:15 Popular
Polymers - Crash Course Chemistry #45

1,738 views / 0 likes - added 9 years ago

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10:34 Popular
The Global Carbon Cycle - Crash Course Chemistry #46

1,694 views / 0 likes - added 9 years ago

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14:11 Popular
The Market Revolution: Crash Course US History #12

780 views / 0 likes - added 9 years ago

In which John Green teaches you about the Market Revolution. In the first half of the 19th century, the way people lived and worked in the United States changed drastically. At play was the classic (if anything in a 30 year old nation can be called classi
12:01 Popular
The Civil War, Part I: Crash Course US History #20

1,283 views / 11 likes - added 9 years ago

In which John Green ACTUALLY teaches about the Civil War. In part one of our two part look at the US Civil War, John looks into the causes of the war, and the motivations of the individuals who went to war. The overarching causes and the individual motiva
10:54 Popular
The Civil War Part 2: Crash Course US History #21

1,224 views / 6 likes - added 9 years ago

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 interven
13:51 Popular
Gilded Age Politics:Crash Course US History #26

789 views / 0 likes - added 9 years ago

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The Progressive Era: Crash Course US History #27

896 views / 1 likes - added 9 years ago

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15:07 Popular
Progressive Presidents: Crash Course US History #29

725 views / 1 likes - added 9 years ago

In which John Green teaches you about the Progressive Presidents, who are not a super-group of former presidents who create complicated, symphonic, rock soundscapes that transport you into a fantasy fugue state. Although that would be awesome. The preside
13:40 Popular
America in World War I: Crash Course US History #30

893 views / 2 likes - added 9 years ago

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13:31 Popular
Women's Suffrage: Crash Course US History #31

743 views / 2 likes - added 9 years ago

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13:12 Popular
The Roaring 20's: Crash Course US History #32

2,197 views / 0 likes - added 9 years ago

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14:27 Popular
The Great Depression: Crash Course US History #33

1,861 views / 7 likes - added 9 years ago

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14:57 Popular
The New Deal: Crash Course US History #34

1,217 views / 0 likes - added 9 years ago

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13:27 Popular
World War II Part 1: Crash Course US History #35

1,478 views / 6 likes - added 9 years ago

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14:23 Popular
World War II Part 2 - The Homefront: Crash Course US History #36

1,436 views / 3 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
13:35 Popular
The Cold War: Crash Course US History #37

915 views / 3 likes - added 9 years ago

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13:42 Popular
The Cold War in Asia: Crash Course US History #38

945 views / 1 likes - added 9 years ago

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11:58 Popular
Civil Rights and the 1950s: Crash Course US History #39

1,174 views / 5 likes - added 9 years ago

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15:15 Popular
The 1960s in America: Crash Course US History #40

908 views / 0 likes - added 9 years ago

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14:51 Popular
The Rise of Conservatism: Crash Course US History #41

701 views / 0 likes - added 9 years ago

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13:24
Ford, Carter, and the Economic Malaise: Crash Course US History #42

651 views / 0 likes - added 9 years ago

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14:20 Popular
The Reagan Revolution: Crash Course US History #43

1,165 views / 1 likes - added 9 years ago

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13:53 Popular
George HW Bush and the End of the Cold War: Crash Course US History #44

946 views / 2 likes - added 9 years ago

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15:38 Popular
The Clinton Years, or the 1990s: Crash Course US History #45

912 views / 1 likes - added 9 years ago

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15:27 Popular
Terrorism, War, and Bush 43: Crash Course US History #46

851 views / 0 likes - added 9 years ago

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15:40 Popular
Obamanation: Crash Course US History #47

761 views / 0 likes - added 9 years ago

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12:07 Popular
A Long and Difficult Journey, or The Odyssey: Crash Course Literature 201

746 views / 1 likes - added 9 years ago

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13:35 Popular
Fate, Family, and Oedipus Rex: Crash Course Literature 202

786 views / 1 likes - added 9 years ago

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12:24 Popular
Ghosts, Murder, and More Murder - Hamlet Part I: Crash Course Literature 203

849 views / 1 likes - added 9 years ago

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11:02
Ophelia, Gertrude, and Regicide - Hamlet II: Crash Course Literature 204

611 views / 0 likes - added 9 years ago

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12:57 Popular
Don't Reanimate Corpses! Frankenstein Part 1: Crash Course Literature 205

1,018 views / 2 likes - added 9 years ago

In which John Green teaches you about Mary Shelley's novel, Frankenstein. Sure, you know Frankenstein the cultural phenomenon, but how much do you know about the novel that started it all? You'll learn about the Romantic movement in English lit, of which
12:38
Frankenstein Part II: Crash Course Literature 206

665 views / 0 likes - added 9 years ago

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13:12 Popular
Reader, it's Jane Eyre - Crash Course Literature 207

766 views / 2 likes - added 9 years ago

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10:19
If One Finger Brought Oil - Things Fall Apart part I: Crash Course Literature 208

678 views / 0 likes - added 9 years ago

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09:30
Things Fall Apart, Part 2: Crash Course Literature 209

651 views / 0 likes - added 9 years ago

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11:55 Popular
To Kill a Mockingbird, Part I - Crash Course Literature 210

758 views / 0 likes - added 9 years ago

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11:37 Popular
Race, Class, and Gender in To Kill a Mockingbird: Crash Course Literature 211

712 views / 0 likes - added 9 years ago

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10:26
PTSD and Alien Abduction - Slaughterhouse-Five Part 2: Crash Course Literature 213

658 views / 0 likes - added 9 years ago

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11:39 Popular
Slavery, Ghosts, and Beloved: Crash Course Literature 214

722 views / 1 likes - added 9 years ago

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11:32 Popular
Langston Hughes&the Harlem Renaissance: Crash Course Literature 215

859 views / 3 likes - added 9 years ago

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11:18 Popular
The Poetry of Sylvia Plath: Crash Course Literature 216

717 views / 2 likes - added 9 years ago

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12:33 Popular
That's Why Carbon Is A Tramp: Crash Course Biology #1

1,427 views / 0 likes - added 9 years ago

And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all containe
12:59 Popular
DNA Structure and Replication: Crash Course Biology #10

1,179 views / 0 likes - added 9 years ago

Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series
14:08 Popular
DNA, Hot Pockets,&The Longest Word Ever: Crash Course Biology #11

1,116 views / 0 likes - added 9 years ago

Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins. Crash Course B
11:05 Popular
Population Genetics: When Darwin Met Mendel - Crash Course Biology #18

929 views / 0 likes - added 9 years ago

Hank talks about population genetics, which helps to explain the evolution of populations over time by combing the principles of Mendel and Darwin, and by means of the Hardy-Weinberg equation. Crash Course Biology is now available on DVD! http://dft.ba/-8
08:51 Popular
Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

1,747 views / 0 likes - added 9 years ago

Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like
11:31 Popular
Simple Animals: Sponges, Jellies,&Octopuses - Crash Course Biology #22

831 views / 0 likes - added 9 years ago

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses a
13:15
Complex Animals: Annelids&Arthropods - CrashCourse Biology #23

675 views / 0 likes - added 9 years ago

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com
10:54 Popular
Animal Behavior - CrashCourse Biology #25

1,129 views / 0 likes - added 9 years ago

Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like Crash Course on Facebook: http://www.facebook.com/youtubecrashcour
11:40 Popular
Circulatory&Respiratory Systems - CrashCourse Biology #27

2,196 views / 0 likes - added 9 years ago

Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function. Crash Course Biology is now available on DVD! ht
13:11 Popular
The Skeletal System: It's ALIVE! - CrashCourse Biology #30

1,287 views / 1 likes - added 9 years ago

Hank introduces us to the framework of our bodies, our skeleton, which apart from being the support and protection for all our fleshy parts, is involved in many other vital processes that help our bodies to function properly. Crash Course Biology is now a
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10:26 Popular
Ecology - Rules for Living on Earth: Crash Course Biology #40

2,193 views / 0 likes - added 9 years ago

Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been interacting with ea
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11:11 Popular
The Agricultural Revolution: Crash Course World History #1

839 views / 0 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
12:44 Popular
Fall of The Roman Empire...in the 15th Century: Crash Course World History #12

981 views / 2 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
12:53 Popular
Islam, the Quran, and the Five Pillars All Without a Flamewar: Crash Course World History #13

1,062 views / 2 likes - added 9 years ago

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12:08 Popular
The Dark Ages...How Dark Were They, Really?: Crash Course World History #14

819 views / 1 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
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Wait For It...The Mongols!: Crash Course World History #17

969 views / 2 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
10:12 Popular
Venice and the Ottoman Empire: Crash Course World History #19

847 views / 1 likes - added 9 years ago

In which John Green discusses the strange and mutually beneficial relationship between a republic, the citystate of Venice, and an Empire, the Ottomans--and how studying history can help you to be a better boyfriend and/or girlfriend. Together, the Ottoma
11:33 Popular
The Renaissance: Was it a Thing? - Crash Course World History #22

1,161 views / 1 likes - added 9 years ago

In which John Green teaches you about the European Renaissance. European learning changed the world in the 15th and 16th century, but was it a cultural revolution, or an evolution? We'd argue that any cultural shift that occurs over a couple of hundred ye
12:35 Popular
Haitian Revolutions: Crash Course World History #30

1,265 views / 1 likes - added 9 years ago

Ideas like liberty, freedom, and self-determination were hot stuff in the late 18th century, as evidenced by our recent revolutionary videos. Although freedom was breaking out all over, many of the societies that were touting these ideas relied on slave l
13:46 Popular
Imperialism: Crash Course World History #35

2,293 views / 0 likes - added 9 years ago

In which John Green teaches you about European Imperialism in the 19th century. European powers started to create colonial empires way back in the 16th century, but businesses really took off in the 19th century, especially in Asia and Africa. During the
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Sesame Street: Seth Meyers Greets the Count

561 views / 0 likes - added 9 years ago

A greeting is a polite way to say,“hello.” “Hi.” That’s another greeting. How many greetings do you know? Say them out loud with Seth Meyers and The Count will count your different greetings. Subscribe to the Sesame Street Channel here: http://www.youtube
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Sesame Street: Pau Gasol Coaches Abby Cadabby

569 views / 0 likes - added 9 years ago

Abby Cadabby needs help learning how to dribble a basketball. Fortunately, Pau Gasol is here to coach her. A coach is someone who teaches you how to do something. Pay attention to Pau's coaching tips and you can learn how to dribble with Abby. Subscribe t
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Sesame Street: Posse of 5 Good Men

545 views / 2 likes - added 9 years ago

Bad Bart, the meanest, toughest outlaw in the land, is on the loose and the sheriff wants to round up 5 good men to find him. Can you count to 5? Great, you can help the sheriff count and find 5 good men. Subscribe to the Sesame Street Channel here: http:
06:19 Popular
Sesame Street: Super Grover Balances Some Chicken Cheerleaders

869 views / 1 likes - added 9 years ago

Give a cheer, give a cheer, give a most substantial cheer! Uh oh! The chicken and elephant cheer squad are having trouble balancing. How can Super Grover help the enthusiastic pom pom squad get their balancing act together? Subscribe to the Sesame Street
01:51 Popular
Sesame Street: Catch the Cookie Thief!

916 views / 0 likes - added 9 years ago

There's a thief on the loose who has snatched up all the Cookie Art at the Cookie Museum. Who is the prime suspect? Why is the thief taking all the cookie art? Will Rachel Dratch and her posse of police penguins pin the perpetrator? Find out on PBS on Feb
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Sesame Street: A Song About Emotions

1,787 views / 0 likes - added 9 years ago

Which emotion are you feeling? Are you nervous, happy, angry, excited, or lonely? This song will help you figure out what emotion you are feeling. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStree
02:26 Popular
Sesame Street: Grover Finds the Tallest Monster

745 views / 1 likes - added 9 years ago

Where did the tallest monster go? Have you seen him? He was just here with Grover and now he's disappeared under one of these hats. Can you remember which hat the tallest monster was wearing? Grover could use your help. Subscribe to the Sesame Street Chan
01:46
Sesame Street: Hello, Halloween!

518 views / 1 likes - added 9 years ago

Say hello to Halloween! Hope you've got your costumes and you're ready to trick or treat! You could turn a pumpkin into a jack-o-lantern or you could dress up like a sea captain! Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscrip
03:08 Popular
Sesame Street: Five Words to Say More Often with Grover and Kid President

724 views / 0 likes - added 9 years ago

Kid President and Grover are here to give you Five Words You Should Say More Often! Isn't that so generous? They are selflessly giving you these five words. Whats that? You want to pay it forward? Awesome! Well, get involved in Socktober. It's as easy as
04:06 Popular
Sesame Street: Socktober Telethon with Grover and Kid President!

805 views / 2 likes - added 9 years ago

Grover and Kid President are teaming up for Sock-cess! To help their friends in need, Grover and Kid President are hosting a Telethon to collect socks for the homeless to keep their feet warm in the winter. You can help too! Helping is as easy as bringing
06:32 Popular
Sesame Street: Super Grover Helps a Duck to a Party

974 views / 0 likes - added 9 years ago

This little ducky got all dolled up for a party, but poor little Ducky didn't realize the party was across the stream. She didn't want to get her fancy party shoes all wet and she was too small to fly across the stream, so she called for the help of Super
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Sesame Street: Let's Be Friends

564 views / 0 likes - added 9 years ago

Do you ever think: "Hey! I wish I had someone to talk to and make jokes with and play tag with?" You do? Well that's what a friend is! Friends are some of the coolest people on the planet. They make you laugh and keep you company and help you learn all ki
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Sesame Street: Happiness is Looking Up (and Finding Cookies)

554 views / 0 likes - added 9 years ago

Cookie Monster is sad, and Ernie wants to help. Ernie suggests looking up to help feel happy. Have you ever tried looking up? Try it! Take a deep breath, throw back your shoulders, and look up! Who knows the great things you'll see when you look up: birds
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Sesame Street: Number 1 (Number of the Day)

1,715 views / 0 likes - added 9 years ago

Number 1! Number 1! Number 1! You might be wondering who: who is number 1? And the answer is simple: number 1! Number 1 is such a great number. Number 1 is a fearless leader, coming before all the other numbers, leading the pack and helping you get to num
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Sesame Street: Repair with Kat Dennings and Abby

641 views / 0 likes - added 9 years ago

What does repair mean? Kat Dennings came all the way to Sesame Street to explain to us, but she dropped the very item she brought to help her explain. What can she do to fix this problem? Maybe Abby can help her put things back together. Subscribe to the
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Sesame Street:“M is for Mystery” Preview

623 views / 0 likes - added 9 years ago

There are mysteries afoot on Sesame Street! Grab your detective hat and join your furry friends to solve these whodunits! When items beginning with the letter“R” start vanishing, Detective Alfie Betts is on the case with a little help from Elmo and Abby!
03:30 Popular
Sesame Street: Michelle Obama&the Most Important Meal

993 views / 4 likes - added 9 years ago

Breakfast is the first meal of the day and it is a very important meal. That's why the First Lady, Michelle Obama, makes sure she eats breakfast even when she visits Sesame Street. So make time for breakfast, even if you're a very busy monster like Grover
00:44 Popular
Sesame Street: "Learning Rocks" Preview

801 views / 0 likes - added 9 years ago

Famous rocker Virgil Von Vivaldi (Michael McKean) is in town to recruit musicians for his all-rock band. Can Elmo and Abby help him find the right rocks? Then LMNOP (Donald Glover) is set to perform on the Street but loses all of his equipment. Can the Se
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Sesame Street: One Direction and Bert Sing the Alphabet

687 views / 1 likes - added 9 years ago

Liam and Harry from One Direction are pretty sure they know their ABCs, but they wanted to run through them one more time for good measure. Bert was there to help. Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add
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Sesame Street: "Monster Manners" Preview

657 views / 0 likes - added 9 years ago

Help your little monsters learn to mind their manners! Guest stars include David Hyde Pierce, Cobie Smulders, Henry Cavill, Zach Efron, Colbie Caillat, Common, and Mark Ruffalo. Click this link for the "Monster Manners" DVD! http://www.amazon.com/Sesame-S
04:11 Popular
Sesame Street: Broken Grocery Bags (Classic Super Grover)

849 views / 0 likes - added 9 years ago

Somewhere on the street of Metro City, little Judy Finstermocker's grocery bag has broken and she has no way of carrying her groceries home. How can Grover help poor little Judy Finstermocker? Would roller skates be helpful? Some string to tie all her gro
06:13 Popular
Sesame Street: Grover Helps Piggies Up Creek (Super Grover 2.0)

1,449 views / 0 likes - added 9 years ago

Somewhere on a raft in a Mississippi Bayou, two little piggies were stranded up a creek. Here's the thing: they had gone to market and were all excited to go wee wee wee all the way home, when all of the sudden the wind at their sails stopped. Lucky or un
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Sesame Street: Where Does Paper Come From?

521 views / 0 likes - added 9 years ago

Paper starts out as a tree on a tree farm and is taken to a mill where the trees are made into a squishy pulp. The pulp is then rolled out into paper. Paper is then left blank for you to write on, or printed on by a printing press to make newspapers or bo
05:18 Popular
Sesame Street: Les Mousserables (Les Mis Parody)

832 views / 1 likes - added 9 years ago

Jean Bon-Bon is a very sad French guy in pursuit of cookies dans les rues de Paris (in the streets of Paris). He must figure out a way to survive and help his fellow Parisians find cookies. Subscribe to the Sesame Street Channel here: http://www.youtube.c
03:17 Popular
Sesame Street: Bert Helps Ernie Imagine

822 views / 1 likes - added 9 years ago

Ernie is afraid and can't sleep. His imagination is running wild with scary things like spooky scary monsters that go "Wubba Wubba" and stuff like that. Luckily enough, Bert has already composed a song to address the issue. Subscribe to the Sesame Street
02:17
Sesame Street: Twiddlebugs Outing

587 views / 0 likes - added 9 years ago

The Twiddlebugs are off to celebrate a surprise birthday party, but first they have to find a replacement for a cracked tire. What shape should a tire be? A square, a triangle or a circle? Help the Twiddlebugs get to their party! Subscribe to the Sesame S
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Sesame Street: Sarah Michelle Gellar is Disappointed

491 views / 0 likes - added 9 years ago

Elmo and Sarah Michelle Gellar are kind of disappointed. They were so excited to explain the meaning of the word, disappointed, but it didn't work out as they planned. They had their hopes up for a big sign and some cheerleaders and now that they didn't g
01:25
Sesame Street: "Be a Good Sport" Preview

605 views / 1 likes - added 9 years ago

Learning how to be a good sport can be hard for little monsters! When Elmo takes a game of Hot Potato too seriously, he hurts Abby's feelings. Can Leela help Elmo learn that winning isn't everything? Then it's on to the court for some hoops! Abby uses mag
02:26 Popular
Sesame Street: Elmo and Dwight Howard make a Strategy

740 views / 0 likes - added 9 years ago

A strategy is a plan to help solve a problem. Dwight Howard and Elmo were just discussing hypothetical strategies when all of a sudden Mr. Tiger showed up and started chewing on their basketball. Naturally, they came up with a strategy to get it back. Fin

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