Search Results: " fundamental force? quantum eraser answer | space time | pbs digital studio"

All Most Recent Most Viewed

10:26 Popular
Ecology - Rules for Living on Earth: Crash Course Biology #40

2,269 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
Featured
12:10 Popular
Chordates - CrashCourse Biology #24

1,635 views / 0 likes - added 9 years ago

Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal sarcopterygian osteich
08:51 Popular
Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21

1,767 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
11:44 Popular
Evolution: It's a Thing - Crash Course Biology #20

1,151 views / 0 likes - added 9 years ago

Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization. Crash Course Biology is now availabl
Featured
11:05 Popular
Population Genetics: When Darwin Met Mendel - Crash Course Biology #18

942 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
13:15 Popular
Photosynthesis: Crash Course Biology #8

1,056 views / 3 likes - added 9 years ago

Hank explains the extremely complex series of reactions whereby plants feed themselves on sunlight, carbon dioxide and water, and also create some by products we're pretty fond of as well. Crash Course Biology is now available on DVD! http://dftba.com/pro
11:45 Popular
In Da Club - Membranes&Transport: Crash Course Biology #5

743 views / 0 likes - added 9 years ago

Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like Cras
11:35 Popular
Eukaryopolis - The City of Animal Cells: Crash Course Biology #4

1,105 views / 0 likes - added 9 years ago

Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Se
11:32 Popular
Langston Hughes&the Harlem Renaissance: Crash Course Literature 215

877 views / 3 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
10:26
PTSD and Alien Abduction - Slaughterhouse-Five Part 2: Crash Course Literature 213

670 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
11:37 Popular
Race, Class, and Gender in To Kill a Mockingbird: Crash Course Literature 211

729 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
08:50 Popular
Was Gatsby Great? The Great Gatsby Part 2: Crash Course English Literature #5

863 views / 3 likes - added 9 years ago

SPOILER ALERT: This video assumes you've read the book. In which John Green continues to explore F. Scott Fitzgerald's novel, The Great Gatsby. In this installment, John looks into the titular Gatsby's purported Greatness. Gatsby's single-minded pursuit o
11:43 Popular
Like Pale Gold - The Great Gatsby Part I: Crash Course English Literature #4

754 views / 0 likes - added 9 years ago

In which John Green explores F. Scott Fitzgerald's novel of the Jazz Age, The Great Gatsby. John introduces you to Nick Carraway, Jay Gatsby, Daisy and Tom Buchanan, and the other characters in the novel, and tries to look beyond the surface story to figu
12:42 Popular
Of Pentameter&Bear Baiting - Romeo&Juliet Part I: Crash Course English Literature #2

716 views / 0 likes - added 9 years ago

In which John Green examines Romeo&Juliet by William Shakespeare. John delves into the world of Bill Shakespeare's famous star-crossed lovers and examines what the play is about, its structure, and the context in which it was written. Have you ever wanted
07:00 Popular
How and Why We Read: Crash Course English Literature #1

1,129 views / 2 likes - added 9 years ago

In which John Green kicks off the Crash Course Literature mini series with a reasonable set of questions. Why do we read? What's the point of reading critically. John will argue that reading is about effectively communicating with other people. Unlike a d
15:40 Popular
Obamanation: Crash Course US History #47

777 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:53 Popular
George HW Bush and the End of the Cold War: Crash Course US History #44

971 views / 2 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:24
Ford, Carter, and the Economic Malaise: Crash Course US History #42

669 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
14:51 Popular
The Rise of Conservatism: Crash Course US History #41

715 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
15:15 Popular
The 1960s in America: Crash Course US History #40

925 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
11:58 Popular
Civil Rights and the 1950s: Crash Course US History #39

1,189 views / 5 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:40 Popular
America in World War I: Crash Course US History #30

912 views / 2 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. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:51 Popular
Gilded Age Politics:Crash Course US History #26

798 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 keep the channel producing great conten
12:45 Popular
Growth, Cities, and Immigration: Crash Course US History #25

1,256 views / 2 likes - added 9 years ago

In which John Green teaches you about the massive immigration to the United States during the late 19th and early 20th century. Immigrants flocked to the US from all over the world in this time period. Millions of Europeans moved to the US where they drov
12:01 Popular
The Civil War, Part I: Crash Course US History #20

1,326 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
14:17 Popular
The Election of 1860&the Road to Disunion: Crash Course US History #18

884 views / 1 likes - added 9 years ago

In which John Green teaches you about the election of 1860. As you may remember from last week, things were not great at this time in US history. The tensions between the North and South were rising, ultimately due to the single issue of slavery. The Nort
14:47 Popular
19th Century Reforms: Crash Course US History #15

957 views / 1 likes - added 9 years ago

In which John Green teaches you about various reform movements in the 19th century United States. From Utopian societies to the Second Great Awakening to the Abolition movement, American society was undergoing great changes in the first half of the 19th c
15:05 Popular
Age of Jackson: Crash Course US History #14

953 views / 2 likes - added 9 years ago

In which John Green teaches you about the presidency of Andrew Jackson So how did a president with astoundingly bad fiscal policies end up on the $20 bill? That's a question we can't answer, but we can tell you how Jackson got to be president, and how he
13:57 Popular
Where US Politics Came From: Crash Course US History #9

765 views / 0 likes - added 9 years ago

In which John Green teaches you where American politicians come from. In the beginning, soon after the US constitution was adopted, politics were pretty non-existent. George Washington was elected president with no opposition, everything was new and excit
Featured
12:41 Popular
Who Won the American Revolution?: Crash Course US History #7

1,049 views / 1 likes - added 9 years ago

In which John Green teaches you about the American Revolution. And the Revolutionary War. I know we've labored the point here, but they weren't the same thing. In any case, John will teach you about the major battles of the war, and discuss the strategies
Featured
10:40 Popular
The Seven Years War and the Great Awakening: Crash Course US History #5

35.9k views / 309 likes - added 9 years ago

In which John Green teaches you about the beginnings of the American Revolution in a video titled The Seven Years War. Confusing? Maybe. John argues that the Seven Years War, which is often called the French and Indian War in the US, laid a lot of the gro
09:42 Popular
The History of Atomic Chemistry: Crash Course Chemistry #37

1,056 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.
10:52 Popular
Orbitals: Crash Course Chemistry #25

893 views / 0 likes - added 9 years ago

In this episode of Crash Course Chemistry, Hank discusses what Molecules actually look like and why, some quantum-mechanical three dimensional wave functions are explored, he touches on hybridization, and delves into sigma and pi bonds. -- Table of Conten
11:24 Popular
Enthalpy: Crash Course Chemistry #18

1,140 views / 0 likes - added 9 years ago

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us - like that any bond between two atoms co
09:26
Energy&Chemistry: Crash Course Chemistry #17

653 views / 0 likes - added 9 years ago

Grumpy Professor Hank admits to being wrong about how everything is chemicals. But he now wants you to listen as he blows your mind with a new sweeping statement: everything (yes, really everything this time) is energy. What?! This week, Hank takes us on
11:55 Popular
Partial Pressures&Vapor Pressure: Crash Course Chemistry #15

728 views / 0 likes - added 9 years ago

This week we continue to spend quality time with gases, more deeply investigating some principles regarding pressure - including John Dalton's Law of Partial Pressures, vapor pressure - and demonstrating the method for collecting gas over water. Table of
11:35
Real Gases: Crash Course Chemistry #14

577 views / 0 likes - added 9 years ago

Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren't all that constant; how the ideal gas law we've spent the past two weeks with has to be corrected for volume because atoms
11:45 Popular
Ideal Gas Problems: Crash Course Chemistry #13

936 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
09:03 Popular
The Ideal Gas Law: Crash Course Chemistry #12

1,164 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
10:59
The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3

637 views / 0 likes - added 9 years ago

Today's Crash Course Chemistry takes a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Frenchman put the puzzle pieces together - Hank tells the story of how we went from alchemists to ch
10:12 Popular
The Nucleus: Crash Course Chemistry #1

924 views / 1 likes - added 9 years ago

Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to f
10:48 Popular
Social Thinking: Crash Course Psychology #37

723 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.
10:20 Popular
Emotion, Stress and Health: Crash Course Psychology #26

974 views / 1 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.
11:08 Popular
Measuring Personality: Crash Course Psychology #22

1,043 views / 1 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.
10:15 Popular
Adolescence: Crash Course Psychology #20

1,030 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.
13:33 Popular
Japan in the Heian Period and Cultural History: Crash Course World History 227

1,328 views / 7 likes - added 9 years ago

In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy...in Japan. The Heian period in Japan lasted from 794CE to 1185CE, and it was an interesting time in Japan. Rather than being known for a thriving
11:18 Popular
The Vikings! - Crash Course World History 224

1,311 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
13:16 Popular
Charles V and the Holy Roman Empire: Crash Course World History #219

1,103 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
12:51 Popular
Population, Sustainability, and Malthus: Crash Course World History 215

1,146 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
12:31 Popular
The Railroad Journey and the Industrial Revolution: Crash Course World History 214

753 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
12:59 Popular
The End of Civilization (In the Bronze Age): Crash Course World History 211

873 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
09:10 Popular
HOW World War I Started: Crash Course World History 209

1,521 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
10:02 Popular
Peripheral Nervous System: Crash Course A&P #12

1,543 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
09:51 Popular
The Moon: Astronomy #12

962 views / 1 likes - added 9 years ago

Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation. This episode is brought to you by Squarespace: http://www.squarespace.com/crashcourse -- Table of Contents Many Millio
10:14 Popular
The Earth: Crash Course Astronomy #11

889 views / 0 likes - added 9 years ago

Phil starts the planet-by-planet tour of the solar system right here at home, Earth. -- Table of Contents Earth is a Planet 0:03 Layers of Earth 1:25 The Magnetic Field 5:10 Atmosphere and the Human Influence 6:14 -- PBS Digital Studios: http://youtube.co
12:04 Popular
The Sun: Crash Course Astronomy #10

804 views / 2 likes - added 9 years ago

Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet. This epis
10:17 Popular
Introduction to the Solar System: Crash Course Astronomy #9

989 views / 1 likes - added 9 years ago

In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squaresp
09:47 Popular
Tides: Crash Course Astronomy #8

1,101 views / 1 likes - added 9 years ago

Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions. -- Gravity Over Distance 0:44 Tidal Force Para
10:03 Popular
The Gravity of the Situation: Crash Course Astronomy #7

774 views / 0 likes - added 9 years ago

In today's episode, Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse -- Gravity is a Force 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Weightless Mass 7:0
12:01
Telescopes: Crash Course Astronomy #6

678 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
10:32 Popular
Eclipses: Crash Course Astronomy #5

840 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
09:46 Popular
Moon Phases: Crash Course Astronomy #4

1,976 views / 6 likes - added 9 years ago

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases. -- Why the Moon Has Phases 0:36.1 Spheres in Orbit 1:05.4 Name of the Moon Phases 2:25.5 How We See It 7:48.2 -- PBS Digital Studios: http://youtube
09:29
Cycles in the Sky: Crash Course Astronomy #3

637 views / 0 likes - added 9 years ago

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of
11:17
Naked Eye Observations: Crash Course Astronomy #2

676 views / 0 likes - added 9 years ago

Today on Crash Course Astronomy, Phil invites you to head outside and take a look at all the incredible things you can see with your naked eye. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of the
12:12 Popular
Introduction to Astronomy: Crash Course Astronomy #1

732 views / 3 likes - added 9 years ago

Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" -- Table of Contents: What is Astronomy? 3:00 Who Studie
08:12
Congressional Leadership: Crash Course Government and Politics #8

655 views / 0 likes - added 9 years ago

This week Craig Benzine explores the leadership structure of congress. We’ll break out the clone machine to examine the responsibilities of the speaker of the house, the majority and minority leaders as well as the majority and minority whips in both the
08:28 Popular
Congressional Committees: Crash Course Government and Politics #7

704 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
08:58
Congressional Elections: Crash Course Government and Politics #6

674 views / 0 likes - added 9 years ago

This week Craig Benzine talks about the importance of elections. But he isn’t going to focus on presidential elections, but instead those of the strongest part of our government: congressional elections. Craig will talk about the frequency of elections in
08:57 Popular
Constitutional Compromises: Crash Course Government and Politics #5

800 views / 1 likes - added 9 years ago

In which Craig Benzine teaches you about the compromises met in ratifying the U.S. Constitution. The United State’s didn’t always have its current system of government. Actually, this is it’s second attempt. Craig will delve into the failures (and few suc
09:15 Popular
Federalism: Crash Course Government and Politics #4

706 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about federalism, or the idea that in the United States, power is divided between the national government and the 50 state governments. Craig will teach you about how federalism has evolved over the history of the US, an
08:31 Popular
Separation of Powers and Checks and Balances: Crash Course Government and Politics #3

1,700 views / 2 likes - added 9 years ago

In which Craig Benzine teaches you about the US Governments Separation of powers and the system of checks and balances. In theory, the Legislative Branch, the Executive Branch, and the Judicial Brach are designed to keep each other in check, and to keep a
09:05 Popular
The Bicameral Congress: Crash Course Government and Politics #2

710 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about the United States Congress, and why it's bicameral, and what bicameral means. Craig tells you what the Senate and House of Representatives are for, some of the history of the institutions, and reveal to you just ho
06:47 Popular
Introduction: Crash Course U.S. Government and Politics

823 views / 0 likes - added 9 years ago

In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it actually does functi
11:00
Magnetism 7

530 views / 0 likes - added 9 years ago

The magnetic force that two current-carrying wires exert on each other. More free lessons at: http://www.khanacademy.org/video?v=l3hw0twZSCc
10:55
Magnetism 5

504 views / 0 likes - added 9 years ago

Magnetic force on a wire carrying current. More free lessons at: http://www.khanacademy.org/video?v=jQ2nD8ZGeEw
08:42
Fluids (part 5)

462 views / 0 likes - added 9 years ago

Introduction to Archimedes' principle and buoyant force. More free lessons at: http://www.khanacademy.org/video?v=vzID7ds600c
09:39
Spring potential energy example (mistake in math)

487 views / 0 likes - added 9 years ago

A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!) More free lessons at: http://www.khanacademy.org/video?v=P3QV9ktuYlQ
06:36
Space Station Speed in Orbit

670 views / 0 likes - added 9 years ago

Speed necessary for the space station to stay in orbit More free lessons at: http://www.khanacademy.org/video?v=9BNkmfHYYYI
10:13 Popular
Acceleration Due to Gravity at the Space Station

736 views / 0 likes - added 9 years ago

What is the acceleration due to gravity at the space station More free lessons at: http://www.khanacademy.org/video?v=R5CRZONOHCU
04:48
Loop De Loop Answer part 2

602 views / 0 likes - added 9 years ago

Figuring out the car's average speed while completing the loop de loop More free lessons at: http://www.khanacademy.org/video?v=zcnnZz2pCSg
06:05
Loop De Loop Answer part 1

582 views / 0 likes - added 9 years ago

Figuring out the minimum speed at the top of the loop de loop to stay on the track More free lessons at: http://www.khanacademy.org/video?v=4SQDybFjhRE
10:47
Centripetal Force and Acceleration Intuition

641 views / 0 likes - added 9 years ago

The direction of the force in cases of circular motion at constant speeds More free lessons at: http://www.khanacademy.org/video?v=vZOk8NnjILg
09:10 Popular
Force of Friction Keeping Velocity Constant

738 views / 0 likes - added 9 years ago

Calculating the coefficient of kinetic friction (correction made in next video) More free lessons at: http://www.khanacademy.org/video?v=iA7Thhnzc64
00:51
Correction to Force of Friction Keeping the Block Stationary

477 views / 0 likes - added 9 years ago

Correction to Force of Friction Keeping the Block Stationary More free lessons at: http://www.khanacademy.org/video?v=BukTc4q9BMc
08:41 Popular
Force of Friction Keeping the Block Stationary

820 views / 0 likes - added 9 years ago

Block of wood kept stationary by the force of friction (Correction made in next video) More free lessons at: http://www.khanacademy.org/video?v=v8ODIMqbQ44
12:43 Popular
Inclined Plane Force Components

705 views / 0 likes - added 9 years ago

Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane More free lessons at: http://www.khanacademy.org/video?v=TC23wD34C7k
11:49
Normal Force in an Elevator

548 views / 0 likes - added 9 years ago

How the normal force changes when an elevator accelerates More free lessons at: http://www.khanacademy.org/video?v=hoRsHNSrMpc
07:18
Normal Force and Contact Force

595 views / 0 likes - added 9 years ago

The force that keeps a block of ice from falling towards the center of the earth More free lessons at: http://www.khanacademy.org/video?v=1WOrgrIcQZU
09:47
Different Way to Determine Time in Air

649 views / 0 likes - added 9 years ago

Another way to determine time in the air given an initial vertical velocity More free lessons at: http://www.khanacademy.org/video?v=_NWc3C3cTNA
07:09
Deriving Max Projectile Displacement Given Time

520 views / 0 likes - added 9 years ago

Deriving a formula for maximum projectile displacement as a function of elapsed time More free lessons at: http://www.khanacademy.org/video?v=P7LKEkcNibo
08:51
Projectile Height Given Time

588 views / 0 likes - added 9 years ago

Figuring out how high a ball gets given how long it spends in the air More free lessons at: http://www.khanacademy.org/video?v=IYS4Bd9F3LA
16:18
Plotting Projectile Displacement, Acceleration, and Velocity

508 views / 0 likes - added 9 years ago

Plotting projectile displacement, acceleration, and velocity as a function to change in time More free lessons at: http://www.khanacademy.org/video?v=T0zpF_j7Mvo
09:58
Deriving Displacement as a Function of Time, Acceleration and Initial Velocity

501 views / 0 likes - added 9 years ago

Deriving displacement as a function of time, constant acceleration and initial velocity More free lessons at: http://www.khanacademy.org/video?v=wlB0x9W-qBU
09:26
Why Distance is Area under Velocity-Time Line

491 views / 0 likes - added 9 years ago

Understanding why distance is area under velocity-time line More free lessons at: http://www.khanacademy.org/video?v=d-_eqgj5-K8
08:08
Airbus A380 Take-off Time

510 views / 0 likes - added 9 years ago

Figuring how long it takes an a380 to take off given a constant acceleration More free lessons at: http://www.khanacademy.org/video?v=p4DTormtEG0
05:00
Displacement from Time and Velocity Example

477 views / 0 likes - added 9 years ago

Worked example of calculating displacement from time and velocity More free lessons at: http://www.khanacademy.org/video?v=lQ-dvt3V4yQ
09:35
Solving for Time

487 views / 0 likes - added 9 years ago

Simple example of solving for time given distance and rate More free lessons at: http://www.khanacademy.org/video?v=awzOvyMKeMA
19:12 Popular
Lin Alg: Unique rowspace solution to Ax=b

733 views / 0 likes - added 9 years ago

Showing that, for any b that is in the column space of A, there is a unique member of the row space that is the "smallest" solution to Ax=b More free lessons at: http://www.khanacademy.org/video?v=czIYvs9zj2g
19:50
Lin Alg: Visualizations of Left Nullspace and Rowspace

646 views / 0 likes - added 9 years ago

Relationship between left nullspace, rowspace, column space and nullspace. More free lessons at: http://www.khanacademy.org/video?v=GW8ZPjGlk24
12:48
Dimension of the Column Space or Rank

652 views / 0 likes - added 9 years ago

Dimension of the Column Space or Rank More free lessons at: http://www.khanacademy.org/video?v=JUgrBkPteTg
13:59 Popular
Dimension of the Null Space or Nullity

810 views / 0 likes - added 9 years ago

Dimension of the Null Space or Nullity More free lessons at: http://www.khanacademy.org/video?v=abYAUqs_n6I
21:11
Visualizing a Column Space as a Plane in R3

673 views / 0 likes - added 9 years ago

Determining the planar equation for a column space in R3 More free lessons at: http://www.khanacademy.org/video?v=EGNlXtjYABw
25:13 Popular
Null Space and Column Space Basis

870 views / 0 likes - added 9 years ago

Figuring out the null space and a basis of a column space for a matrix More free lessons at: http://www.khanacademy.org/video?v=_uTAdf_AsfQ
10:40
Column Space of a Matrix

634 views / 0 likes - added 9 years ago

Introduction to the column space of a matrix More free lessons at: http://www.khanacademy.org/video?v=st6D5OdFV9M
11:35
Null Space 3: Relation to Linear Independence

672 views / 0 likes - added 9 years ago

Understanding how the null space of a matrix relates to the linear independence of its column vectors More free lessons at: http://www.khanacademy.org/video?v=vFctYRhK2M0
13:08
Null Space 2: Calculating the null space of a matrix

699 views / 0 likes - added 9 years ago

Calculating the null space of a matrix More free lessons at: http://www.khanacademy.org/video?v=qvyboGryeA8
10:23
Introduction to the Null Space of a Matrix

686 views / 0 likes - added 9 years ago

Showing that the Null Space of a Matrix is a valid Subspace More free lessons at: http://www.khanacademy.org/video?v=jCwRV1QL_Xs
12:22
Exponential Decay Formula Proof (can skip, involves Calculus)

652 views / 0 likes - added 9 years ago

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at: http://www.khanacademy.org/video?v=H7nrVDV8ahc
09:38
Myosin and Actin

518 views / 0 likes - added 9 years ago

How myosin and actin interact to produce mechanical force. More free lessons at: http://www.khanacademy.org/video?v=zopoN2i7ALQ
04:12
Correction Calendar Notation

569 views / 0 likes - added 9 years ago

Correcting the time difference calculation by taking into account that there is no year 0 More free lessons at: http://www.khanacademy.org/video?v=N06Jy-gQog8
10:30
Four Fundamental Forces

455 views / 0 likes - added 9 years ago

Gravity, Weak, Electromagnetic and Strong More free lessons at: http://www.khanacademy.org/video?v=FEF6PxWOvsk
06:18
Cosmological Time Scale 2

507 views / 0 likes - added 9 years ago

Cosmological Time Scale 2 More free lessons at: http://www.khanacademy.org/video?v=LO7-3MpWijU
07:07
Cosmological Time Scale 1

568 views / 0 likes - added 9 years ago

Cosmological Time Scale 1 More free lessons at: http://www.khanacademy.org/video?v=DRtLXagrMHw
10:04 Popular
Tangent Line Hyperbola Relationship (very optional)

1,213 views / 0 likes - added 9 years ago

How a tangent line relates to a hyperbola. Might be useful for some competitive exams where there isn't time to derive (like we are doing in this video) More free lessons at: http://www.khanacademy.org/video?v=c_8QQbVQKU0
08:58
Projectile motion (part 4)

449 views / 0 likes - added 9 years ago

Solving for time when you are given the change in distance, acceleration, and initial velocity More free lessons at: http://www.khanacademy.org/video?v=-W3RkgvLrGI
09:05
Projectile motion (part 3)

504 views / 0 likes - added 9 years ago

An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration More free lessons at: http://www.khanacademy.org/video?v=Y5cSGxdDHz4
09:38
Introduction to motion (part 2)

492 views / 0 likes - added 9 years ago

More on how velocity, distance, acceleration and time relate to each other.
10:07
The Beauty of Algebra

495 views / 0 likes - added 9 years ago

Why the abstraction of mathematics is so fundamental More free lessons at: http://www.khanacademy.org/video?v=kpCJyQ2usJ4
08:17
Time Value of Money

538 views / 0 likes - added 9 years ago

Overview of the time value, present value and future value of money More free lessons at: http://www.khanacademy.org/video?v=733mgqrzNKs
02:56
One-time pad

570 views / 0 likes - added 9 years ago

More free lessons at: http://www.khanacademy.org/video?v=FlIG3TvQCBQ
02:49 Popular
Probability Space

729 views / 0 likes - added 9 years ago

Basics of what a probability space is
03:52 Popular
The Fundamental Theorem of Arithmetic

887 views / 0 likes - added 9 years ago

The Fundamental Theorem of Arithmetic More free lessons at: http://www.khanacademy.org/video?v=8CluknrLeys
14:46
US History Overview 3 - WWII to Vietnam

597 views / 0 likes - added 9 years ago

World War II, Hitler, Cold War, Bay of Pigs, Cuban Missile Crisis and the Space Race More free lessons at: http://www.khanacademy.org/video?v=j2eKaxU-8kA

>> View fundamental force? quantum eraser answer | space time | pbs digital studio web videos