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Videos uploaded by user “Khan Academy” for the 2016
Lac operon
 
11:05
Overview of gene regulation in the Lac operon. Discussion of CAP, cAMP, lac repressor and allolactose in regulation of lac operon.
Views: 320076 Khan Academy
Khan Academy’s 100&Change proposal: World-class diplomas for anyone, anywhere
 
01:30
Khan Academy is a nonprofit with a mission of providing a free, world-class education for anyone, anywhere. We’re entering a MacArthur Foundation competition, called 100&Change, for a $100 million grant to help solve a critical problem of our time. Millions of people lack the skills and credentials to participate in the global economy. To address this, our long-term goal is to develop internationally-recognized diplomas that provide direct access to economic and educational opportunities. We also plan to create free content and tools to help people earn the diplomas. If we win the grant, we’ll be able to accelerate the development of the diplomas, content, and tools. We want to connect people to real economic opportunity and unlock human potential for generations to come. If you believe in our vision, please share our video and comment below. PROBLEM STATEMENT Too many people lack the skills and credentials to participate meaningfully in the global economy. This is caused by problems at every stage of our education pipeline, from inadequate school access to low graduation rates. The United Nations estimates that 263 million children, including half of all refugee children, are not in school. In the United States alone, 55% of college students never earn a diploma. These challenges will be exacerbated in the near term by the global refugee crisis and in the long term by automation as new industries are created and old jobs made obsolete. For many of the millions shut out of the modern economy, like girls in oppressive societies, laid-off workers, refugees, and prisoners, traditional routes to employment are out of reach. Cost, time constraints, and social barriers limit access. Even those with degrees are often underemployed, as curricula are disconnected from employers’ needs. Online learning materials are becoming widely accessible, but they are not yet connected directly to economic empowerment. There have been many attempts to address aspects of this problem, but the solutions are often piecemeal, hard to scale, expensive, or locale-specific. Solving this problem is imperative for millions who want a better life for themselves and their families; for employers, who need an increasingly skilled entry-level workforce; for educational institutions, who want to help more people achieve their potential; and for society at large, as disenfranchisement and underemployment breed discontent, instability, and extremism. SOLUTION STATEMENT We plan to develop​ internationally-recognized diplomas that provide direct access to economic and educational opportunities. To support this, we will create free content and tools to help people earn our diplomas at their own pace, regardless of their incoming skills. An Afghan girl forbidden by the Taliban from attending school will now be able to study on her mobile phone, gain admission to a top university, and become a physicist. A father in Detroit who dropped out of high school will demonstrate his skills and work ethic to earn an entry-level job that supports his family. A school leader in Kenya will use these resources to ensure her students receive a rigorous education with international relevance. Khan Academy is already used by more than 100 million people around the world every year. These diplomas will connect current and future Khan Academy learners, including those in underserved communities and war-torn regions, to real economic opportunities. We will develop the diplomas in close partnership with educational institutions and employers to ensure relevance. In addition to academic skills, we will recognize metacognitive skills, like perseverance, not measured by traditional degrees. Unlike other offerings, we will track job placement and performance to measure the efficacy of the diplomas and continuously improve them. Tools will enable teachers and mentors to track learners’ progress and provide support. The initial release will be available in several major languages. Together, we can unlock the potential of hundreds of millions of people for generations to come.
Views: 323664 Khan Academy
Introduction to Grammar | Grammar | Khan Academy
 
02:46
Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English – by speaking it, by writing it, by reading this very sentence – you are a grammarian yourself! Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/introduction-to-nouns-the-parts-of-speech-grammar-khan-academy Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UCgk9hgdd2Uy6Fjfx_dK1j8A?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 1451397 Khan Academy
Progressive Aspect | The parts of speech | Grammar | Khan Academy
 
02:45
If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/progressive-verb-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/progressive-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/intro-to-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 183958 Khan Academy
Perfect Aspect | The parts of speech | Grammar | Khan Academy
 
02:31
If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/progressive-verb-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/perfect-progressive-aspect-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/intro-to-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 187560 Khan Academy
Transcription and mRNA processing | Biomolecules | MCAT | Khan Academy
 
10:25
Introduction to transcription including the role of RNA polymerase, promoters, terminators, introns and exons. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/speed-and-precision-of-dna-replication?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/leading-and-lagging-strands-in-dna-replication?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 517596 Khan Academy
Linking verbs | The parts of speech | Grammar | Khan Academy
 
03:02
In a previous video, we established that one thing verbs can do is show actions, like "the bear runs." Verbs can also link ideas to one another, like "the bear looks cheerful." Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/helping-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-future-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 357397 Khan Academy
Laplacian intuition
 
05:31
A visual understanding for how the Laplace operator is an extension of the second derivative to multivariable functions.
Views: 99038 Khan Academy
Worked example: Identifying isotopes and ions | Chemistry | Khan Acaddemy
 
03:45
Identifying isotopes and ions and accounting for electrons, protons and neutrons. Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/v/empirical-molecular-and-structural-formulas Missed the previous lesson? Watch here: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/v/atomic-number-mass-number-and-isotopes Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 177141 Khan Academy
Multivariable functions | Multivariable calculus | Khan Academy
 
06:02
An introduction to multivariable functions, and a welcome to the multivariable calculus content as a whole. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 409154 Khan Academy
Irregular plural nouns |– -f to -ves | The parts of speech | Grammar | Khan Academy
 
02:34
The plural of "dog" is "dogs", but what is the plural of "leaf"? Khan Academy's resident grammarian explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/e/irregular-plural-nouns--f-to--ves?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/irregular-plural-nouns-part-ii-the-parts-of-speech-grammar-khan-academy?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/common-and-proper-nouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 448448 Khan Academy
Leading and lagging strands in DNA replication | MCAT | Khan Academy
 
10:19
Roles of DNA polymerase, primase, ligase, helicase and topoisomerase in DNA replication. An explanation of leading and lagging strands. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/transcription-and-mrna-processing?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/telomeres-and-single-copy-dna-vs-repetitive-dna?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 392728 Khan Academy
Second derivatives | Advanced derivatives | AP Calculus AB | Khan Academy
 
02:27
Sal finds the second derivative of y=6/x_. Second derivative is the derivative of the derivative of y. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-second-derivatives/e/second-derivatives?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-implicit-diff/v/implicit-differentiation-1?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-diff-mul-rules/v/applying-chain-rule-twice?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan AcademyÕs AP Calculus AB channel: https://www.youtube.com/channel/UCyoj0ZF4uw8VTFbmlfOVPuw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 70790 Khan Academy
Introduction to verb aspect | The parts of speech | Grammar | Khan Academy
 
01:50
If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/simple-verb-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/simple-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-truly-irregular-irregular-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 164472 Khan Academy
DNA cloning and recombinant DNA | Biomolecules | MCAT | Khan Academy
 
11:08
Introduction to DNA cloning. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/hybridization-microarray?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/dna-libraries-generating-cdna?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 326101 Khan Academy
Perfect progressive aspect | The parts of speech | Grammar | Khan Academy
 
02:11
We use the perfect progressive aspect to talk about an action that was once ongoing, but has since completed, like "I had been waiting for twenty minutes." Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/progressive-perfect-verb-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/modal-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/perfect-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy"
Views: 169285 Khan Academy
Operons and gene regulation in bacteria
 
10:10
Looking at how regulatory DNA sequences can repress or promote gene transcription (particularly in bacteria operons).
Views: 149424 Khan Academy
Divergence intuition, part 1
 
06:21
Vector fields can be thought of as representing fluid flow, and divergence is all about studying the change in fluid density during that flow.
Views: 55116 Khan Academy
Who versus whom | The parts of speech | Grammar | Khan Academy
 
04:47
When do you use who, and when do you use whom? David, KA's grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/relative-pronouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/subject-and-object-pronouns-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/relative-pronouns-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy"
Views: 121111 Khan Academy
Run-ons and comma splices | Syntax | Khan Academy
 
04:38
A run-on sentence doesn’t separate any of its independent clauses with the punctuation that it needs, and a comma splice incorrectly separates two independent clauses with a comma, instead of a comma-and-coordinating-conjunction. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/recognizing-run-ons-and-comma-splices Watch the next lesson: https://www.khanacademy.org/humanities/grammar/syntax/v/subjects-and-predicates-syntax-khan-academy Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/syntax/v/recognizing-fragments-syntax-khan-academy Syntax on Khan Academy: Syntax is the ordering of language; it’s the study of how sentences work. In this section, we’ll scratch the surface of syntax as it applies to English grammar. Much more can be said about this subject, but we’ll save that for KA Linguistics. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 149403 Khan Academy
What is an operational amplifier?
 
11:34
The "operational amplifier" has two differential inputs and very high gain. Willy describes the symbol and properties of an op-amp. Op-amps are the backbone of analog circuit design.
Views: 399119 Khan Academy
Vector fields, introduction | Multivariable calculus | Khan Academy
 
05:05
Vector fields let you visualize a function with a two-dimensional input and a two-dimensional output. You end up with, well, a field of vectors sitting at various points in two-dimensional space. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 144004 Khan Academy
Biology overview
 
04:34
Biology overview
Views: 515766 Khan Academy
Genetic drift, bottleneck effect and founder effect | Biology | Khan Academy
 
10:47
Genetic drift, bottleneck effect and founder effect Watch the next lesson: https://www.khanacademy.org/science/biology/her/tree-of-life/v/taxonomy-and-the-tree-of-life Missed the previous lesson? Watch here: https://www.khanacademy.org/science/biology/her/heredity-and-genetics/v/discussions-of-conditions-for-hardy-weinberg Biology on Khan Academy: Biology, defined as the scientific study of life, is an incredibly broad and diverse field. In many ways, it's as kaleidoscopic and rich as living organisms themselves. Biologists study life at many scales, from cells to organisms to entire ecosystems. Begin your own biological journey here! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 106764 Khan Academy
Introduction to irregular verbs | The parts of speech | Grammar | Khan Academy
 
03:29
Words like "walk" and "look" are regular verbs – they behave in a predictable way. But there's a whole class of words in English, called irregular verbs, that are harder to predict. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-irregular-verbs?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-funky-ed-irregular-verb-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/helping-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 217030 Khan Academy
Choosing between its and it’s | The Apostrophe | Punctuation | Khan Academy
 
02:31
David and Paige explain the meaning of two English words that look and sound very similar but act very different: _its_ and _it's_. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/e/choosing-between-its-and-it-s Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/v/bonus-history-of-the-apostrophe-the-apostrophe-punctuation-khan-academy Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/v/apostrophes-and-plurals-the-apostrophe-punctuation-khan-academy Punctuation on Khan Academy: Punctuation is the collection of squiggles, dots, and lines that we use to separate sentences and their parts. Is a question mark punctuation? Yes, and so is an exclamation point! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 59932 Khan Academy
Lagrange multipliers, using tangency to solve constrained optimization
 
08:43
The Lagrange multiplier technique is how we take advantage of the observation made in the last video, that the solution to a constrained optimization problem occurs when the contour lines of the function being maximized are tangent to the constraint curve.
Views: 153645 Khan Academy
Commodity money vs. Fiat money | Financial sector | AP Macroeconomics | Khan Academy
 
08:18
A brief look at how money has evolved over time from being printed on valuable substances (commodity money), to merely representing those valuable substances (commodity-backed money), to not representing anything at all (fiat money). Created by Grant Sanderson. View more lessons or practice this subject at http://www.khanacademy.org/economics-finance-domain/ap-macroeconomics/ap-financial-sector/definition-measurement-and-functions-of-money-ap/v/commodity-money-vs-fiat-money?utm_source=youtube&utm_medium=desc&utm_campaign=apmacroeconomics AP Macroeconomics on Khan Academy: Welcome to Economics! In this lesson we'll define Economic and introduce some of the fundamental tools and perspectives economists use to understand the world around us! Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
Views: 54967 Khan Academy
Conceptual overview of light dependent reactions
 
09:05
Seeing how light energy can excite electrons which can be used to create ATP and NADPH (with oxygen as a byproduct).
Views: 133856 Khan Academy
That versus which | The parts of speech | Grammar | Khan Academy
 
05:41
Much has been made of the distinction between "that" and "which" in English, but it can mostly be summed up in two points: 1. "That" doesn't work so well with commas. 2. "Which" doesn't work so well with people. David the Grammarian explains. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/who-versus-whom-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/relative-pronouns-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy"
Views: 115666 Khan Academy
Translation (mRNA to protein) | Biomolecules | MCAT | Khan Academy
 
14:11
A deep dive into how mRNA is translated into proteins with the help of ribosomes and tRNA. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/differences-in-translation-between-prokaryotes-and-eukaryotes?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/speed-and-precision-of-dna-replication?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 414884 Khan Academy
Relative pronouns | The parts of speech | Grammar | Khan Academy
 
01:56
We use the relative pronouns to connect clauses together, like "the man *who sold the world* is coming over for dinner." David, KA's Grammar Fellow, explains. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/that-versus-which-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/reflexive-pronouns-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy"
Views: 147580 Khan Academy
Judging outliers in a dataset | Summarizing quantitative data | AP Statistics | Khan Academy
 
08:21
Using the inter-quartile range (IQR) to judge outliers in a dataset. View more lessons or practice this subject at http://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/stats-box-whisker-plots/v/judging-outliers-in-a-dataset?utm_source=youtube&utm_medium=desc&utm_campaign=apstatistics AP Statistics on Khan Academy: Meet one of our writers for AP¨_ Statistics, Jeff. A former high school teacher for 10 years in Kalamazoo, Michigan, Jeff taught Algebra 1, Geometry, Algebra 2, Introductory Statistics, and AP¨_ Statistics. Today he's hard at work creating new exercises and articles for AP¨_ Statistics. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc
Views: 60191 Khan Academy
Writing arithmetic series in sigma notation
 
04:08
Writing arithmetic series in sigma notation
Views: 35715 Khan Academy
Khan Academy Talent Search 2016
 
02:18
Learn more and submit your videos: http://khanacademy.org/talentsearch Khan Academy and YouTube are looking for brilliant explainers whose videos help students succeed in school and find joy in learning. We’re looking for submissions in a variety of subjects. If you have a passion for teaching and a knack for making challenging concepts seem simple, send us one of your videos! The top ten finalists will receive cash prizes—$3,000 for the grand prize winner and $300 each for nine finalists. All finalists will be considered for video creation contracts with Khan Academy. Check out our list of subjects and send us your video today! http://khanacademy.org/talentsearch
Views: 98705 Khan Academy
Introduction to singular and plural nouns | Grammar | Khan Academy
 
04:35
Learn the difference between singular and plural nouns. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/e/plural-and-singular-nouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/common-and-proper-nouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/introduction-to-nouns-the-parts-of-speech-grammar-khan-academy?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 657875 Khan Academy
Fourier Series introduction
 
05:13
Fourier Series introduction
Views: 462845 Khan Academy
Partial derivatives and graphs
 
06:55
One of the best ways to think about partial derivatives is by slicing the graph of a multivariable function. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 118043 Khan Academy
Introduction to verb tense | The parts of speech | Grammar | Khan Academy
 
01:46
An understanding of verb tense will make you into a TIME WIZARD, with the ability to control the past, the present, and the future – with your words, anyway. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-verb-tense?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/present-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/introduction-to-agreement-verbs-the-parts-of-speech?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 332908 Khan Academy
Zoroastrianism | World History | Khan Academy
 
07:57
A primer on the Zoroastrian religion. Discussions of Zarathustra, Ahura Mazda and the Avesta. Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/world-history/ancient-medieval/ancient-persia/v/cyrus-the-great-establishes-the-achaemenid-empire World History on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound peoples and nations together — and torn them apart. Take a journey through time and space and discover the fascinating history behind the complex world we inhabit today. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 93450 Khan Academy
Appositives | Punctuation | Grammar | Khan Academy
 
03:00
David and Paige, KA’s resident grammarians, cover appositives and how to use commas along with them. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/appositives?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/bonus-the-oxford-comma-the-comma-punctuation-khan-academy?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/commas-in-dialogue-the-comma-punctuation-khan-academy?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 126900 Khan Academy
Fluid flow and vector fields | Multivariable calculus | Khan Academy
 
03:35
A neat way to interpret a vector field is to imagine that it represents some kind of fluid flow. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 82254 Khan Academy
Background of the Carthaginians | World History | Khan Academy
 
06:41
Sal teaches an introduction to the Carthaginians and their roots as a Phoenician (Punic) colony. Watch the next lesson: https://www.khanacademy.org/humanities/world-history/ancient-medieval/roman-empire/v/punic-wars-between-rome-and-carthage Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/world-history/ancient-medieval/roman-empire/v/roman-social-and-political-structures World History on Khan Academy: From the earliest civilizations to the modern world, geography, religion, trade, and politics have bound peoples and nations together — and torn them apart. Take a journey through time and space and discover the fascinating history behind the complex world we inhabit today. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 36123 Khan Academy
2d curl intuition
 
03:54
A description of how vector fields relate to fluid rotation, laying the intuition for what the operation of curl represents.
Views: 30933 Khan Academy
Derivatives of inverse functions: from equation | AP Calculus AB | Khan Academy
 
05:04
Given that f(x)=_x_+3x-4, Sal evaluates the derivative of the inverse of f at x=-14. Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-diff-inverse-func/v/derivatives-of-inverse-functions-table?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-advanced/ab-diff-inverse-func/v/derivatives-of-inverse-functions?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan AcademyÕs AP Calculus AB channel: https://www.youtube.com/channel/UCyoj0ZF4uw8VTFbmlfOVPuw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 156750 Khan Academy
Establishing DNA as transformation principle
 
10:19
How the work of Griffith and later Avery, McCarty and MacLeod give strong evidence that DNA is "transformation principle" that encodes genetic information.
Views: 67933 Khan Academy
Simple Aspect | The parts of speech | Grammar | Khan Academy
 
01:32
If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/progressive-verb-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/progressive-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/intro-to-aspect?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Grammar channel: https://www.youtube.com/channel/UC8JT97hQjMVWeO0B-x8eVxQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 155816 Khan Academy
Intermediate value theorem | Existence theorems | AP Calculus AB | Khan Academy
 
08:05
Introduction to the Intermediate value theorem. If f is a continuous function over [a,b], then it takes on every value between f(a) and f(b) over that interval. Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-existence-theorems/ab-ivt-evt/v/extreme-value-theorem?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-existence-theorems/ab-ivt-evt/v/existence-theorems?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan AcademyÕs AP Calculus AB channel: https://www.youtube.com/channel/UCyoj0ZF4uw8VTFbmlfOVPuw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 329578 Khan Academy
Polymerase chain reaction (PCR) | Biomolecules | MCAT | Khan Academy
 
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Introduction to PCR (polymerase chain reaction). Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/dna-libraries-generating-cdna?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/gel-electrophoresis-dna?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 250649 Khan Academy
Dashes | Punctuation | Khan Academy
 
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Dashes are like little actors—they can behave like colons, pairs of commas, or parentheses. Learn how to use them in this video! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introduction-to-the-dash Watch the next lesson: https://www.khanacademy.org/miscellaneous-punctuation/v/hyphens Missed the previous lesson? Watch here: https://www.khanacademy.org/miscellaneous-punctuation/v/parentheses Punctuation on Khan Academy: Punctuation is the collection of squiggles, dots, and lines that we use to separate sentences and their parts. Is a question mark punctuation? Yes, and so is an exclamation point! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 102829 Khan Academy