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New videos from Khan Academy 2018-12-11T17:26:24.453770
Actualizado: hace 2 horas 34 mins

Writing proportional equations

Lun, 2018-10-01 22:03
Sal figures out the constant of proportionality when dealing with a constant rate.

Introduction to proportional relationships

Lun, 2018-10-01 22:03
Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality".

Social consequences of revolutionary ideals

Lun, 2018-09-24 23:30
The rhetoric of the American Revolution, which emphasized that "all men are created equal," led many to question existing social norms in the years after the Revolution. The ideals expressed by the Founders influenced the expansion of voting rights, the gradual abolition of slavery in the North, and a new role for women through republican motherhood.

The Ninth Amendment

Lun, 2018-09-24 20:33
The Ninth Amendment states that "The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people." But how do we know what those other rights are? In this video, Kim discusses the Ninth Amendment with scholars Kurt Lash and Jeffrey Rosen. To learn more about US Government and Politics, visit Khan Academy at https://www.khanacademy.org/humanities/ap-us-government-and-politics To read more about constitutional law, visit the National Constitution Center’s website: https://constitutioncenter.org On this site, leading scholars interact and explore the Constitution and its history. For each provision of the Constitution, experts from different political perspectives coauthor interpretive explanations when they agree and write separately when their opinions diverge.

The Seventh Amendment

Vie, 2018-09-21 22:35
The Seventh Amendment protects jury trials in civil cases. In this video, Kim discusses the Seventh Amendment with scholars Renee Lettow Lerner and Suja Thomas. To read more about constitutional law, visit the National Constitution Center’s website: https://constitutioncenter.org On this site, leading scholars interact and explore the Constitution and its history. For each provision of the Constitution, experts from different political perspectives coauthor interpretive explanations when they agree and write separately when their opinions diverge.  

Comparing European and Native American cultures

Mar, 2018-09-18 22:05
In this video, Kim discusses how mutual misunderstandings between Europeans and Native Americans often defined the early years of interaction and trade as each group sought to make sense of the other.

Unadopted amendments to the Bill of Rights

Vie, 2018-09-14 20:27
The original draft of the Bill of Rights had twelve amendments, not ten! What were those unadopted amendments? In this video, Kim discusses the unadopted amendments with scholar Fergus Bordewich. To learn more about US Government and Politics, visit Khan Academy at https://www.khanacademy.org/humanities/ap-us-government-and-politics To read more about constitutional law, visit the National Constitution Center’s website: https://constitutioncenter.org On this site, leading scholars interact and explore the Constitution and its history. For each provision of the Constitution, experts from different political perspectives coauthor interpretive explanations when they agree and write separately when their opinions diverge.

Plessy v. Ferguson

Jue, 2018-09-13 22:10
Plessy v. Ferguson was an 1896 Supreme Court case concerning whether "separate but equal" railway cars for black and white Americans violated the equal protection clause of the Fourteenth Amendment. In this video, Kim discusses the case with scholars Jamal Greene and Earl Maltz. To learn more about US Government and Politics, visit Khan Academy at https://www.khanacademy.org/humanities/ap-us-history To read more about constitutional law, visit the National Constitution Center’s website: https://constitutioncenter.org On this site, leading scholars interact and explore the Constitution and its history. For each provision of the Constitution, experts from different political perspectives coauthor interpretive explanations when they agree and write separately when their opinions diverge.

Ruth Asawa, Untitled

Jue, 2018-09-13 20:59
Ruth Asawa, Untitled, c. 1958, iron wire, 219.7 × 81.3 × 81.3 cm Crystal Bridges Museum of American Art. Speakers: Allison Glenn and Beth Harris.

Dred Scott v. Sandford

Mié, 2018-09-12 18:44
The 1857 Supreme Court case Dred Scott v. Sandford inflamed sectional tensions over slavery and propelled the United States toward civil war. In this video, Kim discusses the case with scholars Christopher Bracey and Timothy Huebner. To learn more about US History, visit Khan Academy at https://www.khanacademy.org/humanities/ap-us-history To read more about constitutional law, visit the National Constitution Center’s website: https://constitutioncenter.org On this site, leading scholars interact and explore the Constitution and its history. For each provision of the Constitution, experts from different political perspectives coauthor interpretive explanations when they agree and write separately when their opinions diverge.

Structure of human eye

Mié, 2018-09-12 00:23
Let's explore the major parts of our eye, and see what each one does. Created by Mahesh Shenoy

Convex mirror & applications

Mié, 2018-09-12 00:23
When curved mirrors have a reflecting surface on the outside, they are called convex mirrors. (vex stands for bulging out). Let's learn what they do and their applications in our day to day life. Created by Mahesh Shenoy

Why do stars twinkle (but planets don't)?

Mié, 2018-09-12 00:23
Let's explore what causes the twinkling effect of stars. We will also explore why planets, sun and moon don't seem to twinkle. Created by Mahesh Shenoy

Spherical & parabolic mirrors

Mié, 2018-09-12 00:23
In this video, we will explore two kinds of curved mirrors, parabolic and spherical mirrors. Created by Mahesh Shenoy

Magnification formula for mirrors

Mié, 2018-09-12 00:23
Let's explore how to calculate image height and it's nature (real or virtual) using magnification formula Created by Mahesh Shenoy

Power of lens

Mié, 2018-09-12 00:23
Power is an incredibly useful quantity when it comes to lenses. Let's find out what it is and where it is used. Created by Mahesh Shenoy

Newton's prism experiment

Mié, 2018-09-12 00:23
Let's explore how Sir Issac Newton experimentally proved that white light is made of all the colours of the rainbow. Created by Mahesh Shenoy

Mirror formula

Mié, 2018-09-12 00:23
Let's explore the mirror formula (1/f = 1/v+1/u) and see how to locate images without drawing any ray diagrams Created by Mahesh Shenoy

Presbyopia

Mié, 2018-09-12 00:23
Let's explore what are the symptoms and causes of Presbyopia. We will also see how bifocals correct them. Created by Mahesh Shenoy

Concave mirrors

Mié, 2018-09-12 00:23
In this video, we will see how concave mirrors focus a parallel beam of light to a single point. Created by Mahesh Shenoy

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