This video defines the differences between discrete and continuous random variables, then works through examples of each.
Discretionary and mandatory outlays of the US federal government.
Using Title IX as an example of how the federal bureaucracy has rule making and discretionary authority as it implements laws.
An overview of what happens when the conditions for Hardy-Weinberg equilibrium are not fulfilled. Created by Sal Khan.
The index of refraction in a material isn't always the same for every wavelength. This is how prisms split white light into so many colors. Created by David SantoPietro.
Using a one-dimensional number line to visualize and calculate distance and displacement. Created by Sal Khan.
An introduction to the difference between distance traveled and displacement. Created by Sal Khan.
Relating angular displacement to distance traveled (or arc length) for a ball traveling in a circle. Derivation of formula for arc length.
What is the best way to distribute our points?
Divided government and gridlock in the United States.
John Dickerson discusses how the sitting president's party typically performs in midterm election years. John Dickerson is co-host of CBS This Morning. He was previously CBS News' Chief Washington Correspondent, Political Director and anchor of Face The Nation. Dickerson is also a contributor to Slate's Political Gabfest and to The Atlantic. During the 2016 presidential campaign, Dickerson moderated CBS News' two presidential debates. Prior to CBS, Dickerson was Slate Magazine's Chief Political correspondent and covered politics for twelve years for Time magazine.
Introduction to Accounts Payable. Created by Sal Khan.
This art history video discussion looks at Donald Judd's "Untitled", 1969, ten copper units, each 9 x 40 x 31 inches with 9 inch intervals (Guggenheim Museum, New York).
This art history video discussion examines Donatello's "St. Mark", 1411-13, marble, 93" (236 cm), Orsanmichele, Florence.
This art history video discussion examines Donatello's "David", bronze, late 1420s to the 1460s, likey the 1440s (Museo Nazionale del Bargello, Florence).
In this Smarthistory video Dr. Beth Harris and Dr. Steven Zucker discuss Donatello's "Equestrian Monument of Gattamelata" (Erasmo da Narni), 1445-53, bronze, in the Piazza del Santo, at Padua.
This art history video discussion examines Donatello's "Feast of Herod", panel on the baptismal font of Siena Cathedral, Siena, Italy, Gilded bronze,1423--1427.
This art history video discussion examines Donatello's "Madonna of the Clouds", c. 1425--35, marble, 33.1 x 32 cm / 13 1/16 x 12 5/8 inches (Museum of Fine Arts, Boston).
Learn about the Doppler effect and how it explains the change in frequency of a wave when its source and an observer are moving. Created by Sal Khan.
Understanding the differences between the dot and cross products. Created by Sal Khan.