An overview of how the early Silk Road(s) facilitated trade and the spread of ideas, technology, disease and religion across Eurasia in the beginning of the Common Era.
Simple analysis of cost per job saved from stimulus. Created by Sal Khan.
In this video, Sal begins a walkthrough of the process of money creation using a highly simplified example. Created by Sal Khan.
How banks can actually create checking accounts under a fractional reserve system. Created by Sal Khan.
Showing how a merger arbitrage player might act if they were sure that a transaction would go through. Created by Sal Khan.
Simple model to understand r and g relationship. A discussion with Sal Khan.
Species number and relative abundance affect the diversity of a community. We can use Simpson's index of diversity to quantify and compare the diversity of different communities.
Sinai, Palestine and Mesopotamia campaigns
How did westward expansion exacerbate tensions over the institution of slavery? Sal and Kim discuss how slavery was an issue at the birth of the United States and how the issue became more and more central as the country expanded.
Snell's Law Example 1. Created by Sal Khan.
If all costs and benefits are captured by the supply and demand curves, then the market outcome is a quantity where marginal social costs equals marginal social benefit. But what if they don't? In this video, see how markets might produce an inefficient quantity.
How the the sodium-potassium (Na+/K+) pump works. Its role in establishing resting membrane potentials. Created by Sal Khan.
Understanding solar eclipses and lunar eclipses. Why don't we have a solar eclipse every new moon (every time the Moon is between the Earth and Sun)? Why don't we have a lunar eclipse every time the Earth is between the Sun and Moon.
Speed necessary for the space station to stay in orbit. Created by Sal Khan.
The actions of Spain and Portugal in the sixteenth century helped to create an interconnected global economy.
Learn about speciation, including allopatric and sympatric speciation and mechanisms of reproductive isolation. Created by Sal Khan.
What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs.
An introduction to Specular and Diffuse Reflection. Created by Sal Khan.
An introduction to Specular and Diffuse Reflection, part 2. Created by Sal Khan.
Created by Sal Khan.