The Cuban Missile Crisis. Created by Sal Khan.
In the third century BCE, between the Greek-influenced Seleucid Empire and the Indian Mauryan Empire lay a small and prosperous kingdom called Bactria. This video is about cultural syncretism—the blending of cultures. What kinds of culture emerges at the crossroads of empire? Let's find out together, as we learn about Greco-Buddhism and Nestorian Christianity.
More analysis of the cupcake business. Click here to download "Sal's Cupcake Factory" spreadsheet.. Created by Sal Khan.
Using our spreadsheet to show why prices decrease when utilization is low and prices increase when utilization is high. Click here to download the spreadsheets used in this video.. Created by Sal Khan.
Currency Effect on Trade. Created by Sal Khan.
Currency Effect on Trade Review. Created by Sal Khan.
If you track the value of a currency, you'll notice its value fluctuates. In this video, we introduce to how exchange rates can fluctuate. Created by Sal Khan.
If you track the value of a currency, you'll notice its value fluctuates. In this video, we introduce to how exchange rates can fluctuate. Created by Sal Khan.
Data on Chinese / U.S. balance of payments. [Economics playlist: Lesson 17 of 20]
The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin named electric charges with + and - signs. This convention came about 150 years before the discovery of the electron. Created by Willy McAllister.
Find the current due to closing a switch using equivalent resistance and Ohm's law.
How to calculate the current through a resistor in parallel using equivalent resistance and Ohm's law.
Google Security Princess Parisa Tabriz and Jenny Martin from Symantec introduce the most common types of cybercrime, including viruses, malware, DDOS attacks and phishing scams.
Cyrus the Great overthrows the Medians to establish the Achaemenid Empire (Persian Empire).
Learn about DNA (deoxyribonucleic acid). Overview of DNA bases, complementary base pairing, and the structure of the double helix.
Introduction to DNA sequencing.
Overview of DNA and chromatin regulation.
Introduction to DNA cloning.
How DNA is copied (replication). How information in DNA can be used to make a protein.
The DOM (Document Object Model)