Second Law of Thermodynamics and entropy: the entropy of the universe constantly increases.
Xerxes launches an attack on Greece by land and by sea, culminating in the Battle of Thermopylae.
S-waves and P-waves. Created by Sal Khan.
The judicial doctrine of selective incorporation and how it uses the due process clause as its justification.
An overview of Senate checks on presidential appointments.
Senate confirmation as a check on the Judicial Branch.
Role of Senate in ratifying treaties and confirming appointments. Role of unanimous consent, holds, filibusters and cloture in the United States Senate.
Separation of powers and checks and balances and Federalist 51.
An introduction to the Serbian and Macedonian fronts
An introduction to Serbian losses in World War I
An overview of how a manor was organized in Medieval Europe. Discussion of serfs and serfdom.
Thinking about why a severe contango could be bearish. Created by Sal Khan.
At the end of the Mythic Period of China's history, the Xia dynasty gave way to the Shang Dynasty… if the Xia really existed at all! Sal gives an overview of the Xia, Shang, and Zhou Dynasties—societies that lived between the Yellow and Yangtze Rivers—and discusses their cultural practices, their bronzeworking, and the origins of a Chinese identity.
If a factor of aggregate demand changes in response to anything other than a change in the price level shifts aggregate demand. In this video, we explore the shifters of AD and factors that might shift aggregate demand to the left (a decrease in AD) or to the right (an increase in AD). Created by Sal Khan.
Changes in the demand for labor affect wage rates. Learn why labor demand changes, and the effect of changes in the demand for labor on labor markets.
An overview of the Japanese Medieval period in which Shoguns ruled under the bakufu (shogunate) feudal system. Discussion of daimyo during the Kamakura and Muromachi/Ashikaga periods. Samurai and bushido.
What does it mean to short a stock? Created by Sal Khan.
More on the mechanics of shorting stock. Created by Sal Khan.
We claim that the short-run aggregate supply (SRAS) curve is upward sloping, but why? In this video, we explore the justifications for the aggregate supply curve to be upward sloping in the short-run. Created by Sal Khan.
The interaction of SRAS and AD determine national income. We can compare that national income to the full employment national income to determine the current phase of the business cycle. An economy is said to be in long-run equilibrium if the short-run equilibrium output is equal to the full employment output.