Using some basic calculus to show that marginal revenue has twice the slope of the demand curve for a monopolist. Created by Sal Khan.
In this video we explore how aspects of an option's expiration affect the option's price. Created by Sal Khan.
Overview of the nucleus, endoplasmic reticulum, Golgi bodies, vacuoles, mitochondria, chloroplasts and lysosomes.
How did people live, survive, and thrive in the Old Stone Age?
An overview of the question of how life first arose on Earth. Created by Sal Khan.
Osmosis of water from an area of lower to an area of higher solute concentration across a semipermeable membrane.
Overview of the Ottoman, Safavid and Mughal Empires and their Turko-Mongol origins. Discussions of devshirme, janissaries and ghulams. Gunpowder empires.
Conquering armies, monumental architecture, and beautiful art: how did Rome achieve all of this? Sal provides an overview of the origins of the Roman Empire.
The beginnings of Italian Fascism. Created by Sal Khan
Overview of animal and plant cells. Topics include cell walls, vacuoles, chloroplasts, peroxisomes, lysosomes, mitochondria, etc.
Overview of cell signaling. Autocrine, paracrine and endocrine signaling.
Overview: glycolysis, pyruvate oxidation, the citric acid cycle (Krebs cycle), and oxidative phosphorylation.
Big picture of how money enters circulation and how lending can increase the money supply. Created by Sal Khan.
Primary, secondary, tertiary and quaternary protein structure. Beta pleated sheets and alpha helices.
The European Middle Ages (or Medieval Time) is roughly 1000 year span of time from the end of the Roman Empire (in the West) to the beginning of the Renaissance. This video gives as overview with maps and touches on the key events like the Great Schism, Crusades and Black Death.
How oxidation of co-enzymes like NADH can lead to the production of ATP through oxidative phosphorylation.
Ozone layer and eukaryotes show up in the Proterozoic eon. Great oxygenation event (oxygen catastrophe). Created by Sal Khan.
A situation where the price to earnings ratio seems to not fairly price an asset. Created by Sal Khan.
Discussion of the price-to-earnings ratio. Created by Sal Khan.
The shape of a production possibility curve (PPC) reveals important information about the opportunity cost involved in producing two goods. When the PPC is a straight line, opportunity costs are the same no matter how far you move along the curve. When the PPC is concave (bowed out), opportunity costs increase as you move along the curve. When the PPC is convex (bowed in), opportunity costs are decreasing.