Austria-Hungary. Ottoman empire. British, German, French and Russian empires.
Mia Epner, who works on security for a US national intelligence agency, explains how cryptography allows for the secure transfer of data online. This video explains 256-bit encryption, public and private keys, SSL & TLS and HTTPS.
Bulk transport: endocytosis, phagocytosis, and pinocytosis.
An overview of the membrane-bound structures that form the endomembrane system in eukaryotic cells.
Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus). Their role in protein secretion. Created by Sal Khan.
The theory of how mitochondria, chloroplasts and other membrane-bound organelles in eukaryotic cell likely arose from a symbiosis between aerobic prokaryotes and host anaerobic eukaryotic ancestors. Developed by Lynn Margulis.
Sal graphs elastic potential energy and kinetic energy for a mass on a spring and compares the total energy when with and without dissipative forces (friction).
Thinking about energy consumption for tilling land. Created by Sal Khan.
Solving the P/E conundrum by looking at a different valuation metric (enterprise value). Created by Sal Khan.
Enumerated and implied powers of the US federal government with a focus on the Commerce Clause and the Necessary and Proper Clause of the US Constitution.
Exploring the relationship between pH and enzyme activity.
Enzymes as catalysts for reactions in biological systems; discussion of substrates, active sites, induced fit, and activation energy.
Khan Academy video tutorial. Solving one and two step equations-this is made slightly more difficult than the Simple Equations tutorial by adding constants to the variable term.
Total surplus is maximized in a market at equilibrium. In this video, we talk about why this is and the math behind this assertion.
How are nominal real interest rates determined? In the money market! Learn about the money market in this video.
Debt vs. Equity. Market Capitalization, Asset Value, and Enterprise Value. Created by Sal Khan.
Escrow is a way of holding monies in a third-party account until all of the necessary aspects of a transaction have been carried out. In this video, learn about the role of escrow in real estate transactions, how escrow accounts work, and what an escrow agent is.
Overview of the estate tax. Created by Sal Khan.
An overview of the different types of evidence that support evolution, including homologous and analogous features and vestigial structures.
Evolution of political parties in picking candidates and voter mobilization.