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.
This video explains the potential of a capacitor and how they function in a circuit. By David Santo Pietro.
England didn't start its first successful colony in North America until 1607, more than 100 years after Columbus arrived in the New World. In this video, Kim discusses the problems that prevented England from following in Spain's footsteps, including struggles for the throne, war in Ireland, and economic depression.
WW2 Encryption is explored with a focus on the Enigma. Read more here. Created by Brit Cruise.
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.
Where we live in society plays a huge role in the environmental benefits and risks that we're exposed to.
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.
David explains the equation that represents the motion of a simple harmonic oscillator and solves an example problem. Created by David SantoPietro.
This art history video discussion examines the Equestrian Sculpture of Marcus Aurelius, bronze, c. 173-76 C.E., (Capitoline Museums, Rome). The original location of the sculpture is unknown though it had been housed in the Lateran Palace since the 8th century until it was placed in the center of the Piazza del Campidoglio by Michelangelo in 1538. The original is now indoors for purposes of conservation. Marcus Aurelius ruled 161-180 C.E.
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.
This art history video discussion examines the Caryatid (South Porch) and Ionic Column (North Porch), Erechtheion on the Acropolis, Athens, marble, 421-407 B.C.E. (British Museum, London). Mnesicles may have been the architect.
How can we communicate in the presence of noise? Created by Brit Cruise.