Working through a calculation for K-Ar dating (good to have some prior experience with e and logarithms). Created by Sal Khan.
Analyzing planned expenditures versus actual output using the Keynesian Cross. Created by Sal Khan.
More on shifting aggregate planned expenditures. Connecting to the multiplier. Created by Sal Khan.
Contrasting Keynesian and Classical Thinking. Created by Sal Khan.
Biology is the study of life. Here, you can browse videos, articles, and exercises by topic. We keep the library up-to-date, so you may find new or improved content over time.
This course covers Limits and Continuity, Derivatives: definition and basic rules; Derivatives: chain rule and other advanced topics; Applications of derivatives; Analyzing Functions; Integrals; Differential equations; and Applications of integrals.
Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computing, history, art history, economics, and more, including K-14 and test preparation (SAT, Praxis, LSAT) content. We focus on skill mastery to help learners establish strong foundations, so there's no limit to what they can learn next!
Mastery Lessons:
• Atomic structure and properties
• Molecular and ionic compound structure and properties
• Intermolecular forces and properties
• Chemical reactions
• Kinetics
• Thermodynamics
• Equilibrium
• Acids and bases
• Applications of thermodynamics
This course covers Complex Number, Polynomials, Composite Functions, Trigonometry, Vectors, Matrices, Series, Conic Sections, and Probability and combinatorics.
Overview of the Knights Templar and their role as international banking pioneers during the Crusades.
The origins and progress of the Korean War. Created by Sal Khan.
The origins and progress of the Korean War. Created by Sal Khan.
London InterBank Offer Rate. Created by Sal Khan.
How the theory of liquidity preference drives demand for money and the LM (liquidity preference-money supply) curve. Created by Sal Khan.
The basis of the labor supply curve is the tradeoff of labor and leisure. When wages increase, the opportunity cost of leisure increases and people supply more labor. Interestingly, this is not always the case! At higher wages, the marginal benefit of higher wages becomes lower and when it drops below the marginal benefit of leisure, people switch to more leisure and less labor. This leads to the rather unusual looking backward bending labor supply curve.
Overview of gene regulation in the Lac operon. Discussion of CAP, cAMP, lac repressor and allolactose in regulation of lac operon.
Lactic acid fermentation. How organisms like lactobacillus convert pyruvic acid to lactic acid and oxidize NADH to NAD+ in the process.
Primer on the differences of language and religion that helped to propel World War I. Created by Sal Khan.
A series of independence movements in the Americas in the late 1700s and early 1800s are sparked by the Enlightenment and conflict in Europe. This includes revolutions that will lead to the United States, Haiti, Mexico, Venezuela, Columbia, Panama, Bolivia, Peru, Equador, Paraguay, Uruguay, Brazil and Argentina.
Sal discusses how energy can't be created or destroyed in an isolated system, and works an example of how energy is transformed when a ball falls toward the Earth.
The law of demand states that as the price of a good decreases, the quantity demanded of that good increases. In other words, the law of demand states that the demand curve, as a function of price and quantity, is always downward sloping. In this video, we explore the law of demand and its implications for graphing demand curves. Created by Sal Khan.