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Angular velocity and speed
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In uniform circular motion, angular velocity (𝒘) is a vector quantity and is equal to the angular displacement (Δ𝚹, a vector quantity) divided by the change in time (Δ𝐭). Speed is equal to the arc length traveled (S) divided by the change in time (Δ𝐭), which is also equal to |𝒘|R. And arc length (S) is equal to the absolute value of the angular displacement (|Δ𝚹|) times the radius (R).

Subject:
Physical Science
Physics
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/02/2021
Annual percentage rate (APR) and effective APR
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The annual percentage rate (APR) that you are charged on a loan may not be the amount of interest you actually pay. The amount of interest you effectively pay is greater the more frequently the interest is compounded. In this video, we calculate the effective APR based on compounding the APR daily. Created by Sal Khan.

Subject:
Economics
Social Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/25/2012
Anti-Federalists and Brutus No. 1
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Interpreting an excerpt of Brutus No. 1, the most well-known of what will be eventually called the "Anti-Federalist Papers," which argued against the ratification of the Constitution of 1787.

Subject:
Political Science
Social Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/16/2021
Antiparallel structure of DNA strands
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DNA is composed of two strands of nucleotides held together by hydrogen bonding. The strands each run from 5' to 3' and run in antiparallel, or opposite, directions from one another.

Subject:
Biology
Genetics
Life Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/16/2015
Arbitrage basics
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Arbitrage is taking advantage in price differences to earn a profit. In this video we explore arbitrage opportunities in options markets. Created by Sal Khan.

Subject:
Economics
Social Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/25/2012
The Articles of Confederation and Shays' Rebellion
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An introduction to the Articles of Confederation and its weaknesses. Shays' Rebellion was one of the catalysts for the Constitutional Convention of 1787.

Subject:
Political Science
Social Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/16/2021