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Basic shorting
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CC BY-NC-SA
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When you short a stock, you are betting that the price of the stock is going to decrease. In this video, learn about the basics about shorting stocks. 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
Beat frequency
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David explains what beat frequency means, how to find it, and solves a sample problem involving beat frequency. Created by David SantoPietro.

Subject:
Physical Science
Physics
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
David SantoPietro
Date Added:
07/02/2021
Beginnings of Islam: The Hijra to Medina and the conversion of Mecca
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Early Muslims escape Quraysh persecution by migrating to Medina in 622. With Medina as the base of their community, they are able to convert Mecca and most of Arabia to Islam during the remainder of the life of Muhammed (next 10 years).

Subject:
History
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
07/26/2021
Beginnings of Islam: The life of Muhammad
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The early life of Muhammad including his work as a merchant, his marriage to Khadijah, his early revelations and the persecution of early Muslims by his own Quraysh tribe.

Subject:
History
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Sal Khan
Date Added:
03/15/2021