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PBS
Pbs Learning Media: Lever an Obelisk
Investigate the mechanical advantage of the lever in this interactive activity from the NOVA Web site.
Curated OER
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Curated OER
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Curated OER
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Curated OER
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Curated OER
Wikipedia: Lever
Wikipedia offers excellent information on levers, including a hyperlinked table of contents, images, and examples.
Duke University
Hartman Center: Emergence of Advertising in America
The Emergence of Advertising in America: 1850-1920 (EAA) presents over 9,000 images, with database information, relating to the early history of advertising in the United States.
Sophia Learning
Sophia: Simple Machines: Lesson 1
This lesson will introduce the six types of simple machines and show how machines can increase efficiency by reducing work input needed. It is 1 of 2 in the series titled "Simple Machines."
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