## ALEX Multimedia

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Planet Gravity project
Overview:
This podcast was designed to cover the force of gravity. The purpose of this particular podcast is to compare weight on the various planets as a result of the force of gravity on a mass.

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Levitating Top Demonstration
Overview:
Gyroscopic motion, like that of a spinning top, creates a force that can be used to stabilize an object. Magnets can be used to either attract other magnets or repel them. When the forces of gyroscopic motion, magnetic repulsion, and gravity are all balanced correctly object can be made to levitate. The amazing process of levitation is displayed excellently using a Levitron top. There are no camera tricks, mirrors or wires used to make our top "float". As hundreds of our visitors can tell you this is just an amazing sight to see. Note: This video does not include audio.

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Newton's Second Law
Overview:
This podcast is part of a series of podcast designed to introduce and explain forces in our world.  This particular podcast focuses on Newton's Second Law of motion and the students use real life application and demonstration to explain this law.  They also demonstrate the math skills needed to explain what is happening in Newton's Second Law of Motion.

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Nuclear and Gravitational Force
Overview:
This podcast is one of a series of podcasts that are designed to teach about the forces in our world.  This particular podcast focuses on gravitational and nuclear forces.  The students discuss Universal Gravitation, and nuclear forces and demonstrate each in the podcast.  They also define the unit for force.

## Thinkfinity Multimedia

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Subject: Physical Education, Science
Title: Curve Balls
Description: In this Science Update, from Science NetLinks, you'll hear about the mathematics behind baseball pitching. Mathematician Chuck Romine discusses a new mathematical model that describes the trajectory of a curve ball. Science Updates are audio interviews with scientists and are accompanied by a set of questions as well as links to related Science NetLinks lessons and other related resources.