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watts matter


Created by Emma MD, last updated 2017-01-12


Wind Works!

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Let It Roll

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Bottle "Tops"

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Catapult

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Rollin’ Rollin' Rollin'

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Bearings for Your Whirligig

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Springs and Stomachs

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Inertia Coin Stack Challenge

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Going for a Spin

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As the Rotor Turns

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How Do Things Fall?

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