[[Walter-Levin.png|200px|left]]This is a college lecture by Prof Walter Levin explaining gravitation. Click [http://upload.wikimedia.org/wikipedia/commons/9/91/Newtonslawofgravity.ogg here] to see the video.
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[[Image:Walter-Levin.png|200px|left]]This is a college lecture by Prof Walter Levin explaining gravitation. Click [http://upload.wikimedia.org/wikipedia/commons/9/91/Newtonslawofgravity.ogg here] to see the video.