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description: Physical dynamics (2 VIDEOS)
- Barycentric balls - classroom demonstration video, VP07a
- Released: 30/04/2015
- Length: 00:03:18
- Clips: 0
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- Barycentric balls in space - classroom demonstration video, VP07b
- Released: 30/04/2015
- Length: 00:09:19
- Clips: 0
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