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Gravitational and kinetic energy at work

 
Jennifer Wadsworth
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Location: Phoenix, AZ (9b)
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posted 11 years ago
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Subtropical desert (Köppen: BWh)
Elevation: 1090 ft Annual rainfall: 7"

 
John Elliott
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Yes, Walter Lewin is still alive, although his hair is greyer now.
 
Did you ever grow anything in the garden of your mind? - Fred Rogers. Tiny ad:
Willow Feeder Bundle: Movie, eBook and Plans
https://permies.com/wiki/359686/Willow-Feeder-Bundle-Movie-eBook
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