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Expressing Spherical Unit Vectors in Cartesian Form

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...
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Part 2: Time Derivatives of Unit Vectors in Spherical Coordinates

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...
ZDNet

3D printing hands on: Understanding the difference between Delta and Cartesian printers

Fused deposition modeling printing is the most common printing method used in 3D printing. The two key words are "deposition" and "fused". Basically, what an FDM 3D printer does is heat up plastic, ...