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May 12, 2019

A flat surface, moving in water, creates resistance.   Water resists displacement and penetration by speeding flat objects.  Resistance blocks speeding objects on the surface and below.  On top of water, blocking is also known as lift.  Beneath the surface blocking is...

May 4, 2019

Mark Twain described a lightning fast surfer:  "at the right moment he would fling his board upon its foamy crest and himself upon the board, and here he would come whizzing by like a bombshell! It did not seem that a lightning express-train could shoot along at a more...

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July 6, 2019

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