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How Many Regular Hexagons?

How many regular hexagons can you count in this image?

Correct answers: 142

The first user who solved this task is Djordje Timotijevic.

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10 years ago we had Johnny Cas...

10 years ago we had Johnny Cash, Bob Hope, and Steve Jobs. Now we have no cash, no hope, and no jobs.

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Electric motor

In 1904, the first direct current, interpole, electric motor to be patented in the U.S. was issued to Mathias Pfatischer of Phildadelphia, Pennsylvania under the title "Variable Speed Motor" (No.775,310). His improvement was to "effect commutation without sparking, with a variable load as well as at variable speed and which is capable of rotation in either direction." The new design added auxiliary-field pole-pieces which were small as compared to the main pole-pieces.«

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