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How are hourglasses measured to be exactly one hour of sand?
You Asked: How are hourglasses measured to be exactly one hour of sand? — Marko, Zagreb, Croatia Marshall Brain Answers: Before there were accurate clocks, people used hourglasses to measure the...
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How a mechanical watch works
If you have ever wondered how a mechanical watch (like a Rolex or a pocket watch) works, this video explains it brilliantly: For more info see: – How Pendulum Clocks Work – How Quartz Watches WorkFiled...
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The stuff of genius here is the reconceptualization – The Etch-a-sketch clock
When I look at this, I see the stuff of genius. The inventor has taken an etch-a-sketch (a toy for drawing) and reconceptualized it as a display with some of the same characteristics as electronic ink....
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