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March 14th...giornata della matematica, Pi Greco day. Perchè non utilizzare le cifre di π per costruire una spirale, la spirale di Archimede, da appendere in classe o nel corridoio? Se appesa sopra un termosifone o un'altra fonte di calore, diventa una divertente attività ed esperimento con cui scoprire alcune caratteristiche dell'aria: la spirale ruota e si muove perchè spostata dall'aria calda. L’aria calda è più leggera dell’aria fredda perché meno densa e sale verso l’alto. https://maestramonica.it/pi-greco-day-la-spirale-di-archimede-matematica/
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http://www.boattest.com More test data and High Quality videos available at www.boattest.com
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In this video we show you how the Farrier F-9AR trimaran Redshift can sail at 1.5x wind speed - 17.8 knots in about 11 knots of breeze!!! Disclaimer: - This content is offered solely for your education and entertainment. - There are no warranties, expressed or implicit, about any content or its fitness for a particular purpose. - There are risks of injury, death, drunkenness, and financial hardship involved in sailing. - The skipper is always responsible for the safety of their vessel and crew. - Sailing Tips is not responsible or liable in any way for anything that happens on or anywhere near your boat or any boat that we are not in command of. #howto #farrier #corsair #trimaran #sailing #howtosail #learntosail #sailingtips
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