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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/

Rate this solar yacht from 1-10 ⚓🌞 and tell us your ideal destination for silent sailing! Silent Yachts S64 © Silent-Yachts Length: 64 ft (19.5 m) Beam: 29 ft 6 in (9 m) Draft: 3 ft 6 in (1.1 m) Displacement: approx. 77,000 lb (35,000 kg) Top Speed: 20 knots or 23 mph (37 km/h) Cruising Speed: 6–8 knots or 7–9 mph (11–15 km/h) Range: Unlimited on solar at 6 knots Price: approx. US$ 3.9 Million The Silent S64 brings next-level efficiency to bluewater cruising with solar panels, battery banks, and twin electric motors delivering completely silent propulsion. No noise, no fumes, and minimal maintenance make it ideal for long, off-grid voyages. It features panoramic salon windows, a spacious flybridge, and up to five cabins with luxurious finishes. The S64 offers true independence—capable of crossing oceans using only solar power. Current pricing starts around US$ 3.9 Million. #SilentYachtsS64 #ElectricCatamaran #SolarPoweredYacht #Shorts