Pythagorean Cup and self starting siphons

• C+25+60

As the cup is filled it begins to fill the internal tube. When the water level is above the peak, the siphoning actions begins. This is the same principle that operates a toilet flush.

Related Demos

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C+25+0 Flettner rotorcar blown with fan. C+25+2 Smoke Ring Generator C+25+4 Airzooka C+25+5 Bernoulli's principle: Ball suspended in air stream. C+25+10 Glass standpipes: Water flows through tube, heights vary. C+25+11 Glass standpipes with a constriction. Similar to C+25+10. C+25+15 Glass aspirator: Compressed air draws colored water up glass tube. C+25+16 Compressed air through funnel sucks in ball. C+25+17 Compressed air attracts card with pin to holder. C+25+20 Venturi meter: Manometer tubes on tapered wind tunnel tube. C+25+25 Pitot tube inserted in wind stream with manometer indicator. C+25+30 Two roof models, hinged, placed in wind stream. C+25+35 Video camera shows fluid flow around various objects. C+25+40 Water in vertical standpipe with holes at different heights. C+25+42 Marriote’s Bottle. Vertical standpipe with constant water pressure C+25+45 Hydraulic ram water pump, working model. C+25+50 A water vortex in two soda bottles joined vertically. C+25+55 A vortex tube seperates compressed air into jets of hot and cold air. C+25+60 Applet: Fluid Pressure and Flow C+25+65 Applet: Vector Fields C+25+70 Applet: Faraday's Law C+25+75 Extreme Spin on Launched Ball C+25+80 Faucet for demonstration C+25+82 Large sphere surrounded by small spheres rises to surface C+25+85 Siphon from one beaker to another C+25+90 Bernoulli effect: objects drawn together