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I spent a bit of time looking, you tend to come across the same video clip a lot...
L
L
Jan 4, 2010. 1:13 PMRe-design
says:
Set up your tank. THe bottom is open and the top is closed. Put a tube up to the top of the tower and suck out the air with a shop vac. and water will fill the tower and stay there.
My first thought was "not very well" but then I went and found out what an open bottomed fish-tank is.
It works by the air pressure on the surface of the lower open tank preventing the water running out of the raised tank. Atmospheric pressure will support a column of water up to around 32 feet. As Steve says, try it on a small scale with a glass.
It works by the air pressure on the surface of the lower open tank preventing the water running out of the raised tank. Atmospheric pressure will support a column of water up to around 32 feet. As Steve says, try it on a small scale with a glass.
Just with atmospheric pressure. Try it in your bathroom sink. Fill the sink, fill a glass with water, invert it under the water and then lift the glass ALMOST out of the water.
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