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Unformatted text preview: tape, so that they stay together and theyre straight. 5. Now, wrap them with a long length of duct tape. The more neatly you wrap, the better it will work. 6. Turn your tornado twister upside down, and give it a swirl. Try it again, without giving it a twist. Discussion: Gravity pulls the water down into the empty bottle. But the empty one is not really empty. It is full of air. When the water swirls through the necks of the bottles, an open space forms in the middle, it is a whirlpool. The air in the lower bottle can flow up through the open center of the whirlpool into the upper bottle. The spinning water holds a steady shape. Without the whirlpool to let the air go by, the water burbles its way through. The flow is not smooth and its often much slower than the whirlpools flow. Source: This lab is a modified version of a similar activity from NyeLabs.com...
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- Spring '08