Uncle Roger's Notebooks of Daily Life |
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Wednesday, June 29, 2005 If you want to empty a small-mouthed bottle of water (or other non-carbonated liquid) quickly, turn it upside down and move it in a circular motion to set up a whirlpool in the liquid going out. This allows the air to flow inward, up the middle at the same time as the water spirals down the outside. For those interested, this is what happens with tornadoes. A layer of heavier, cold air sits atop a layer of lighter, warmer air and manages to punch a hole towards the ground. The cold air pours down as the warm air moves up. Check out the Wikipedia for a more detailed (and more accurate) explanation. |
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