Air Pressure Experiment
Posted On: 2009-01-05

You need two drinking straws and a small bottle filled with water. Have a boy put both straws in his mouth, with the end of one straw in the water and the other outside the bottle. Now ask him to suck water out of the bottle. He can't - because the air pressure in his mouth is equalized by the air coming in through the outside straw.


 

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