Here Reekos demonstrates a scienctific experiment that's sure to amaze! While sucking on the straw, the air pressure in your mouth is less than the air pressure outside of the straw (in the room, in the glass, etc.). The outside air pressure is pushing down on the water which forces the water up the straw.
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www.spartechsoftware.com/reeko/Experiments/SuckingThruS...
www.spartechsoftware.com/reeko/Experiments/SuckingThruStraw.htm
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The air outside in jar #1 is at a greater pressure than the air inside, thus forcing the water up the straw and making a fountain. Activity #2: The Magic Glass; Materials: Jar, 4"x6" index card, water;
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www.iit.edu/~smile/ph9603.html
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DRINKING STRAW: A drinking straw is used by creating a suction with your mouth. Actually this causes a decrease in air pressure on the inside of the straw. Since the atmospheric pressure is greater on the outside of the straw, liquid is forced into and up the straw.
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www.elmhurst.edu/~chm/vchembook/180pressure.html
www.elmhurst.edu/~chm/vchembook/180pressure.html
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When you drink from a straw, you lower the air pressure inside the straw and so the Thus, air pressure is lowered in the flask (and in the straw) and no...
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pzweb.harvard.edu/ucp/curriculum/pressure/s3_lesson7_ba...
pzweb.harvard.edu/ucp/curriculum/pressure/s3_lesson7_background.htm
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The objective of the project was to evaluate the negative air pressure cover technology on straw stacks. Sub-objectives were: The negative air pressure cover system has the potential to provide excellent protection to straw and forage stacks. The cover will be of special interest to producers that have markets that...
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www.gov.mb.ca/agriculture/research/ardi/projects/99-288...
www.gov.mb.ca/agriculture/research/ardi/projects/99-288.html
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Aug 2, 2006 Air pressure pushes down and up the straw through both openings, But if you block off the top of the straw, then air pressure can only...
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van.physics.illinois.edu/qa/listing.php?id=2260
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[Archive] air pressure: water through a straw Classical Physics.
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www.physicsforums.com/archive/index.php/t-59502.html
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The Big Bang Theory More on the Big Bang Book Review - Many Worlds in One...
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physics.about.com/cs/opticsexperiments/a/290903.htm
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In this humorous experiment we demonstrate air pressure. Guaranteed to put a smile on your face! When you stop sucking on the straw and remove the straw from your mouth the air rushes back into the bottle, increasing the pressure and causing the marshmallow to return to its original size.
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www.spartechsoftware.com/reeko/Experiments/ExpMarshmall...
www.spartechsoftware.com/reeko/Experiments/ExpMarshmallowPressure.htm
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