Posted: Saturday, January 26, 2013 12:00 am
Life under pressure
By Rod Suess/Vinewood Community Church
Lodinews.com
|
The two-gallon tin can lay in a crumpled heap on the counter at the front of the classroom. Mr. Johnson had just demonstrated the amazing reality of atmospheric pressure.
Sealing the can except for one small tube attached to an air pump, he explained that when he flipped the switch, air would gradually be sucked out of the can. At some point, the pressure of the air outside the can would become greater than the air pressure inside the can, and something would happen.
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