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Product Information Demonstrate that air has weight. This easy-to-use apparatus illustrates a concept that is often difficult for students to fully grasp. Simply weigh the can when full of air with the valve open. Then pump the air out with a vacuum pump, close the valve, and weigh the can again. Your students will immediate see that the can has “lost” about half a gram of weight. Can is seamless and made of aluminum.  Tell a Friend about this item
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