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PIRA Code(s)
Set up time
3 minutes
Physics and Science Concepts
Fluid Mechanics, Statics of Fluids
Place the two halves together. Put the vacuum pump on the valve and evacuate the air inside. Try to separate the pieces. Vacuum pump not included; it must be obtained from demo 3B30.30.

The Magdeburg Sphere is a ball split in half with handles on either piece. When the two halves are placed together and the vacuum pump is used to evacuate the air inside, it becomes extremely difficult to separate the pieces due to external air pressure.