What causes a vacuum?
 Fred |
 Lilly |
„
Now I realize that the vacuum doens´t suck on the lid.
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„
Yes, it only seems that way to us as if the vacuum on the inside of the jar sucks on the lid.In reality it is being pressed to the jar because of external air pressure.
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„
You´re right. Do you also think that we´ve come a lot closer to the solution of this riddle?
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