Did you know?
oto von Guericke, a German scientist of the 17 century, invented a pump to
extract air out of a vessel With the help of this pump. he demonstrated
dramatically the force of the air pressure. He joined two hollow metalle
bers of 51 cm diameter each and pumped out of them. Then he
employed the horses on each bem bere to pull them apart11.2015
peat is the one of dr pressure that the beers could not be pulled apart
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