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pair of two hollow cups is term as​

Sagot :

Answer:

Magdeburg hemispheres are a pair of large copper hemispheres, with mating rims.

Explanation:

They were used to demonstrate the power of atmospheric pressure. When the rims were sealed with grease and the air was pumped out, the sphere contained a vacuum and could not be pulled apart by teams of horses.

Magdeburg hemispheres