Vacuum above the mercury level in a barometer is called:

Torricelli vacuum

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Archimedes vacuum

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newtons vacuum

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Pascal vacuum

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Solution

The correct option is A Torricelli vacuum
A barometer was first invented by Torricelli . When an empty inverted glass tube is dipped in mercury tub, mercury rises at some height , in the tube due to atmospheric pressure . Above mercury there is a vacuum , which is called Torricelli's vacuum .

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How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?

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