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Question

Vacuum above the mercury level in a barometer is called:

A
Torricelli vacuum
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B
Archimedes vacuum
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C
newtons vacuum
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D
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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