The empty space above mercury in a simple barometer is called _______vaccum

pressure

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barometric

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torricellian

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mercuric

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Solution

The correct option is C torricellian
Torricellian vacuum
The vacuum formed when a long tube, closed at one end and filled with mercury, is inverted into a mercury reservoir so that the open end of the tube is below the surface of the mercury. The pressure inside the Torricellian vacuum is the vapour pressure of mercury, about $103 t o r r .$

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