Question

vacuum above the mercury level in a barometer is called

Answer 1

Barometer is used to determine the local atmospheric pressure. Mercury is employed in the barometer because its density is sufficiently high for a relative short column to be obtained. ... This almost vacuum condition above the mercury in the barometer is known asTorricellian vacuum.

Answer 2

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Here is ur answer

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The vacuum above the mercury level in a barometer is called Torricellian vacuum.

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