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Which instrument is used to measure Earth's air pressure ?
A
Barometer
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B
Thermometer
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C
Micrometer
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D
Gaugemeter
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Solution
The correct option is A Barometer <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
An instrument that helps to measure Earth’s air pressure is the barometer. It is an inverted glass tube immersed in mercury.