Question

Air pressure is expressed in _____.​

Answer 1

Answer:

Hello mate..

Here Is Your Answer:

Air pressure is expressed in several different systems of units: millimetres (or inches) of mercury, pounds per square inch (psi), dynes per square centimetre, millibars (mb), standard atmospheres, or kilopascals.

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Answer 2

Answer:

milimeter is correct answers of this question