Units of measurement
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Atmosphere (atm)
Millimeters of mercury (mmHg)
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Atmosphere (atm)
Atmosphere (atm) — a unit of pressure based on the average atmospheric pressure at sea level, equal to 101,325 pascals.
Millimeters of mercury (mmHg)
Millimeters of mercury (mmHg) — a unit of pressure equal to the pressure exerted by a 1-millimeter high column of mercury. Widely used in medical practice to measure blood pressure.