Convert attopascal to millimeter water (4°C)
Please provide values below to convert attopascal [aPa] to millimeter water (4°C) [mmH2O], or Convert millimeter water (4°C) to attopascal.
How to Convert Attopascal to Millimeter Water (4°c)
1 aPa = 1.01974428892211e-19 mmH2O
Example: convert 15 aPa to mmH2O:
15 aPa = 15 × 1.01974428892211e-19 mmH2O = 1.52961643338316e-18 mmH2O
Attopascal to Millimeter Water (4°c) Conversion Table
| attopascal | millimeter water (4°C) |
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Attopascal
The attopascal (aPa) is a unit of pressure equal to 10^-18 pascals, representing an extremely small pressure measurement.
History/Origin
The attopascal was introduced as part of the SI prefixes to denote very small quantities of pressure, but it is rarely used in practical applications due to its minuscule magnitude.
Current Use
The attopascal is primarily used in scientific research and theoretical contexts where extremely small pressure differences are relevant, although it remains largely a conceptual unit.
Millimeter Water (4°c)
Millimeter water (4°C) is a unit of pressure measuring the height of a water column at 4 degrees Celsius that exerts a specific pressure.
History/Origin
The unit originated from the use of water columns to measure pressure, particularly in hydrology and medical applications, with standardization based on the density of water at 4°C.
Current Use
It is primarily used in medical and scientific contexts to measure low pressures, such as intracranial pressure, respiratory pressures, and in calibration of pressure sensors.