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Torr, unit of measure |
| The torr (symbol: Torr) or millimeter of mercury (mmHg) is a non-SI unit of pressure. It is the atmospheric pressure that supports a column of mercury 1 millimeter high. The unit is named after Evangelista Torricelli, Italian physicist and mathematician, for his discovery of the principle of the barometer in 1643. A related unit is the micrometre of mercury (µmHg), which is one thousand times smaller. |
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pascal, exapascal, petapascal, terapascal, gigapascal, megapascal, kilopascal, hectopascal, dekapascal, decipascal, centipascal, millipascal, micropascal, nanopascal, picopascal, femtopascal, attopascal, newton/square meter, newton/square centimeter, newton/square millimeter, kilonewton/square meter, bar, millibar, microbar, dyne/square centimeter, kilogram-force/square meter, kilogram-force/square centimeter, kilogram-force/square millimeter, gram-force/square centimeter, ton-force (short)/square foot, ton-force (short)/square inch, ton-force (long)/square foot, ton-force (long)/square inch, kip-force/square inch, ksi, pound-force/square foot, pound-force/square inch, psi, poundal/square foot, centimeter mercury (0°C), millimeter mercury (0°C), inch mercury (32°F), inch mercury (60°F), centimeter water (4°C), millimeter water (4°C), inch water (4°C), foot water (4°C), inch water (60°F), foot water (60°F), atmosphere technical, Standard atmosphere
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