Torr: Difference between revisions
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'''Torr''', a unit of [[pressure]]. One |
'''Torr''', a unit of [[pressure]]. One torr was originally defined as the pressure exerted by a [[millimeter]] depth of [[mercury (element)|mercury]], then as 1/760 of a [[standard atmosphere]]. |
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Because the standard atmosphere is now a defined quantity in the [[SI]] system of units, the torr is hence defined as exactly 101325 / 760 [[ |
Because the standard atmosphere is now a defined quantity in the [[SI]] system of units, the torr is hence defined as exactly 101325 / 760 [[pascal]]s. Although the torr is still in common use in low-pressure engineering, the pascal is now the recommended unit of pressure. |
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The |
The torr unit is named after [[Evangelista Torricelli]]. |
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See also: |
See also: |
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Revision as of 12:35, 14 April 2003
Torr, a unit of pressure. One torr was originally defined as the pressure exerted by a millimeter depth of mercury, then as 1/760 of a standard atmosphere.
Because the standard atmosphere is now a defined quantity in the SI system of units, the torr is hence defined as exactly 101325 / 760 pascals. Although the torr is still in common use in low-pressure engineering, the pascal is now the recommended unit of pressure.
The torr unit is named after Evangelista Torricelli.
See also: