atm
(atmosphere)
(unit of pressure)
An atm (or atmosphere) is a unit of pressure conceived to
represent Earth atmospheric pressure.
It has been standardized with an exact value,
a nominal value of the average air pressure
at sea level at the latitude of Paris, France.
Equivalences:
- 101325 pascals
- 1013.25 millibars
- 1.01325 bar
- 760 torr
- ≈14.7 pounds-force per square inch.
Other units of pressure:
- a pascal (Pa), an SI-derived unit consisting of 1 kg·m-1·s-2.
- a bar, 10,000 pascals, convenient for (also) being roughly Earth atmospheric pressure.
- a millibar (mbar, 1/1000 of a bar).
- a megabar (Mbar, a million bars).
- a torr (nominal value for the pressure difference of 1 millimeter of mercury in a mercury barometer).
(physics,unit,pressure,Earth)
Further reading:
https://en.wikipedia.org/wiki/Atmosphere_(unit)
https://en.wikipedia.org/wiki/Bar_(unit)
https://glossary.ametsoc.org/wiki/Standard_atmosphere
https://glossary.ametsoc.org/wiki/Bar
http://www.ilpi.com/msds/ref/pressureunits.html
https://www.convertworld.com/en/pressure/physical-atmosphere.html
https://www.nist.gov/pml/sensor-science/thermodynamic-metrology/unit-conversions
https://www.nist.gov/system/files/documents/calibrations/pmc-2.pdf
Referenced by pages:
admittance
bar
metal
metallic hydrogen
surface gravity (g)
Titan
torr
Venus
water vapor planet
Index