The SI unit is the pascal, equal to one newton per square meter.
A bar is exactly 100,000 pascal.
An atmosphere is approximately equal to a bar.
Torr means more or less the same as mmHg, and refers to the pressure caused by a liquid column of Mercury (Hg).
hectopascal (hPa) for atmospheric air pressure is preferred
kilopascals (kPa) is for similar pressures
i dont know the third one, sorry
Barometric is one
millibars, inches and atmosphere.
There are far more than three units used to describe pressure.Three popular ones are:pounds per square inchpascalatmosphereTorrmillibar
Pressure, volume and temperature, and moles of gas are the four principal variables to describe a gas (for example, see related questions on Ideal Gas Law and others). The standard units are: Pressure: atmospheres (atm) Volume: liters (L) Temperature: Kelvin (K) Number of moles are measure in, well, moles.
Same units as are used to describe the surface gravity of the Earth, the moon, or any other body: Units of acceleration, such as meter/sec2 or feet/sec2 .
packets
kilo
There are far more than three units used to describe pressure.Three popular ones are:pounds per square inchpascalatmosphereTorrmillibar
there is only one
three....length, mass, and time
The unit of measure used to describe electrical "pressure" is the "Volt."
Probably a mercury barometer and a aneroid barometer. -adrian
Watts
Pressure, volume and temperature, and moles of gas are the four principal variables to describe a gas (for example, see related questions on Ideal Gas Law and others). The standard units are: Pressure: atmospheres (atm) Volume: liters (L) Temperature: Kelvin (K) Number of moles are measure in, well, moles.
Same units as are used to describe the surface gravity of the Earth, the moon, or any other body: Units of acceleration, such as meter/sec2 or feet/sec2 .
The two most common units used for air pressure in weather reports are: Inches of Mercury and Millibars.
speed and direction
Liter
No units - its a ratio.