Definition:Standard Atmosphere
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Definition
The standard atmosphere is a unit of pressure.
It is defined as being:
Conversion Factors
| \(\ds \) | \(\) | \(\ds 1\) | standard atmosphere | |||||||||||
| \(\ds \) | \(=\) | \(\ds 101 \, 325\) | pascals | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 760\) | millimetres of mercury | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 14.70\) | pounds per square inch |
Symbol
The symbol used to denote the standard atmosphere is variously seen as follows:
The usual symbol used on $\mathsf{Pr} \infty \mathsf{fWiki}$ to denote the standard atmosphere is $\mathrm {atm}$.
A variant symbol used to denote the standard atmosphere is $\mathrm {Int \, atm}$.
This reflects its variant name of international atmosphere.
Also defined as
The standard atmosphere is also defined as:
- The amount of pressure that will support a column of mercury $760$ millimetres high at $0 \cels$ at sea level at latitude $45 \degrees$.
Also known as
The standard atmosphere is also seen in some older works as the international atmosphere.
Some sources refer to it merely as an atmosphere.
Also see
Sources
- 1969: J.C. Anderson, D.M. Hum, B.G. Neal and J.H. Whitelaw: Data and Formulae for Engineering Students (2nd ed.) ... (previous) ... (next): $2.$ Unit Conversion Factors
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): atmosphere
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): atmosphere