A technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter.
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1 at = 98.0665 kPa ≈ 0.96784 standard atmospheres
The symbol "at" clashes with that of the katal (symbol: "kat"), the SI unit of catalytic activity; a kilotechnical atmosphere would have the symbol "kat", indistinguishable from the symbol for the katal. It also clashes with that of the non-SI unit, the attotonne, but that unit would be more likely be rendered as the equivalent SI unit, the picogram.
| pascal | bar | technical atmosphere | standard atmosphere | torr | pound per square inch | |
|---|---|---|---|---|---|---|
| Pa | bar | at | atm | Torr | psi | |
| 1 Pa | ≡ 1 N/m2 | 10−5 | 1.0197×10−5 | 9.8692×10−6 | 7.5006×10−3 | 1.450377×10−4 |
| 1 bar | 105 | ≡ 106 dyn/cm2 | 1.0197 | 0.98692 | 750.06 | 14.50377 |
| 1 at | 0.980665 ×105 | 0.980665 | ≡ 1 kp/cm2 | 0.9678411 | 735.5592 | 14.22334 |
| 1 atm | 1.01325 ×105 | 1.01325 | 1.0332 | ≡ p0 | ≡ 760 | 14.69595 |
| 1 Torr | 133.3224 | 1.333224×10−3 | 1.359551×10−3 | 1.315789×10−3 | ≈ 1 mmHg | 1.933678×10−2 |
| 1 psi | 6.8948×103 | 6.8948×10−2 | 7.03069×10−2 | 6.8046×10−2 | 51.71493 | ≡ 1 lbF/in2 |
Famous quotes containing the words technical and/or atmosphere:
“I rather think the cinema will die. Look at the energy being exerted to revive it—yesterday it was color, today three dimensions. I don’t give it forty years more. Witness the decline of conversation. Only the Irish have remained incomparable conversationalists, maybe because technical progress has passed them by.”
—Orson Welles (1915–1984)
“We must be generously willing to leave for a time the narrow boundaries in which our individual lives are passed ... In this fresh, breezy atmosphere ... we will be surprised to find that many of our familiar old conventional truths look very queer indeed in some of the sudden side lights thrown upon them.”
—Bertha Honore Potter Palmer (1849–1918)