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This is a collection of temperature conversion formulas and comparisons among eight different temperature scales, several of which have long been obsolete.. Temperatures on scales that either do not share a numeric zero or are nonlinearly related cannot correctly be mathematically equated (related using the symbol =), and thus temperatures on different scales are more correctly described as ...
At standard mean sea level it specifies a temperature of 15 °C (59 °F), pressure of 101,325 pascals (14.6959 psi) (1 atm), and a density of 1.2250 kilograms per cubic meter (0.07647 lb/cu ft). It also specifies a temperature lapse rate of −6.5 °C (−11.7 °F) per km (approximately −2 °C (−3.6 °F) per 1,000 ft).
1481 m/s at 20 °C 1507 m/s at 30 °C 1526 m/s at 40 °C 1541 m/s at 50 °C 1552 m/s at 60 °C 1555 m/s at 70 °C 1555 m/s at 80 °C 1550 m/s at 90 °C 1543 m/s at 100 °C Density [9] [2] [page needed] 0.983854 g/cm 3 at −30 °C 0.99221 g/cm 3 at 40 °C 0.993547 g/cm 3 at −20 °C 0.99022 g/cm 3 at 45 °C
"The output of the heat exchanger experiences an increase of 72 °F" or "Our standard uncertainty is ±5 °F". However, some authors instead use the notation "An increase of 50 F°" (reversing the symbol order) to indicate temperature differences. Similar conventions exist for the Celsius scale, see Celsius § Temperatures and intervals. [9] [10]
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The vapor pressure of water is the pressure exerted by molecules of water vapor in gaseous form (whether pure or in a mixture with other gases such as air). The saturation vapor pressure is the pressure at which water vapor is in thermodynamic equilibrium with its condensed state.