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* Normal human body temperature is 36.8 °C ±0.7 °C, or 98.2 °F ±1.3 °F. The commonly given value 98.6 °F is simply the exact conversion of the nineteenth-century German standard of 37 °C. Since it does not list an acceptable range, it could therefore be said to have excess (invalid) precision. [3]
For an exact conversion between degrees Fahrenheit and Celsius, and kelvins of a specific temperature point, the following formulas can be applied. Here, f is the value in degrees Fahrenheit, c the value in degrees Celsius, and k the value in kelvins: f °F to c °C: c = f − 32 / 1.8 c °C to f °F: f = c × 1.8 + 32; f °F to k K: k ...
British thermal unit (60 °F) BTU 60 °F: ≈ 1.054 68 × 10 3 J: British thermal unit (63 °F) BTU 63 °F: ≈ 1.0546 × 10 3 J: calorie (International Table) cal IT: ≡ 4.1868 J = 4.1868 J: calorie (mean) cal mean: 1 ⁄ 100 of the energy required to warm one gram of air-free water from 0 °C to 100 °C at a pressure of 1 atm ≈ 4.190 02 J ...
1.0 mdyn (1.6 × 10 −5 gr f) Metric gravitational units: tonne-force: t-f t f: 1.0 t f (9.8 kN; 0.98 LT f; 1.1 ST f) tf tf kilogram-force: kg-f kg f: 1.0 kg f (9.8 N; 2.2 lb f) kgf kgf gram-force: g-f g f: 1.0 g f (9.8 mN; 0.035 oz f) gf gf milligram-force: mg-f mg f: 1.0 mg f (9.8 μN; 0.015 gr f) mgf mgf Avoirdupois-based units: poundal ...
This definition also precisely related the Celsius scale to the Kelvin scale, which defines the SI base unit of thermodynamic temperature with symbol K. Absolute zero, the lowest temperature possible, is defined as being exactly 0 K and −273.15 °C. Until 19 May 2019, the temperature of the triple point of water was defined as exactly 273.16 ...
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Fahrenheit Celsius Réaumur Temperature Absolute zero: 0 K 0 °Ra −459.67 °F −273.15 °C -218.52 °Ré Freezing point of brine [a] 255.37 K 459.67 °Ra 0 °F −17.78 °C −14.224 °Ré Freezing point of water [b] 273.15 K 491.67 °Ra 32 °F 0 °C 0 °Ré Boiling point of water [c] 373.1339 K 671.64102 °Ra 211.97102 °F 99.9839 °C
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