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In the imperial measurement systems, "pitch" is usually expressed with the rise first and run second (in the US, run is held to number 12; [1] e.g., 3:12, 4:12, 5:12). In metric systems either the angle in degrees or rise per unit of run, expressed as a '1 in _' slope (where a '1 in 1' equals 45°) is used.
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
8.33%(1 in 12) – Nilgiri Mountain Railway Tamil Nadu, India; 8.0% (1 in 12.5) – Just outside the Tombstone Jct. Station in the Tombstone Junction Theme Park, Kentucky, US. The railroad line there had a ruling grade of 6% (1 in 16.7). 7.85% (1 in 12.7) – Near Washington Street station on the Green Line B branch, Boston, Massachusetts, US. [20]
The Rankine scale is used in engineering systems where heat computations are done using degrees Fahrenheit. [3] The symbol for degrees Rankine is °R [2] (or °Ra if necessary to distinguish it from the Rømer and Réaumur scales). By analogy with the SI unit kelvin, some authors term the unit Rankine, omitting the degree symbol. [4] [5]
Unlike the degree Fahrenheit and degree Celsius, the kelvin is no longer referred to or written as a degree (but was before 1967 [1] [2] [3]). The kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the degree Celsius, which has the same magnitude. Other scales of temperature:
Boston dipped to 10 degrees below zero Fahrenheit on Saturday morning with an AccuW ... This is the coldest air the city has experienced since the thermometer dipped to 12 degrees below zero on ...
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 ...
0.5–1.2 TK, Fermi melting point of hadrons into quark–gluon plasma; 3–5 TK in proton–antiproton reactions; 3.6 TK, temperature at which matter doubles in mass (compared to its mass at 0 K) due to relativistic effects; 5.5 TK, highest man-made temperature in thermal equilibrium as of 2015 (quark–gluon plasma from LHC collisions) [18]