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Cosa (chi) è red heat - definizione
red heat
![The peak wavelength and total radiated amount vary with temperature according to [[Wien's displacement law]]. Although this shows relatively high temperatures, the same relationships hold true for any temperature down to absolute zero. Visible light is between 380 and 750 nm.](https://commons.wikimedia.org/wiki/Special:FilePath/Wiens law.svg?width=200 "The peak wavelength and total radiated amount vary with temperature according to [[Wien's displacement law]]. Although this shows relatively high temperatures, the same relationships hold true for any temperature down to absolute zero. Visible light is between 380 and 750 nm.")
WIKIMEDIA DISAMBIGUATION PAGE
Wikipedia talk:Articles for creation/Red Heat (disambiguation); Red Heat; Red Heat (disambiguation); Red Heat (film)
¦ noun the temperature or state of something so hot that it emits red light.
Red heat
WIKIMEDIA DISAMBIGUATION PAGE
Wikipedia talk:Articles for creation/Red Heat (disambiguation); Red Heat; Red Heat (disambiguation); Red Heat (film)
The practice of using colours to determine the temperature of a piece of (usually) ferrous metal comes from blacksmithing. Long before thermometers were widely available it was necessary to know what state the metal was in for heat treating it and the only way to do this was to heat it up to a colour which was known to be best for the work.
Heat
ENERGY THAT IS TRANSFERRED FROM ONE BODY TO ANOTHER AS THE RESULT OF A DIFFERENCE IN TEMPERATURE
Heating; Heat change; Heat energy; Heat (thermodynamics); Sources of heat; Thermal enegy; Heat as energy; Heat source
·noun Sexual excitement in animals.
II. Heat ·noun Fermentation.
III. Heat ·noun Animation, as in discourse; ardor; fervency.
IV. Heat ·noun Agitation of mind; inflammation or excitement; exasperation.
V. Heat ·Impf & ·p.p. Heated; as, the iron though heat red-hot.
VI. Heat ·vt To excite or make hot by action or emotion; to make feverish.
VII. Heat ·noun Utmost violence; rage; vehemence; as, the heat of battle or party.
VIII. Heat ·vt To excite ardor in; to rouse to action; to excite to excess; to inflame, as the passions.
IX. Heat ·vt To make hot; to communicate heat to, or cause to grow warm; as, to heat an oven or furnace, an iron, or the like.
X. Heat ·noun A single complete operation of heating, as at a forge or in a furnace; as, to make a horseshoe in a certain number of heats.
XI. Heat ·vi To grow warm or hot by the action of fire or friction, ·etc., or the communication of heat; as, the iron or the water heats slowly.
XII. Heat ·vi To grow warm or hot by fermentation, or the development of heat by chemical action; as, green hay heats in a mow, and manure in the dunghill.
XIII. Heat ·noun A violent action unintermitted; a single effort; a single course in a race that consists of two or more courses; as, he won two heats out of three.
XIV. Heat ·noun High temperature, as distinguished from low temperature, or cold; as, the heat of summer and the cold of winter; heat of the skin or body in fever, ·etc.
XV. Heat ·noun The sensation caused by the force or influence of heat when excessive, or above that which is normal to the human body; the bodily feeling experienced on exposure to fire, the sun's rays, ·etc.; the reverse of cold.
XVI. Heat ·noun Indication of high temperature; appearance, condition, or color of a body, as indicating its temperature; redness; high color; flush; degree of temperature to which something is heated, as indicated by appearance, condition, or otherwise.
XVII. Heat ·noun A force in nature which is recognized in various effects, but especially in the phenomena of fusion and evaporation, and which, as manifested in fire, the sun's rays, mechanical action, chemical combination, ·etc., becomes directly known to us through the sense of feeling. In its nature heat is a mode if motion, being in general a form of molecular disturbance or vibration. It was formerly supposed to be a subtile, imponderable fluid, to which was given the name caloric.
Wikipedia
Red heat
The practice of using colours to determine the temperature of a piece of (usually) ferrous metal comes from blacksmithing. Long before thermometers were widely available it was necessary to know what state the metal was in for heat treating it and the only way to do this was to heat it up to a colour which was known to be best for the work.
