Overview

Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to on the Celsius scale, on the Fahrenheit scale, and on the Rankine scale. Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in the classical sense. The object could be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because of the uncertainty principle. Cooling Cooling refers to the process of becoming cold, or lowering in temperature. This could be accomplished by removing heat from a system, or exposing the system to an environment with a lower temperature.

From Wikipedia (CC BY-SA 4.0).

Notable quotes

“A cold coming they had of it, at this time of the year; just the worst time of the year to take a journey, and specially a long journey, in.”
— Lancelot Andrewes, Sermon 15, Of the Nativity (1622).
“If I was not assured by the best authority on earth that the world is to be destroyed by fire, I should conclude that the day of destruction is at hand, but brought on by means of an agent very opposite to that of heat.”
— Charles Dodgson (bishop) quoted in Life and Letters of Lewis Carroll (1898), p. 5
“Future work will extend the coilgun method to trap molecules of chemical interest. Once they are in a magnetic trap, they can be cooled to near the single photon recoil limit using the method of single photon cooling, as demonstrated recently with trapped atoms. The application of this method to cooling of molecules is particularly promising.”
— Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen; “Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun” in Physical Review A 77(5) • (May 2008).
“It's too cold outside for angels to fly.”
— Ed Sheeran in the song The A Team (song) (2010)

Quotes via Wikiquote (CC BY-SA), each with its original source.

Notable quotes

“A cold coming they had of it, at this time of the year; just the worst time of the year to take a journey, and specially a long journey, in.”
— Lancelot Andrewes, Sermon 15, Of the Nativity (1622).
“If I was not assured by the best authority on earth that the world is to be destroyed by fire, I should conclude that the day of destruction is at hand, but brought on by means of an agent very opposite to that of heat.”
— Charles Dodgson (bishop) quoted in Life and Letters of Lewis Carroll (1898), p. 5
“Future work will extend the coilgun method to trap molecules of chemical interest. Once they are in a magnetic trap, they can be cooled to near the single photon recoil limit using the method of single photon cooling, as demonstrated recently with trapped atoms. The application of this method to cooling of molecules is particularly promising.”
— Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen; “Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun” in Physical Review A 77(5) • (May 2008).
“It's too cold outside for angels to fly.”
— Ed Sheeran in the song The A Team (song) (2010)

Quotes via Wikiquote (CC BY-SA), each with its original source.

Overview

From Wikipedia (CC BY-SA 4.0).

cold

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cold

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cold across IJR

Overview

Notable quotes

Notable quotes

Overview

cold across IJR