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Erasto Bartholomeo Mpemba [1] (1950–2023) [note 1] was a Tanzanian game warden who, as a schoolboy, discovered the eponymously named Mpemba effect, a paradoxical phenomenon in which hot water freezes faster than cold water under certain conditions; this effect had been observed previously by Aristotle, Francis Bacon, and René Descartes.
The Mpemba effect is the name given to the observation that a liquid (typically water) that is initially hot can freeze faster than the same liquid which begins cold, under otherwise similar conditions. There is disagreement about its theoretical basis and the parameters required to produce the effect.
Gibbs–Donnan effect (biology) (physics) Gibbs–Thomson effect (petrology) (thermodynamics) Glass house effect (culture) (surveillance) Glasser effect (physics) Goos–Hänchen effect (optical phenomena) Great Salt Lake effect (natural history of Utah) Green-beard effect (evolution) (evolutionary biology) (game theory) (selection)
David Auerbach, Supercooling and the Mpemba effect: when hot water freezes quicker than cold, American Journal of Physics, 63(10), 1995. Words like superficial and looks do not indicate hard core physics, and this comes from the source supposedly proving Mpemba? Wrong, try again. Hard Raspy Sci 09:54, 5 November 2005 (UTC)
Homochirality is an obvious characteristic of life on Earth, yet extraterrestrial samples contain largely racemic compounds. [7] It is not known whether homochirality existed before life, whether the building blocks of life must have this particular chirality, or whether life must be homochiral at all. [8] [9] What do all the unknown proteins do?
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The Kalûnga Line in Kongo religion is a watery boundary between the land of the living (Ku Nseke) and the spiritual realm of the ancestors (Ku Mpemba). Kalûnga is the Kikongo word "threshold between worlds." It is the point between the physical world (Ku Nseke) and the spiritual world (Ku Mpemba).
The Mpemba Effect relates to hot water freezing faster than cold water in certain circumstances, none of which is identified as having been thrown up in the air. Also, while the Mpemba Effect is not well understood, the trick of throwing hot water into very cold air so that it quickly vaporizes and then condenses into small droplets and freezes ...