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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.
A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.
The 'recent view of the Mpemba effect' was put in as balance as recent papers still remain undecided over the reason for the Mpemba effect, at least there is no consensus in the recent scientific literature; the reasons still being given are in the 'Causes' section of the article.
(de Sitter effect: see) Geodetic effect (general relativity) Debye–Falkenhagen effect; Decoy effect (consumer behavior) (decision theory) (economic theories) (finance theory) (marketing) Delay (audio effect) (audio effects) (effects units) (musical techniques) Dellinger effect (radio communications) Dember effect (electrical phenomena) (physics)
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 ...
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).
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