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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.
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.
Download as PDF; Printable version; In other projects ... Field effect (semiconductor) Flowability; Free neutron decay; ... Mpemba effect; N. Negative refraction ...
Download QR code; In other projects ... English: Graph of freezing rates for two water samples to demonstrate the Mpemba effect.
Mpemba is an African name that may refer to Mpemba, a 13th century confederation in the Congo Basin; Mpemba Kasi, a 14th century Bantu kingdom and northernmost territory of Mpemba, which was incorporated into the founding of the Kingdom of Kongo; Erasto B. Mpemba (born 1950), Tanzanian game warden who discovered the Mpemba effect in water
Mpemba was a confederation in the western Congo Basin, at least from the 13th century. Its northernmost territory, Mpemba Kasi, was incorporated into the founding of the Kingdom of Kongo in the 14th century, and it was conquered. It neighboured the confederations of Vungu and Seven Kingdoms of Kongo dia Nlaza.
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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 ...