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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.
Mpemba effect: Hot water can, under certain conditions, freeze faster than cold water, even though it must pass the lower temperature on the way to freezing. Biology [ edit ]
(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)
US News & World Report released a list of the cities with the best quality of life for 2024 to 2025. Cities with places for outdoor activities, such as beaches and mountains, ranked higher.
The real Mpemba effect seems to be the complete abandonment of the scientific method by amateurs and scientists alike. Although there seems to be considerable anecdotal evidence for the effect there are no sources giving anything that could remotely be called a scientific description of the claimed effect.
(Reuters) - Montana legislators on Tuesday rejected an attempt to ban a transgender member of the state House of Representatives from using the women's restroom at the state Capitol, with some ...
Escape the Crate offers the experience of an escape room, but delivered to the recipient’s home. Every game is complete with a theme, story, clues, and props, and can take several hours to crack ...