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17/06 /21 - Link: https://doi.org/10.32388/FO6KAP
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20/06/21 - Link: https://doi.org/10.32388/7TVP8O
Physics world: Experiments pin down conditions that make hot water freeze before cold, by Anna Demming, on Avinash Kumar & John Bechhoefer, Nature 584, 64–68 (05/08/2020)
05/08/20 - Link: https://physicsworld.com/a/experiments-pin-down-conditions-that-make-hot-water-freeze-before-cold/
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... “This work extends the Mpemba phenomenon,” says Changqing Sun, whose research at Singapore’s Nanyang Technological University focuses on properties of water that relate to the Mpemba effect. However, while Sun asserts that the work “certainly contributes to the knowledge for general situations of heat removal” he thinks further caution may be needed when applying it to water. In water, he adds, “the microscopic mechanism may differ, such as the higher thermal diffusivity and lower specific heat of water surface and the manner of hydrogen bond (O:H-O) energy exchange.”
