====== Mpemba effect ======

>Under certain conditions, it takes a shorter time to cool a hot system than to cool the same system initiated at a lower temperature. This phenomenon - the “Mpemba effect” - was first observed in water and has recently been reported in other systems. __Whereas several detail-dependent explanations were suggested for some of these observations, no common underlying mechanism is known."__\\ \\ Source : [[https://royalsocietypublishing.org/doi/10.1098/rsta.2020.0066|Nonequilibrium thermodynamics of the Markovian Mpemba effect and its inverse]]// PNAS//, vol. 114 no. 20, pp 5083–5088, May 2107

There are [[https://en.wikipedia.org/wiki/Mpemba_effect#Suggested_explanations|various theories]] regarding an explanation of the effect, though none is yet universally accepted.

In addition, there is still some //debate around whether the effect actually exists//, or is simply due to measurement anomalies.

Further info [[https://en.wikipedia.org/wiki/Mpemba_effect|Wikipedia]]