Published by on May 27, 2021
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dewiki Mpemba-Effekt; elwiki Φαινόμενο Mpemba; enwiki Mpemba effect; eowiki Mpemba-efiko; eswiki Efecto Mpemba; etwiki Mpemba efekt; fawiki اثر امپمبا. Erasto Mpemba, a los 13 descubrió el efecto como consecuencia de una tarea, en Iringa, Tanzania, más adelante comprobó su teoría en El efecto Mpemba segun Nikola Bregovic – Download as PDF File .pdf), Text File .txt) or read online.

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This is bunk science at its finest. What were the lighting conditions too, this can have an interesting effect? If you start with a stretched rubber band in your fingers, releasing that energy by ‘flicking’ it off one your fingers, not only returns it to the loose state but it goes further and the sides close together.

There seems to be a bunch of sissy girly-men here that give one karma points without ever saying anything, I’m not one of those. Researchers of the Max-Born-Institute at Berlin, Germany, have observed how biomolecules transfer energy into extremely small water droplets in their environment.

¿Hay una explicación definitiva del efecto Mpemba? | Ciencia | Pinterest

Having now read a few posts about him, your likeminded insistance on writing drivle makes a lot more sense. There’s a number of possible explanations out there. It takes more time to release more energy. After initial consternation, Osborne experimented on the issue back at his workplace and confirmed Mpemba’s finding. Now, the team in Singapore appears to have solved the riddle—it’s due, efeco claim, to the small amount of energy stored in stretched hydrogen bonds.

NO, convection is not jpemba itself a sufficient answer, though it has reputably been put forth as a factor. That is really a nonsensical statement.

Water found to be an ideal lubricant for nanomachines. For example, it could be used to make electronic devices which we want to cool faster. Joseph Black then discussed Fahrenheit’s description of supercooling of water although the term supercooling had not then been coinedarguing, in modern terms, that the previously-boiled water could not be as readily supercooled. We only “know” it because people keep insisting it does.


At this point, the claims by the research team are still theory—they or others will still need to find a way to prove what they’ve suggested As everyone knows, water molecules have one oxygen atom and two hydrogen atoms—all held together by covalent bonds the sharing of electrons.

What method is used to assess water temperature such as without causing disturbance – etc? Perhaps water that was once boiled has less dissolved oxygen and gasses in it and freezes at a different rate.

Researchers claim to have discovered why warm water freezes faster than cooler water

The Mpemba mpembba is a process in which hot water can freeze faster than cold water. Thus formerly warm water has some stronger convection going on compared to cold water even when the formerly warm water is at or below the same temperature as the cold. Wikimedia Commons has media related to Mpemba effect. Various effects of heat on the freezing of water were described by ancient scientists such as Aristotle: Seems to be a few people disputing the claim in the comments here, and I’m certainly somewhat of a layman on this subject, but for me the most useful description of the effect came from the abstract.

Julian—Gregorian uncertainty Wikipedia semi-protected pages Commons category link is on Wikidata Use dmy dates from September By contrast, cooling takes minutes or hours. There were preceding ancient accounts of similar phenomena, but lacking sufficient detail to attempt verification. He described it in in Form 3 of Magamba Secondary School, Tanganyikawhen freezing ice cream mix that was hot in cookery classes and noticing that it froze before the cold mix. Early modern scientists such as Francis Bacon noted that, mpekba tepid water freezes more easily than that which is utterly cold.


I have observed that warm water freezes faster than cold. To me, the great thing about this website, is it provides a gateway for laymen like myself to learn about leading edge scientific research without having to subscribe to however many scientific journals.

For example, if the hotter temperature melts the frost on a cooling surface and thus increases the thermal conductivity between the cooling surface and the water container. Humans can get by in the most basic of shelters, can scratch together a meal from the most humble of ingredients. No ‘mystery’ to me. Considerable random variation was observed in the time required for spontaneous freezing to start and in some cases this resulted in the water which started off hotter partially freezing first.

Binodal Compressed fluid Cooling curve Equation of state Leidenfrost effect Macroscopic quantum phenomena Mpemba effect Order and disorder physics Spinodal Superconductivity Superheated vapor Superheating Thermo-dielectric effect.

A smaller amount of water has a higher surface to volume ratio i. Clearly the experimental method is the key issue. How is what you said useful to anybody?

So by the time it has cooled to the temperature of a same amount that started of cooler there’s slightly less of it in the cup.

Go back to You Tube.

Mpemba effect

What’s also known is that with water molecules, hydrogen atoms are also attracted to the oxygen atoms in other nearby water molecules—a force called a hydrogen bond. That is why, the researchers say, it freezes faster than cool water. If I am understanding you Teech you are saying that cold water has to give up more energy to freeze than warm water.