Skip to comments.RSC offers £1000 for explanation of an unsolved legendary phenomenon
Posted on 06/27/2012 12:41:32 AM PDT by neverdem
It seems a simple enough question - yet it has baffled the best brains for at least 2,300 years.
Now the Royal Society of Chemistry is offering £1000 to the person or team producing the best and most creative explanation of the phenomenon, known today as The Mpemba Effect.
Competition judges will be looking for an outside-the-box, inventive submission. In addition, the format of the submission should be creative and eye-catching.
Any medium or technology can be employed to make the case, including articles, illustrations or even film.
Submissions can be based on, and reference, existing research. The winning submission will be scientifically sound, and arresting in presentation and delivery.
The public has four weeks to crack the case before a group of the world's brightest young science brains take on the challenge in London as one aspect of a special science communications meeting entitled Hermes 2012.
Fittingly, that group's bid for glory will be made in the first week of the Olympics. The sharpest international postgraduate science students will travel to England from around the globe to participate in the Hermes 2012 event.
The Royal Society of Chemistry is sponsoring this visit to the UK of the hand-picked young scientists, who will gather at Cumberland Lodge in Windsor Great Park...
(Excerpt) Read more at rsc.org ...
Because G_d made it that way.
In fact, only The Lord knows. Ask Bacon or Aristotle or even anyone living.
This 'contest' is an effort to render objectivity as evil.
Close; but one of my courses in Chemical Engineering explained it so many years ago.
Now where do I collect my prize?
Every once in a while I would answer my geology or physics exam questions with that if I had no clue. Never worked though - although it is the truth!
How did anyone prior to refrigeration know that boiling water freezes faster than cold water?
I think the mythbusters busted that myth btw.
FReepmail me if you want on or off my health and science ping list.
One things for certain, if it didn't we'd all drown.
The two most volatile elements, put em together and they kill fire. Without chlorine life as we know it wouldn't exist either. Oh but it's all randumb chance, and accidental.
Why does ice float?
I did not know that. I honestly did not know that.
The Mpemba Effect, good one... cold water is more dense, so there’s more of it from which to remove heat? Oh wait, that doesn’t work, water is one of the few (or the only?) material which increases in volume as it approaches the freezing point (hence, ice floats), and as the temperature continues to fall in the ice, *then* starts to shrink.
For 40 years I've been told that the "hot water freezes faster" thing is a myth.
I feel that this "contest" is meant to be a joke.
Here's a summary of the Wikipedia explanation:
The oxygen atom in each water molecule attracts electrons more strongly than the hydrogen atoms, so the hydrogens have a slight positive charge. This allows water to form "hydrogen bonds" in which the positive hydrogens are attracted to the negative oxygen atoms of other molecules.
Each hydrogen can form a hydrogen bond with another water molecule and each oxygen can bond with two hydrogen atoms, so altogether one water molecule can have up to 4 hydrogen bonds with other water molecules. In an ice crystal there is a lattice of water atoms held together with these "hydrogen bonds".
The hydrogen bonds have a certain length that holds the water molecules in position at a certain distance apart from each other. As the ice is heated and melts, fewer hydrogen bonds can form, the lattice structure breaks, and the water molecules are allowed to come slightly closer together. This causes liquid water to have a lower density.
Because of the down hill slide effect.
Now send me my money. . . . .
That was what i was taught too, except that liquid water has a higher density, not lower, compared with ice.
If I remember correctly, water is at it’s densest at about 39 or 40 degrees Farenheit. The surrounding water around the ice is about or near that temperature. Lowest specific gravity always floats, while highest sinks.
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