- #1
Studiot
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Is this a joke?
Well at face value it sounds like a stupid contest and the link to the contest stie is broken...Studiot said:Not as far as I'm aware, but then it was only reported by the BBC at 1pm today as coming from Imperial College, and The Royal Institute of Chemistry.
That has little effect on the energy requirements, so little effect on the time.Khashishi said:Really, I thought this was already solved. Hot water has less dissolved gases than cold water, so it has a higher freezing point.
the link to the contest stie is broken
russ_watters said:Well at face value it sounds like a stupid contest
The existence of the effect outside of poorly set up (or purposely set up?) experiments is dubious at best and the fact that it was "discovered" by an Indian high school student in a cooking class implies it may be in line with other dubious or overblown "discoveries" by Indian schoolchildren we've seen floating around (in fairness, not all are Indian, they just seem overrepresented). The've become somewhat of a meme.DragonPetter said:Why is it a stupid contest? Is there already an accepted explanation for the effect?
russ_watters said:an Indian high school student
Studiot said:
sophiecentaur said:What puzzles me is: the temperature of the 'hot water' will drop. On the way, it will pass the temperature that the 'cold water' started at. Unless there is some other factor that the experimenters haven't told us about, it is then the same stuff at the same temperature that the cold water was (it is now 'cold water') but later. How can it then (from that temperature) cool faster and overtake than the other lot of water?
Andre said:https://dl.dropbox.com/u/22026080/IMG_8810.JPG was taken right before the touching test
#1 and #2 are precooled boiled tap and rain water |(that did not react upon touching)
#3 is plain, not precooled tap water (apparently already partly frozen)
#4 and #5 are initially hot boiled tap and rain water (that flash froze upon touching a few seconds later).
Something trivial :P struck me there.
Andre said:I wanted to make clearer pictures so I wiped the condensated water off the tubes and then...?
Andre said:The hypothesis about impurities like dissolved gasses, delaying crystal forming appeared reasonable.
krd said:And before doing these, or any other, experiments, you're meant to have some kind of theory.
DragonPetter said:I don't think he is planning to submit his observations to any peer reviewed journal.
krd said:But there should be less dissolved gasses in the hot sample than the cool one.
Andre said:Oh and I submitted those observations I did in he second test, I'm just wondering if anybody sees what I see, with the key word 'condensation'
krd said:The condensation will be thermally neutral, and if anything may act as an insulator.