Hot water freezes faster than cold water (Mpemba Effect)(math.ucr.edu)
math.ucr.edu
Hot water freezes faster than cold water (Mpemba Effect)
http://math.ucr.edu/home/baez/physics/General/hot_water.html
15 comments
And yet, cold water doesn't boil faster than hot water. Weird.
Except under very specific conditions, this is NOT TRUE.
Do not fill your ice cube trays with hot water thinking it will freeze faster.
Do not fill your ice cube trays with hot water thinking it will freeze faster.
Sure, but the fact that it ever happens is fascinating.
Are you sure about that? Maybe I should try it. The article certainly contradicts you.
Indeed, cjc sounds like someone who has already tried this at home, right? What circumstances are different between ice cube trays and ice cream mixture? High surface area comes to mind. In the article the experiments described all involve volumes of water (or ice cream goo) that are in containers with low surface area to volume. SA and Volume do not scale linearly, thus the heat exchange rate would be faster for the ice cube trays. Of course, TRYING it out would not hurt. Several hundred years worth of scientists seem to have laughed at previous experimental results out of some egotistical belief that experimental results passed down from history are fairy tales.
oh i will like i care what you say dumbo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Man, everything I did for my third grade science experiment was a lie. Sorry Ms. Mariano
many people think many things. im doing this 4 a science project and so far hot water freezes faser then cold water except on artical
many people think many things. im doing this 4 a science project and so far hot water freezes faser then cold water except on artical
My father showed me how much faster hot water freezes in an experiment we did when I was a kid. How many of us owe our fathers for what seems to be innate curiosity now that we are adults :)
I've done it a bunch of times and never had hot water freeze faster. How did you (or your dad) set it up?
And/or you inherited the curiosity trait.
I fall on the side of nurture with regard to curiosity. _Everybody_ has "the curiosity trait", but in some environments it's discouraged: "Stop asking so many questions.", or "I don't know and why do you care?", or simply giving wrong answers.
Or the "prove your mom wrong" trait. That seemed to be his motivation, heh-heh.
Boiled water freezes faster because the impurities have been burned out