WTF?!?!? How is this done?? Someone please physics me.

It called freezing

I gather he saying -41 Celsius

°C to °F Multiply by 9, then divide by 5, then add 32

Its -41 degrees Fahrenheit

http://math.ucr.edu/home/baez/physics/General/hot_water.html

http://en.wikipedia.org/wiki/Mpemba_effect

The "Mpemba effect", hot water freezing faster than cold water, is not currently well understood. Some possible explanations are (summed up from above reading).

Evaporation of hot water is a heat transport method out of the main body of liquid, causing a super cooling effect.

Convection currents in warmer water might spread around ice crystals faster.

Frost effect will tend to cause a generally slow freezing from the top instead of warm water from the bottom and sides

None of these give a full account to the phenomena and each has been individually ruled out as the sum total of the effect. Some myriad of factors or some basic lack of insight into thermodynamics is most likely the culprit.

The short of it is...no one really knows.

What does "wow" mean in English?

We've done this trick in our back yard in Winnipeg when it gets cold enough to try it.

Since we live in a bungalow, we have to toss the water up into the air rather than pouring it off a balcony, but it makes the same curious hissing sound as you can hear in this video starting at about the 29 second mark.

Is that just the sound that water makes when it crystallises very quickly, or is there some other physics at play?

An exclamation or expression of amazement, incredulity, wonder or admiration. In Russian it's like "VOY!"

hot water freezes more rapidly than lukewarm or room temperature water... that's what you're seeing -- hot water, freezing nearly instantly.

Perhaps because the h2o molecules, when heated, are further spread out. This makes it easier for the heat energy to be leached from an essentially larger surface area.

Russia! They can make yellow snowflakes, too.

I always thought it was because hot water vapour cools faster. Guess there is more too it than that.

Fake.... they cut scenes. Didn't you guys see the green screen?

Wow, I'm honestly more surprised at the birds flying around at -41c. That is... quite cold. I really thought any birds that small would have to migrate in temperatures like that.

Hate to be an arctic genie.

-41 is painful, when your eyes are open you can feel crystals forming on your eyeballs, and then when you blink to thaw them out your eyelids tend to freeze together a bit.

Yup, I have fond memories of -45°c to -30°c
I've frozen the moisture in my eyes, glues my nostrils together and grown an icicle beard from my breath and nose many a time.

I remember back in high school when they shut down the schools because it was too cold. knowing this, my boss called and asked if I wanted to work for the day. I said yes, but had no transportation. I walked the 5km into town in -37°c. When I got there, I had icicles on my face, my scarf was frozen solid from breathing through it, and my eyebrows were frozen to my toque. It took me an hour to thaw out before I could even start working. After which, my boss said, I should have just said something and he would have just whipped over and picked my up.
Ah to be young, stupid and stuborn

Experiments at -41°С - Instant vapor has been added as a related post - related requested by oritteropo on that post.

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