Don't believe it
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
yes, it's real. and my FB feed is currently full of people demonstrating that it works in their back yards. cold air, pot full of hot water => snow
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Not quite - boiled water has dissolved gasses removed, and will freeze faster. When you heat water on a stove to boiling point, you will see bubbles form for some time before the water reaches the boiling point. This is dissolved gases coming out of solution, and if you capture the bubbles, you will see that their content is not H2O. Once the water reaches boiling point ("rolling boil"), then the water is changing phase and the content of gas emitted is water vapor (H2O). Water (even boiling water) that has the dissolved gases removed will freeze faster than warm or even cold water.
Never moon a werewolf. - Harvey
Thanks - (in danger of being a complete pain in the arse) has this theory been peer reviewed scientifically? I ask this as having just done a quickish google there do appear to be a few theories none of which have been conclusively proven correct. e.g. Mpemba theory[^]
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
More to the point: given the amount of snow they already have, why are they adding any blooming more? :laugh:
Never underestimate the power of stupid things in large numbers --- Serious Sam
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Thanks - (in danger of being a complete pain in the arse) has this theory been peer reviewed scientifically? I ask this as having just done a quickish google there do appear to be a few theories none of which have been conclusively proven correct. e.g. Mpemba theory[^]
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
When taking engineering courses it was explained by the fact the hot water is losing energy already where as cold water has to start losing heat(energy). Poor man's explanation after 30 plus years of forgetting. At the time we calculated the "proof".
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Yah believe it. We have had frost quakes[^] in Canada here.
Silvabolt wrote:
frost quakes
I read that Frosted Flakes[^] :-O
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More to the point: given the amount of snow they already have, why are they adding any blooming more? :laugh:
Never underestimate the power of stupid things in large numbers --- Serious Sam
:thumbsup:
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When taking engineering courses it was explained by the fact the hot water is losing energy already where as cold water has to start losing heat(energy). Poor man's explanation after 30 plus years of forgetting. At the time we calculated the "proof".
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That is saying that energy loss has momentum. I don't think that is true, and it should be relatively easy to prove in a lab. [Haven't done it myself...]
Never moon a werewolf. - Harvey
As I say I do not remember exactly what the science was but I remember doing the calculations.
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
Don't forget we use Fahrenheit so -15 here is a lot colder than -15 there : )
Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
It works - really! A couple of points, though... The liquid immediately separates into droplets, vastly increasing the surface area exposed to the cold, plus it is moving, effectively the same as a stiff breeze. Both factors contribute to the rapid freezing. Besides, it's been really, really cold. It was so cold, in fact, that Miley Cyrus stuck to her wrecking ball, and a Liberal in D.C. was spotted with his hands in his own pockets!
Will Rogers never met me.
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It works - really! A couple of points, though... The liquid immediately separates into droplets, vastly increasing the surface area exposed to the cold, plus it is moving, effectively the same as a stiff breeze. Both factors contribute to the rapid freezing. Besides, it's been really, really cold. It was so cold, in fact, that Miley Cyrus stuck to her wrecking ball, and a Liberal in D.C. was spotted with his hands in his own pockets!
Will Rogers never met me.
Roger Wright wrote:
and a Liberal in D.C. was spotted with his hands in his own pockets!
:thumbsup::thumbsup:
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
These were American Yuppies throwing the water, so they used Perrier VSOP Vergèze Extra Lite, which retails for US $50 per liter. That vintage boils at only 60C.
“There are obvious things, and there are many obvious things no one tried, because no one needed to try them.” Sergey Alexandrovich Kryukov, January 1, 2014
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Not quite - boiled water has dissolved gasses removed, and will freeze faster. When you heat water on a stove to boiling point, you will see bubbles form for some time before the water reaches the boiling point. This is dissolved gases coming out of solution, and if you capture the bubbles, you will see that their content is not H2O. Once the water reaches boiling point ("rolling boil"), then the water is changing phase and the content of gas emitted is water vapor (H2O). Water (even boiling water) that has the dissolved gases removed will freeze faster than warm or even cold water.
Never moon a werewolf. - Harvey
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Don't forget we use Fahrenheit so -15 here is a lot colder than -15 there : )
Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch
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MMMmmm, You are on to something but not totally I seem to remember a friend of mine (in Norway doing the same thing with non-boiling water the smaller droplets froze out right, the larger ones the surface froze and shattered(!) when it hit the ground, causing smaller droplets that froze and repeated the process until it just ran out of energy! and froze!. Too bloomin cold for me!! :sigh:
glennPattonWork wrote:
in Norway
Today we expect temperatures around 7°C - not exactly what you would require for this to happen ...
Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS Projects promoting programming in "natural language" are intrinsically doomed to fail. Edsger W.Dijkstra
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If I hear another person say it's too cold to snow I'm going to send them outside, no gloves, no coat, no shoes, and ask them to take a good look around.
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I saw a clip on the news last night where in the US, to demonstrate it's getting pretty chilly, they threw some boiling water in the air only to have it fall to earth as snow. Like a scene out of the dismal 'Day after tomorrow'. Really? So it's going to drop 100c in a second and also dissipate it's latent heat to solidify in the space of a second flat in air - a very good heat insulator? I'm having a very hard time accepting this. What says the CodeProject community?
Regards, Rob Philpott.
The freakiest thing I've seen was yesterday morning. I have a tarp on the garage floor to catch the caked snow that falls off the car at night in a pathetic effort to stop the foul black melt from flowing over everything else I have stacked in the garage. In the morning there's a pool of water at the garage door from the melt, and when I open the door it flows outside. I always get a broom and sweep it out of the way into a nearby (2 feet away) drain so I don't get a thicker and thicker ice slab building up. Yesterday, as I swept the water from the garage it almost immediately thickened, went slushy, then granular, and then within half a foot of the drain I was no longer pushing water but rolling a log of cookie-dough consistency frozen slush about 3 inches wide. Time was about 5-10 seconds from running water to the cookie dough event horizon. Back home to Australia in 4 weeks. Can. Not. Wait.
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Yah believe it. We have had frost quakes[^] in Canada here.
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The freakiest thing I've seen was yesterday morning. I have a tarp on the garage floor to catch the caked snow that falls off the car at night in a pathetic effort to stop the foul black melt from flowing over everything else I have stacked in the garage. In the morning there's a pool of water at the garage door from the melt, and when I open the door it flows outside. I always get a broom and sweep it out of the way into a nearby (2 feet away) drain so I don't get a thicker and thicker ice slab building up. Yesterday, as I swept the water from the garage it almost immediately thickened, went slushy, then granular, and then within half a foot of the drain I was no longer pushing water but rolling a log of cookie-dough consistency frozen slush about 3 inches wide. Time was about 5-10 seconds from running water to the cookie dough event horizon. Back home to Australia in 4 weeks. Can. Not. Wait.
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glennPattonWork wrote:
in Norway
Today we expect temperatures around 7°C - not exactly what you would require for this to happen ...
Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS Projects promoting programming in "natural language" are intrinsically doomed to fail. Edsger W.Dijkstra
True, very true, still 7'C is cold as far as I'm concerned I'm sure I should have been born in Jamaica :laugh:
