Don't believe it
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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:
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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.
oh my god, saying "it's too cold to snow" is like saying "I am not the boss of my company" :laugh:
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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.
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Mpemba effect[^] /Fredrik
My Android apps in Google Play; Oakmead Apps
Was gonna post this, but I was beaten to it. Good link. :thumbsup:
Regards, Nish
Blog: voidnish.wordpress.com Latest article: C++ 11 features in Visual C++ 2013 Preview
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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.
Chris Maunder wrote:
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.
That was what Dave C told me on my first day in Canada. That in winter it doesn't snow more when it's at its coldest. Never understood the thinking behind that. :-)
Regards, Nish
Blog: voidnish.wordpress.com Latest article: C++ 11 features in Visual C++ 2013 Preview
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Chris Maunder wrote:
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.
That was what Dave C told me on my first day in Canada. That in winter it doesn't snow more when it's at its coldest. Never understood the thinking behind that. :-)
Regards, Nish
Blog: voidnish.wordpress.com Latest article: C++ 11 features in Visual C++ 2013 Preview
It happens because the maximum amount of water vapor air can hold goes down as it gets colder. That's why the heaviest snowfall is when it's only slightly below freezing; and why while states like Tennessee and North Carolina don't get as much total snow as we do in Pennsylvania or Ohio they're prone to occasional massive storms when the freeze line crashes into warm humid gulf air over their heads. OTOH because it blows around the dry powder that falls when it's colder can be more of a PITA because you have to keep shovelling it over and over again than the wet snow that will stay in place once it's down. On the gripping hand because most of Canada gets cold enough that the snow pack never melts off till spring the cumulative impact of lots of small snow storms when it's really cold still turns into really thick layers covering the ground everywhere.
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, waging all things in the balance of reason? Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful? --Zachris Topelius Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies. -- Sarah Hoyt
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It happens because the maximum amount of water vapor air can hold goes down as it gets colder. That's why the heaviest snowfall is when it's only slightly below freezing; and why while states like Tennessee and North Carolina don't get as much total snow as we do in Pennsylvania or Ohio they're prone to occasional massive storms when the freeze line crashes into warm humid gulf air over their heads. OTOH because it blows around the dry powder that falls when it's colder can be more of a PITA because you have to keep shovelling it over and over again than the wet snow that will stay in place once it's down. On the gripping hand because most of Canada gets cold enough that the snow pack never melts off till spring the cumulative impact of lots of small snow storms when it's really cold still turns into really thick layers covering the ground everywhere.
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, waging all things in the balance of reason? Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful? --Zachris Topelius Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies. -- Sarah Hoyt
Thanks, I believe Dave explained something similar to me. It makes sense when you think of it.
Regards, Nish
Blog: voidnish.wordpress.com Latest article: C++ 11 features in Visual C++ 2013 Preview
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Chris Maunder wrote:
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.
That was what Dave C told me on my first day in Canada. That in winter it doesn't snow more when it's at its coldest. Never understood the thinking behind that. :-)
Regards, Nish
Blog: voidnish.wordpress.com Latest article: C++ 11 features in Visual C++ 2013 Preview
The flakes are smaller the colder it gets (not as sticky) and when it's been cold for a long time open bodies of water start freezing over so there's less fuel. And yeah, the absolute humidity is lower hence less water per cubic meter of air, but given a water supply it'll snow, especially if the wind is blowing. Lower water density, but more volume of air per second means lots of water still available to make your day a mess. And this is e same Dave who wandered around downtown with me when it was -5C in a tshirt. I almost turned around and got back on the plane then and there.