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why is ice slippery?
Why is ice slippery? When other substances such as metal or candlewax reach
a temperature that solidifies them they are not slippery so why water? |
why is ice slippery?
"bob watkinson" wrote in message
... Why is ice slippery? When other substances such as metal or candlewax reach a temperature that solidifies them they are not slippery so why water? Interesting question. Google found me the following: http://www.exploratorium.edu/hockey/ice2.html HTH, Steve |
why is ice slippery?
"SteveS" wrote in message . .. "bob watkinson" wrote in message ... Why is ice slippery? When other substances such as metal or candlewax reach a temperature that solidifies them they are not slippery so why water? Interesting question. Google found me the following: http://www.exploratorium.edu/hockey/ice2.html HTH, Steve Thanks Steve. I wonder if water is the only substance to behave this way when it freezes. |
why is ice slippery?
On Wed, 26 Jan 2005 11:12:36 GMT, "SteveS"
wrote: "bob watkinson" wrote in message ... Why is ice slippery? When other substances such as metal or candlewax reach a temperature that solidifies them they are not slippery so why water? Interesting question. Google found me the following: http://www.exploratorium.edu/hockey/ice2.html Ice is quite different to other slippery substances. Teflon's fluorine filled molecules repel most other molecules (except fried egg) hence why PTFE is slippery. Graphite consists of layers of sheets of carbon atoms in a particular lattice and the forces between sheets are weak, so they can easily slide across each other. As for slippery ice, I have noticed that ice can become quite "sticky" at low temperatures - this, I presume, is due to the moisture layer on the skin, car tyre or sole of your boot freezing to the ice. Nearly everyone has experienced the strange effect when touching the coils of your home freezer and your fingers sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. Martin HTH, Steve |
why is ice slippery?
bob watkinson wrote:
Why is ice slippery? When other substances such as metal or candlewax reach a temperature that solidifies them they are not slippery so why water? It is more slippery when wet, rather than when dry. (coefficient of friction = 0 = wet ice on wet ice) Clean smooth metal surfaces can be very slippery, as can some smooth stone floors. Smooth = slippery = no friction. -- Gianna Stefani www.buchan-meteo.org.uk |
why is ice slippery?
On Wed, 26 Jan 2005 11:36:17 +0000, bob watkinson wrote:
Thanks Steve. I wonder if water is the only substance to behave this way when it freezes. There's a lot of explanation of the unusual properties of water he http://www.lsbu.ac.uk/water/anmlies.html Mike |
why is ice slippery?
On Wed, 26 Jan 2005 12:10:00 +0000, JPG wrote:
sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. Ouch. :( How did you get it off - simply pull hard (so losing some skin) and get someone to douse it with water? |
why is ice slippery?
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why is ice slippery?
"Mike Causer" wrote in message news:pan.2005.01.26.13.35.48.404111@firstnamelastn ame.com.invalid... On Wed, 26 Jan 2005 11:36:17 +0000, bob watkinson wrote: Thanks Steve. I wonder if water is the only substance to behave this way when it freezes. There's a lot of explanation of the unusual properties of water he http://www.lsbu.ac.uk/water/anmlies.html Mike fascinating site, many thanks |
why is ice slippery?
"JPG" wrote Nearly everyone has experienced the strange effect when touching the coils of your home freezer and your fingers sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. I had a parallel problem at Gatwick one night. The car door lock was iced up and as I tried to turn the key, the torque was sufficient to twist me instead of the key. The ground was very slippery, my feet went from under me and I landed quite gently on my bum. Mind you, half an hour earlier, I had put 20 tonnes of aircraft smoothly (?!) onto the runway, so I was in good practice at doing gentle touchdowns:-) Jack |
why is ice slippery?
"Jack Harrison" wrote in message .. . "JPG" wrote Nearly everyone has experienced the strange effect when touching the coils of your home freezer and your fingers sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. I had a parallel problem at Gatwick one night. The car door lock was iced up and as I tried to turn the key, the torque was sufficient to twist me instead of the key. The ground was very slippery, my feet went from under me and I landed quite gently on my bum. Mind you, half an hour earlier, I had put 20 tonnes of aircraft smoothly (?!) onto the runway, so I was in good practice at doing gentle touchdowns:-) Jack Lol. thanks for the lovely picture :) |
why is ice slippery?
mjones wrote:
sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. Ouch. :( How did you get it off - simply pull hard (so losing some skin) and get someone to douse it with water? An urban legen horror story told in cold countries: Group of boys are at railway tracks in winter. The others tell the youngest to lick rail. His tongue sticks. Rain approaches. All they can do is p** him loose. |
why is ice slippery?
SteveS wrote:
"bob watkinson" wrote in message ... Why is ice slippery? When other substances such as metal or candlewax reach a temperature that solidifies them they are not slippery so why water? Interesting question. Google found me the following: http://www.exploratorium.edu/hockey/ice2.html "These new findings challenge long-held theories about why ice is slippery. In the past, scientists believed that either pressure or friction melted the ice, creating a water lubricant that allows skates and pucks to slide." The above statement makes me wonder what is meant by "new", "in the past" and, possibly, "scientists". A book on ice published over forty years ago quashed the idea that slipperiness was due to surface lubrication resulting from pressure-melting. It explained that the surface slippery layer was due to peculiar characteristics of the molecular structure of ice at the surface. Yet another "new" discovery that is no such thing. Graham |
why is ice slippery?
"Elena Saltikoff" schreef in bericht ... mjones wrote: sticking to it. I had a similar experience in Canada when at -20 C I got my hand stuck to the car door handle. Ouch. :( How did you get it off - simply pull hard (so losing some skin) and get someone to douse it with water? An urban legen horror story told in cold countries: Group of boys are at railway tracks in winter. The others tell the youngest to lick rail. His tongue sticks. Rain approaches. All they can do is p** him loose. Something similar: Told for real in a Dutch paper, many years ago |
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