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Read More. The Citizen The Weekly Five. The Buzz. What's The Difference: Biodegradable Vs. Make sure you do your homework. By: Laurie L. Ice is great when you're skating or sipping a drink — but not so great when you're slipping down treacherous stairs. But surprisingly, the science behind exactly why ice is so slippery remains something of a mystery. Sure, it may just be water that got cold enough to make the phase transition from a liquid to a solid, but that's where its rebellious nature starts to show.
Other solids aren't slippery when they go through a state change. Magma cools and turns into igneous rock — and rock itself isn't slippery. What's more, ice doesn't necessarily become slippery because it's cold.
You could stroll on frozen concrete all day and not worry about slipping. So why does water get so slick even thought it's a solid? Here's the kicker: Scientists aren't exactly sure. They do know ice's slippery nature doesn't have anything to do with its state as a solid.
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Hughes proposed that the friction of objects sliding on the ice causes it to heat up enough to melt. While friction does indeed cause heat, it does not create enough heat to melt ice that is at a very low temperature. And yet, ice at low temperature still forms a slippery liquid layer. Also, frictional heating cannot explain why a slippery layer forms even if the object is perfectly motionless. While frictional heating can play a role in reducing friction for objects at high speed, it is not the dominant effect.
The exact details of why ice forms a slippery liquid layer, even when little pressure or friction is applied, is currently not completely settled by scientists and is an ongoing area of research. Ice has been found to always have a thin liquid layer on its surface, even at temperature well below freezing, and even in the absence of contact with any objects.
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