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Originally Posted by Finder
Ice contracts when it gets colder and expands when the sun hits it.
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That's the first time I've heard that - can anyone offer a quote from a physics textbook? I sold mine after college... I'm ready to stand corrected.
Water, as far as I know, becomes denser as it cools to +1 C, then, once in equilibrium at 0 C it starts expanding again (becoming less dense, allowing the solid state to float) - hence the reason ice makes things burst when it gets inside them. If ice expanded as it warmed (like most other solids do) then wouldn't it be impossible to thaw a frozen pipe without risking a burst?
At the lake, I wake up in the morning to find "pressure ridges" in the ice that formed overnight, as the ice became too big for the shoreline while cooling overnight.
R2B, I'm also interested in that online course!