Archived posting to the Leica Users Group, 2019/12/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]When water freezes, it expands. This is why if you freeze a canned or bottled beverage, the container will rupture. The water on the surface of the birdbath froze in a thin sheet, and then as it continued to freeze deeper, the newly-formed ice had to go somewhere. It went up. Road asphalt expands when it gets hot; you've probably seen roads buckled from the heat, like these: https://media2.kobi5.com/wp-content/uploads/2019/06/seattle-road.jpg?x18239 https://cdn20.patchcdn.com/users/22909805/20170417/031832/styles/T600x450/public/article_images/screen_shot_2017-04-17_at_31741_pm-1492456689-3250.jpg or with a nod to Ric Carter, like these railroad tracks: https://toolkit.climate.gov/sites/default/files/styles/large/public/BuckledRail.jpg?itok=n8yTM6rZ Same principle. Expanding asphalt or rails must go somewhere. Likewise, expanding ice has to go somewhere. On 2019-12-19 9:37 am, Jim Nichols wrote: > Last night the temperature got down into the 20s F.? This morning, I > glanced out at a bird bath that stands in a clear area of the yard, > with nothing above it.? The water in the bird bath appeared frozen, as > I would expect, but a clear icicle was standing about eight inches > tall. > > What caused this? > > http://www.gallery.leica-users.org/v/OldNick/20191219-DSCF1538.JPG.html > > http://www.gallery.leica-users.org/v/OldNick/20191219-DSCF1539.JPG.html > > I'm sure someone must have the answer.