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Thread: Strange; glass lid shattered

  1. #1
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    Default Strange; glass lid shattered

    Heard a very loud crash from the kitchen. A glass lid, sitting where it's always sat, with no heat or sun, simply shattered into hundreds of pieces.
    "Banning books and not guns seems backwards. Can't think of anyone ever shot by a book

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    Default Re: Strange; glass lid shattered

    Sometimes, though, rarely, the algorithm controlling the Matrix experiences a hiccup. <G>
    David G
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    Default Re: Strange; glass lid shattered

    Micro meteor?

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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by bluedog225 View Post
    Micro meteor?
    More likely roughhousing pixies <G>
    David G
    Harbor Woodworks
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    "It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)

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    Default Re: Strange; glass lid shattered

    Cat?

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    Default Re: Strange; glass lid shattered

    Chasing a rat?

  7. #7
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    Default Re: Strange; glass lid shattered

    Poltergeist
    ITS CHAOS, BE KIND

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    Default Re: Strange; glass lid shattered

    Tempered glass unlike the name has internal stresses. I still like it.

    Tom

  9. #9
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    Default

    Tempered glass is weird stuff.

    And glass is a super-cooled liquid. As it ages, it acquires [microscopic] scratches that act to weaken/break the surface tension. So as glass ages it becomes effectively more brittle/fragile.

    https://en.wikipedia.org/wiki/Prince_Rupert%27s_drop

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    Default Re: Strange; glass lid shattered

    Back about 1982, the family was in the den, and we heard a loud boom from the kitchen pantry. Investigation showed that a 2-liter glass bottle of Diet Pepsi had exploded, nothing hit against it or dropped on it. We were relieved that neither our young son or daughter was in the kitchen when it happened.




    Rick
    Charter Member - - Professional Procrastinators Association of America - - putting things off since 1965 " I'll get around to it tomorrow, .... maybe "

  11. #11
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    Default Re: Strange; glass lid shattered

    Glass is a liquid.

  12. #12
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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by lupussonic View Post
    Glass is an amorphous solid.
    ftfy
    Simpler is better, except when complicated looks really cool.

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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by Paul Pless View Post
    ftfy
    Nope, it IS asupercooled liquid.
    It really is quite difficult to build an ugly wooden boat.

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  14. #14
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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by Peerie Maa View Post
    Nope, it IS asupercooled liquid.
    negative, but please do play again
    Simpler is better, except when complicated looks really cool.

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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by Paul Pless View Post
    negative, but please do play again
    If you are reading the Scientific American piece, you have been trapped by subtle semantics.
    It is sometimes said that glass is therefore neither a liquid nor a solid. It has a distinctly different structure with properties of both liquids and solids. Not everyone agrees with this language.
    https://math.ucr.edu/home/baez/physi...ass/glass.html
    Last edited by Peerie Maa; 08-21-2022 at 05:41 AM.
    It really is quite difficult to build an ugly wooden boat.

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  16. #16
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    Default Re: Strange; glass lid shattered

    I used to like thick glass pint beer mugs. Over time, the three of them all developed cracks. None shattered but I concluded that some stresses had been locked in as they cooled. If the glass lid was quite thick, as I expect it was, something similar may have happened.
    IMAGINES VEL NON FUERINT

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    Default Re: Strange; glass lid shattered

    Wife drove a Ford Fiesta for a few years. One day she was driving, me as passenger. With no warning whatsoever the passenger window exploded inward. I saw a brief flash then was covered in broken glass bits. She freaked, nearly lost control. I talked her down to brake, pull to the side. Her window was fine so it wasn’t a gunshot. Maybe a rock? Meteorite? No idea, other than panel flexing though that road was paved, straight, level. Weird stuff.

  18. #18
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    Default Re: Strange; glass lid shattered

    Glass in old windows is thicker at the bottom than at the top.

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    Default Re: Strange; glass lid shattered

    In the early 1960s, I puta hot bottle of 7Up on ice and it blew up, still have the scars on my arm.

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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by ron ll View Post
    Glass in old windows is thicker at the bottom than at the top.
    zackly.

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    Default Re: Strange; glass lid shattered

    They used to have glass 2 liter bottles of coke?

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    Default Re: Strange; glass lid shattered

    We had a poltergeist the other day. A mirror is broken now, but no great matter.

    What was more interesting is the conversation 3 of us were having standing 4 feet from the mirror at the time, and the crash coming timed exactly as if it was an answer to some of the discussion.

    Umm, "as if."

    Because of course nobody really thinks that there might be entities we can't ordinarily see which actually take an interest in influencing things in our lives, and behavior.

    "Coincidence" sure had uncanny timing though, in this case. Like, timing which a director of a movie would hope to have for an "effect."
    If I use the word "God," I sure don't mean an old man in the sky who just loves the occasional goat sacrifice. - Anne Lamott

  23. #23
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    Default Re: Strange; glass lid shattered

    Quote Originally Posted by J.Madison View Post
    They used to have glass 2 liter bottles of coke?
    32oz was the largest glass soda bottle that i remember
    Simpler is better, except when complicated looks really cool.

  24. #24
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    Default Re: Strange; glass lid shattered

    "A lot of people hear that glass is a liquid when they hear about this particular misconception. Actually it is probably better to describe glass as an amorphous solid. Any variation in thickness comes strictly from manufacturing processes.
    Molten glass is gathered on a blowpipe, and blown to an elongated balloon shape . The ends are cut off and the resulting cylinder is split with shears while still hot, then flattened on an iron plate. This is the forerunner of the Cylinder process. The quality of the glass was not good, with many imperfections.
    (By the way, finding original source documents on actual manufacturing of glassis bloody difficult... Many reference pages are dead, and most other pages are referring to this particular "flow" question.)
    A bit of history on glass. Humans have known how to make glass starting as early as 3000 BCE (Yale PDF). And the idea of making windows dates back to the height of the ancient Egyptians (though none survive that I am aware of). However, many other glass objects are available for measurement.
    The University of California Riverside has a much more in-depth description on their web page concerning the structure of glass, and explaining why it doesn't flow. It concludes with:
    There is no clear answer to the question “Is glass solid or liquid?”. In terms of molecular dynamics and thermodynamics it is possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter that is neither liquid nor solid. The difference is semantic. In terms of its material properties we can do little better. There is no clear definition of the distinction between solids and highly viscous liquids. All such phases or states of matter are idealisations of real material properties. Nevertheless, from a more common sense point of view, glass should be considered a solid since it is rigid according to everyday experience. The use of the term “supercooled liquid” to describe glass still persists, but is considered by many to be an unfortunate misnomer that should be avoided. In any case, claims that glass panes in old windows have deformed due to glass flow have never been substantiated. Examples of Roman glassware and calculations based on measurements of glass visco-properties indicate that these claims cannot be true. The observed features are more easily explained as a result of the imperfect methods used to make glass window panes before the float glassprocess was invented.
    Glasslinks has some additional information about the properties of glass itself:
    The idea that glass is a fluid is a very widespread myth,” says Yvonne Stokes, a mathematician and spoilsport at the University of Adelaide in Australia. “I was told it as a fact by my adviser. And once, a class of schoolchildren came into the lab, and one of them told me the very same thing. If you want to talk microscopically, then you can call glass a fluid. But people understandably tend to think that if it’s a fluid, it flows. It’s that notion that’s false.”Stokes has recently proved with detailed calculations that old windows could not have flowed perceptibly.
    If the myth survives, it will be because it contains a kernel of truth – and because glass is a confusing kind of matter, quite unlike the three ordinary kinds. A gas is an anarchy of molecules going every which way; a liquid is a tighter but still disorderly society in which molecules constantly dissolve and reestablish weak bonds; a solid is a molecular army in rigid formation.But glass is … none of the above. It is rigid like a solid, but its molecules are not arranged in repeating crystals. It is amorphous like a liquid.
    In fact, structurally there is no sharp line between a liquid and a glass. You form glass by ‘super cooling” a liquid below its freezing point, then cooling it some more. If you cool it fast enough, the molecules can’t organize themselves into crystals. As the temperature drops, the liquid becomes more viscous and the molecules more sluggish. It’s like a game of molecular musical chairs in which the music never stops and the players never sit down; instead they seem to move through honey, then tar, until they are all but motionless, like bugs in amber."

    https://skeptics.stackexchange.com/q...e-to-flow#7534

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