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I didn't know that!

Community Veteran
Posts: 7,149
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Registered: 30-08-2007

I didn't know that!

As a life long collector of useless information (is there a name that's printable for that?) I quite often tune into the Sky Discovery channel's "How do they do that" and "How it works" which are usually 10 minute quickies of assorted points of interest, most of which have been repeated many times.
A day or so ago a programme on how glass is made (that I hadn't seen before) was showing. I only had half an eye on it as the subject has been covered many times by other programmes, and anyway the process is quite well known.
Then suddenly the presenter said that; chemically glass is actually a liquid! indeed if it wasn't liquid we wouldn't be able to see through it. Indeed panes of glass left to their own devices over long periods of time creep downwards under their own weight, making them measurably thicker at the bottom than it was when it was installed...
I didn't know that.
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
24 REPLIES
Community Veteran
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Re: I didn't know that!

I did (proves I'm another collector of useless information).
jelv (a.k.a Spoon Whittler)
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Community Veteran
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Re: I didn't know that!

Comes with the "bright spark" status jelv.
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
itsme
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Re: I didn't know that!

Quote
Is glass liquid or solid?
It is sometimes said that glass in very old churches is thicker at the bottom than at the top because glass is a liquid, and so over several centuries it has flowed towards the bottom.  This is not true.  In Mediaeval times panes of glass were often made by the Crown glass process.  A lump of molten glass was rolled, blown, expanded, flattened and finally spun into a disc before being cut into panes.  The sheets were thicker towards the edge of the disc and were usually installed with the heavier side at the bottom.  Other techniques of forming glass panes have been used but it is only the relatively recent float glass processes which have produced good quality flat sheets of glass.

Quote
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.
Community Veteran
Posts: 7,149
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Registered: 30-08-2007

Re: I didn't know that!

Gee thanks itsme!!
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
Community Veteran
Posts: 7,149
Thanks: 51
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Registered: 30-08-2007

Re: I didn't know that!

Quote from: itsme
Quote
There is no clear answer to the question "Is glass solid or liquid?". 

Uhmm!!
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
Community Veteran
Posts: 18,545
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Registered: 12-08-2007

Re: I didn't know that!

Quote from: Petlew
Then suddenly the presenter said that; chemically glass is actually a liquid! indeed if it wasn't liquid we wouldn't be able to see through it. Indeed panes of glass left to their own devices over long periods of time creep downwards under their own weight, making them measurably thicker at the bottom than it was when it was installed...
I didn't know that.

Thanks Petlew I didn't know that either.  Now how can I bring that up in conversation Undecided  
Community Veteran
Posts: 7,149
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Registered: 30-08-2007

Re: I didn't know that!

Don't hang on to that glass of Merlot too long it may change shape in your hand...
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
Community Veteran
Posts: 18,545
Thanks: 191
Registered: 12-08-2007

Re: I didn't know that!

That would be a pane Wink
Community Veteran
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Registered: 30-08-2007

Re: I didn't know that!

Now where will this lead?
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
Community Veteran
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Registered: 05-04-2007

Re: I didn't know that!

Roll eyes
Community Veteran
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Re: I didn't know that!

I see a glazed look coming over you Be3G.
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
Community Veteran
Posts: 18,545
Thanks: 191
Registered: 12-08-2007

Re: I didn't know that!

Maybe he's shattered Wink
Community Veteran
Posts: 7,149
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Registered: 30-08-2007

Re: I didn't know that!

Or framed...
Experience; is something you gain, just after you needed it most.

When faced with two choices, simply toss a coin. It works not because it settles the question for you. But because in that brief moment while the coin is in the air. You suddenly know what you are hoping for.
itsme
Grafter
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Registered: 07-04-2007

Re: I didn't know that!

Quote from: Petlew
Quote from: itsme
Quote
There is no clear answer to the question "Is glass solid or liquid?".

Uhmm!!


There is a clear answer. If glass is a liquid what is the freezing point?