Industrial flat glass, needs a flat earth

Could you learn to quote Danukenator? I'm tired of you claiming I am saying things I am not.

Quote from: EnglshGentleman on October 14, 2010, 07:37:11 PM

Quote from: Daniel39363 on October 14, 2010, 07:27:30 PM

I'm not sure if this has been mentioned before, as I did not read the whole thread, but this is how you can make flatglass without a curve on an uneven or curved surface...
The curve is exaggerated.

Quote from: Thork on September 17, 2010, 01:04:36 AM

First all this business about fillers, blocks of wood, flat area cut into the earth etc. None of that fits either RE or FE physics. For RE the top surface will be curved no matter what you do to the bottom. Your arguments are akin to saying the sea bulges up where there are mountains under it. It doesn't. The top surface of the liquid should follow the curvature of the earth regardless of what is underneath be it a wedge of wood or cut flat into the earth. RE physics says the molten tin will always curve on its surface. In this process it does not suggesting flat earth.

Your concept of gravity is incorrect. In RE physics it would create a flat plane.

Quote from: Thork on September 17, 2010, 01:26:40 AM

The bottom surface makes no difference to the upper surface. Where there are mountain chains under the sea, the sea does not rise up. Where there are valleys under the sea, the sea does not dip. The sea doesn't stay flat where the surface below is flat according to RE physics. Cutting into the earth would not make a flat top surface if the earth was round.

Quote from: Thork on September 17, 2010, 01:49:42 AM

If I cut a flat section out of the sea bed to make it flat, would the sea be flat on top?

Even if you made your glass bath cut into a flat bit of earth, the liquid would bulge up at the centre to follow the curvature of the earth. You are barking up the wrong tree.

Quote from: Thork on September 17, 2010, 05:14:03 PM

Now for any flat fluid related posts. Pick up a physics book. For a round earth fluids follow the curvature of the Earth no matter what you put them on. You dump them on a platform and they will bend in the shape of the earth on that flat platform. They will form a bulge perfectly matching the earth's circumference. Gravity will act on them and pull them towards the centre of the earth. Not straight down below it.

The Points in Order:

1. It has, and it was shot down. I posted some of the responses as a preemptive strike to objections.
2. You also don't understand displacement.
3. The scale would compensate for this. Also read the posted link above. Note also that flat glass is not perfectly flat, the OP stated that.

Could you learn to quote Danukenator? I'm tired of you claiming I am saying things I am not.

Fixed

Quote from: Daniel39363 on October 14, 2010, 07:27:30 PM

I'm not sure if this has been mentioned before, as I did not read the whole thread, but this is how you can make flatglass without a curve on an uneven or curved surface...


The curve is exaggerated.

Yes, the curvature is exaggerated.  In fact, the actual tank of molten tin is a relatively short part of the part of the process line, so the actual curvature would be insignificant.

Around 50 metres.  I think I came up with that way in the beggining of this post.  Also the glass still needs to be finished after coming out of the bath. 

Berny watching Bullshit

Quote from: markjo on October 14, 2010, 07:52:29 PM

Quote from: Daniel39363 on October 14, 2010, 07:27:30 PM

I'm not sure if this has been mentioned before, as I did not read the whole thread, but this is how you can make flatglass without a curve on an uneven or curved surface...


The curve is exaggerated.

Yes, the curvature is exaggerated.  In fact, the actual tank of molten tin is a relatively short part of the part of the process line, so the actual curvature would be insignificant.

Around 50m.  I think I came up with that way in the beggining of this post.  Also the glass still needs to be finished after coming out of the bath. 

Berny watching Bullshit

50m?

In figure 1, you see the curve of the earth with the building, and with a liquid (in this case water) inside. As you can see, although the earth is curved, the water is not, it is level. I will explain why using figure 2. The arrows represent the force of gravity going towards earth's core.

Figure B shows a cross section of the earth with two oceans, one on the left (A), and one on the right (B). You can see, that with figure B, there is no flat building to resist gravity, every molecule is being pulled toward the center of the earth (not the surface of solid earth as I believe you suggested when you talked about mountains on the ocean floor). Because every molecule is being pulled with relatively equal force, it will try to get as close to the center as it can. The curve of the water occurs because it has settled, the surface of the water is the same distance from the center of the earth no matter where you look.

In figure A, you can see that the flat surface is creating resistance, especially on the sides. The water molecules are trying to get as close as possible to the center of the earth. The reason the water is not curved here is because gravity is pulling on each molecule with equal force, but because there is a flat base creating resistance, the water must form to have a flat surface as well, so that each molecule is as close as possible to the center of the earth.

In figure 1, you see the curve of the earth with the building, and with a liquid (in this case water) inside. As you can see, although the earth is curved, the water is not, it is level. I will explain why using figure 2. The arrows represent the force of gravity going towards earth's core.

Figure B shows a cross section of the earth with two oceans, one on the left (A), and one on the right (B). You can see, that with figure B, there is no flat building to resist gravity, every molecule is being pulled toward the center of the earth (not the surface of solid earth as I believe you suggested when you talked about mountains on the ocean floor). Because every molecule is being pulled with relatively equal force, it will try to get as close to the center as it can. The curve of the water occurs because it has settled, the surface of the water is the same distance from the center of the earth no matter where you look.

In figure A, you can see that the flat surface is creating resistance, especially on the sides. The water molecules are trying to get as close as possible to the center of the earth. The reason the water is not curved here is because gravity is pulling on each molecule with equal force, but because there is a flat base creating resistance, the water must form to have a flat surface as well, so that each molecule is as close as possible to the center of the earth.

This makes a great point, but before any FE'ers harp about it, clearly the scale is exaggerated to make his point clear.

3. The scale would compensate for this. Also read the posted link above. Note also that flat glass is not perfectly flat, the OP stated that.

Where does it say that in the OP. It actually says quite the opposite.

In figure A, you can see that the flat surface is creating resistance, especially on the sides. The water molecules are trying to get as close as possible to the center of the earth. The reason the water is not curved here is because gravity is pulling on each molecule with equal force, but because there is a flat base creating resistance, the water must form to have a flat surface as well, so that each molecule is as close as possible to the center of the earth.

Your diagrams show a misunderstanding of how this works. Look at figure 2. In water slab A, the middle of it is the closest to the Earth, which means that the middle part of it is going to have the greatest gravitational pull on it. The edges that are farther from the core are going to be less affected by gravity. Because of this, the water is going to be pulled slightly towards the center creating a bulge. In water slab B, all parts of it are at equal distance from the Earth, which means that all parts have the an equal gravitational force on them, meaning that there will be no bulge.

Did you two read what I posted for you at all?

Now for any flat fluid related posts. Pick up a physics book. For a round earth FLUIDS FOLLOW THE CURVATURE OF THE EARTH no matter what you put them on. You dump them on a platform and they will bend in the shape of the earth on that flat platform. They will form a bulge perfectly matching the earth's circumference. Gravity will act on them and pull them towards the centre of the earth. Not straight down below it.

In water slab A, the middle of it is the closest to the Earth, which means that the middle part of it is going to have the greatest gravitational pull on it. The edges that are farther from the core are going to be less affected by gravity. Because of this, the water is going to be pulled slightly towards the center creating a bulge.

Do I understand you correctly, because the center is pulled harder toward the earth is there a bulge in center and because the sides pull is weaker they should be closer to the bottom? Shortly, the stronger the pull the greater the bulge?

Quote from: EnglshGentleman on October 14, 2010, 11:01:13 PM

In water slab A, the middle of it is the closest to the Earth, which means that the middle part of it is going to have the greatest gravitational pull on it. The edges that are farther from the core are going to be less affected by gravity. Because of this, the water is going to be pulled slightly towards the center creating a bulge.

Do I understand you correctly, because the center is pulled harder toward the earth is there a bulge in center and because the sides pull is weaker they should be closer to the bottom? Shortly, the stronger the pull the greater the bulge?

Kinda. The farther something is away from the core, the greater the angle that the water is pulled, which means that even if it is in a flat container, it is going to move along it and create a bulge at the point that is closest to the Earth. Consider this.

Quote from: zork on October 14, 2010, 11:34:40 PM

Quote from: EnglshGentleman on October 14, 2010, 11:01:13 PM

In water slab A, the middle of it is the closest to the Earth, which means that the middle part of it is going to have the greatest gravitational pull on it. The edges that are farther from the core are going to be less affected by gravity. Because of this, the water is going to be pulled slightly towards the center creating a bulge.

Do I understand you correctly, because the center is pulled harder toward the earth is there a bulge in center and because the sides pull is weaker they should be closer to the bottom? Shortly, the stronger the pull the greater the bulge?

Kinda. The farther something is away from the core, the greater the angle that the water is pulled, which means that even if it is in a flat container, it is going to move along it and create a bulge at the point that is closest to the Earth. Consider this.

You know, if you attribute this to the force which pulls then it's just absurd.

Quote from: EnglshGentleman on October 15, 2010, 12:04:57 AM

Quote from: zork on October 14, 2010, 11:34:40 PM

Quote from: EnglshGentleman on October 14, 2010, 11:01:13 PM

In water slab A, the middle of it is the closest to the Earth, which means that the middle part of it is going to have the greatest gravitational pull on it. The edges that are farther from the core are going to be less affected by gravity. Because of this, the water is going to be pulled slightly towards the center creating a bulge.

Do I understand you correctly, because the center is pulled harder toward the earth is there a bulge in center and because the sides pull is weaker they should be closer to the bottom? Shortly, the stronger the pull the greater the bulge?

Kinda. The farther something is away from the core, the greater the angle that the water is pulled, which means that even if it is in a flat container, it is going to move along it and create a bulge at the point that is closest to the Earth. Consider this.

You know, if you attribute this to the force which pulls then it's just absurd.

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Consider this. If you had a extremely strong magnetic, and there was a container above it that had magnetic material in it. Is the material going to be pull down uniformily like on the left, or will it we pulled towards the center like on the right?

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Take some cloth and pull it stronger from one place and see what happens.

For all those still failing to understand that the surface of a liquid follows the form of the earth, please read the Bedford Level Experiment.

http://en.wikipedia.org/wiki/Bedford_Level_experiment

EG's summary of all the times I have had to say this, just shows what a startling lack of understanding there is for RE physics.

 It's not so easy.

Surface tension force wants to make the water curl up into a spherical ball; gravitational force wants to flatten the water out into a pancake. If gravitational force wins this game of tug-of-war, then you see a flat surface with surface tension relegated to a consolation prize of exhibiting only a little curvature next to the edges where the water contacts the glass. If you reduce the effect of gravity, surface tension wins and you see a highly curved, near-hemispherical surface.

There are several ways to rig this contest. Gravitational force works best over large dimensions so by making the free surface large, you ensure that gravity dominates and you have a flat surface. Surface tension works best over small dimensions so by shrinking the glass to smaller diameters, you will see the surface change from flat to highly curved.

Quote from: EnglshGentleman on October 15, 2010, 12:16:30 AM

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Take some cloth and pull it stronger from one place and see what happens.

That isn't what we have here. You would have to put the cloth on a table that has a small hole in it. The hole would be small enough for strings to pass through, but not the cloth itself. The strings at the most distant parts of the cloth would be longer than the one in the middle. All of the strings however, are long enough to reach your hand underneath the table. Pull the strings. Guess what happens? The cloth will bunch up towards the center.

Quote from: zork on October 15, 2010, 12:19:06 AM

Quote from: EnglshGentleman on October 15, 2010, 12:16:30 AM

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Take some cloth and pull it stronger from one place and see what happens.

That isn't what we have here. You would have to put the cloth on a table that has a small hole in it. The hole would be small enough for strings to pass through, but not the cloth itself. The strings at the most distant parts of the cloth would be longer than the one in the middle. All of the strings however, are long enough to reach your hand underneath the table. Pull the strings. Guess what happens? The cloth will bunch up towards the center.

And no bulge in the center. They all come towards the direction you pull. No part moves away from you.

Quote from: EnglshGentleman on October 15, 2010, 02:10:08 AM

Quote from: zork on October 15, 2010, 12:19:06 AM

Quote from: EnglshGentleman on October 15, 2010, 12:16:30 AM

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Take some cloth and pull it stronger from one place and see what happens.

That isn't what we have here. You would have to put the cloth on a table that has a small hole in it. The hole would be small enough for strings to pass through, but not the cloth itself. The strings at the most distant parts of the cloth would be longer than the one in the middle. All of the strings however, are long enough to reach your hand underneath the table. Pull the strings. Guess what happens? The cloth will bunch up towards the center.

And no bulge in the center. They all come towards the direction you pull. No part moves away from you.

It will buldge in the center.

Also, do read up on surface tension. It's really sad Thork and I must teach you this.

If no force acts normal to a tensioned surface, the surface must remain flat. But if the pressure on one side of the surface differs from pressure on the other side, the pressure difference times surface area results in a normal force. In order for the surface tension forces to cancel the force due to pressure, the surface must be curved.

You hear that? If there is unequal force on all parts of the liquid, it is going to have curvature.

Your own RE science is against you. Stop making yourself look silly.

It will buldge in the center.

No, it won't. If you pull the string which connects the middle of the cloth then the cloth moves toward you. Not away from you. If you see some bulge there then its because you don't have string in every point of the cloth.

Also, do read up on surface tension. It's really sad Thork and I must teach you this.

Quote from: http://en.wikipedia.org/wiki/Surface_tension#Surface_curvature_and_pressure

If no force acts normal to a tensioned surface, the surface must remain flat. But if the pressure on one side of the surface differs from pressure on the other side, the pressure difference times surface area results in a normal force. In order for the surface tension forces to cancel the force due to pressure, the surface must be curved.

It's really sad went you take some arbitrary part of article and quote it as your argument without even understanding about what it talks. Really sad.

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

It will buldge in the center.

No, it won't. If you pull the string which connects the middle of the cloth then the cloth moves toward you. Not away from you. If you see some bulge there then its because you don't have string in every point of the cloth.

The cloth will bunch up at the hole where the strings are getting pulled through, just like water will build up where gravity is strongest. Your really thick, aren't you?

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

Also, do read up on surface tension. It's really sad Thork and I must teach you this.

Quote from: http://en.wikipedia.org/wiki/Surface_tension#Surface_curvature_and_pressure

If no force acts normal to a tensioned surface, the surface must remain flat. But if the pressure on one side of the surface differs from pressure on the other side, the pressure difference times surface area results in a normal force. In order for the surface tension forces to cancel the force due to pressure, the surface must be curved.

It's really sad went you take some arbitrary part of article and quote it as your argument without even understanding about what it talks. Really sad.

It is sad that you don't see how it relates. Then again, you are either trolling, or have no clue what is going on right now so I am not surprised.

Quote from: zork on October 15, 2010, 02:45:47 AM

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

It will buldge in the center.

No, it won't. If you pull the string which connects the middle of the cloth then the cloth moves toward you. Not away from you. If you see some bulge there then its because you don't have string in every point of the cloth.

The cloth will bunch up at the hole where the strings are getting pulled through, just like water will build up where gravity is strongest. Your really thick, aren't you?

You really don't get the simple thing, when you pull then it comes to you. If the pull is stronger you get concave water, not bulged water. Is it really so hard to understand? And for the remark, in that context you didn't say anything yet about surface tension, so it's a talk purely about pulling force.

Quote from: zork on October 15, 2010, 02:45:47 AM

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

Also, do read up on surface tension. It's really sad Thork and I must teach you this.

Quote from: http://en.wikipedia.org/wiki/Surface_tension#Surface_curvature_and_pressure

If no force acts normal to a tensioned surface, the surface must remain flat. But if the pressure on one side of the surface differs from pressure on the other side, the pressure difference times surface area results in a normal force. In order for the surface tension forces to cancel the force due to pressure, the surface must be curved.

It's really sad went you take some arbitrary part of article and quote it as your argument without even understanding about what it talks. Really sad.

It is sad that you don't see how it relates. Then again, you are either trolling, or have no clue what is going on right now so I am not surprised.

Good. You just claimed that you understand that part of article. Please show now how it applies to the large area of water where the bottom is flat. Take account the gravity, the force which the bottom applies, surface tension, the fact that the surface are is large and explain what is this pressure mentioned in that section.

Quote from: zork on October 15, 2010, 02:16:41 AM

Quote from: EnglshGentleman on October 15, 2010, 02:10:08 AM

Quote from: zork on October 15, 2010, 12:19:06 AM

Quote from: EnglshGentleman on October 15, 2010, 12:16:30 AM

How so? Obviously, the picture won't be exactly accurate as the contain was larger than the other, and I'm only using paint, but otherwise, how so?

Take some cloth and pull it stronger from one place and see what happens.

That isn't what we have here. You would have to put the cloth on a table that has a small hole in it. The hole would be small enough for strings to pass through, but not the cloth itself. The strings at the most distant parts of the cloth would be longer than the one in the middle. All of the strings however, are long enough to reach your hand underneath the table. Pull the strings. Guess what happens? The cloth will bunch up towards the center.

And no bulge in the center. They all come towards the direction you pull. No part moves away from you.

It will buldge in the center.

Also, do read up on surface tension. It's really sad Thork and I must teach you this.

Quote from: http://en.wikipedia.org/wiki/Surface_tension#Surface_curvature_and_pressure

If no force acts normal to a tensioned surface, the surface must remain flat. But if the pressure on one side of the surface differs from pressure on the other side, the pressure difference times surface area results in a normal force. In order for the surface tension forces to cancel the force due to pressure, the surface must be curved.

You hear that? If there is unequal force on all parts of the liquid, it is going to have curvature.

Your own RE science is against you. Stop making yourself look silly.

When you are standing still you are resisting gravity. Does your head bulge to the force or gravity? No. The tank would offer resistance that would result in very flat glass. Above a guy called "machineman" or something posted a link to a websight about flat glass. It is NOT perfectly flat, the OP stated it isn't perfect, just close.

This is really easy, guys...

Thork, a self-acknowledged troll, is just using bad math and semantics to start a needless debate. I suggest that you respond accordingly to Thork in the future.

Here's his mistake this time. He uses marketing hyperbole instead of engineering specifications. He did the math horribly wrong, not understanding the basics of geometry. He then forgets that a pane of glass is more flexible than the effect he says doesn't exist. (His error is greater than his signal.) Overall, it's a horrible job, even for him.

For all those still failing to understand that the surface of a liquid follows the form of the earth, please read the Bedford Level Experiment.

http://en.wikipedia.org/wiki/Bedford_Level_experiment

EG's summary of all the times I have had to say this, just shows what a startling lack of understanding there is for RE physics.

From the same article on wikipedia

Rowbotham repeated his experiments several times over the years but his claims received little attention until, in 1870, a supporter by the name of John Hampden offered a wager that he could show, by repeating Rowbotham's experiment, that the earth was flat. The noted naturalist and qualified surveyor Alfred Russel Wallace accepted the wager. Wallace, by virtue of his surveyor's training and knowledge of physics, avoided the errors of the preceding experiments and won the bet.[4][5] The crucial step was to set a sight line 4 metres (13 ft) above the water.[6] Despite Hampden initially refusing to accept the demonstration, Wallace was awarded the bet by the referee, editor of The Field sports magazine. Hampden subsequently published a pamphlet alleging that Wallace had cheated and sued for his money. Several protracted court cases ensued, with the result that Hampden was imprisoned for libel and threatening to kill Wallace.[7][8] Wallace, who had been unaware of Rowbotham's earlier experiments, was criticized by his peers for "his 'injudicious' involvement in a bet to 'decide' the most fundamental and established of scientific facts".

Berny
Spends too much time on wikipedia

Quote from: EnglshGentleman on October 15, 2010, 03:14:35 AM

Quote from: zork on October 15, 2010, 02:45:47 AM

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

It will buldge in the center.

No, it won't. If you pull the string which connects the middle of the cloth then the cloth moves toward you. Not away from you. If you see some bulge there then its because you don't have string in every point of the cloth.

The cloth will bunch up at the hole where the strings are getting pulled through, just like water will build up where gravity is strongest. Your really thick, aren't you?

You really don't get the simple thing, when you pull then it comes to you. If the pull is stronger you get concave water, not bulged water.

What are you even debating now? Semantics? Now you are admitting that the water would be concave. If it is concave, there is curvature. If there is curvature, it is not perfectly flat glass.

Quote from: zork on October 15, 2010, 03:38:44 AM

Quote from: EnglshGentleman on October 15, 2010, 03:14:35 AM

Quote from: zork on October 15, 2010, 02:45:47 AM

Quote from: EnglshGentleman on October 15, 2010, 02:21:53 AM

It will buldge in the center.

No, it won't. If you pull the string which connects the middle of the cloth then the cloth moves toward you. Not away from you. If you see some bulge there then its because you don't have string in every point of the cloth.

The cloth will bunch up at the hole where the strings are getting pulled through, just like water will build up where gravity is strongest. Your really thick, aren't you?

You really don't get the simple thing, when you pull then it comes to you. If the pull is stronger you get concave water, not bulged water.

What are you even debating now? Semantics? Now you are admitting that the water would be concave. If it is concave, there is curvature. If there is curvature, it is not perfectly flat glass.

That's right it's not perfectly flat glass. The marketing literature lies, and probably meant flat since glass bows easily. Now do you understand? Can we get on to a meaningful debate, please?

Good. You just claimed that you understand that part of article. Please show now how it applies to the large area of water where the bottom is flat. Take account the gravity, the force which the bottom applies, surface tension, the fact that the surface are is large and explain what is this pressure mentioned in that section.

Define large area of water. Earlier in this thork demonstrated that even a 6m sheet of glass would have detectable curvature. If it is a small body of liquid, there is going to be a lot of curvature. Even with larger amounts of liquid (the ocean) the effect is smaller, but not non-existent. If this weren't true, than there wouldn't be any curvature to the oceans. If there wasn't any curvature in the oceans, it would seem you would have to take the FE'ers side and explain how boats passing over the horizon works.

That's right it's not perfectly flat glass. The marketing literature lies, and probably meant flat since glass bows easily. Now do you understand? Can we get on to a meaningful debate, please?

Oh, how hypocritical. FE'ers are criticized for invoking the conspiracy to say something is false, but then RE'ers go and do it.

Quote from: ClockTower on October 15, 2010, 07:36:11 AM

That's right it's not perfectly flat glass. The marketing literature lies, and probably meant flat since glass bows easily. Now do you understand? Can we get on to a meaningful debate, please?

Oh, how hypocritical. FE'ers are criticized for invoking the conspiracy to say something is false, but then RE'ers go and do it.

Really? A marketing ad that exaggerates in your mind constitutes a conspiracy? How narrow-minded of you.

Quote from: EnglshGentleman on October 15, 2010, 07:36:44 AM

Quote from: ClockTower on October 15, 2010, 07:36:11 AM

That's right it's not perfectly flat glass. The marketing literature lies, and probably meant flat since glass bows easily. Now do you understand? Can we get on to a meaningful debate, please?

Oh, how hypocritical. FE'ers are criticized for invoking the conspiracy to say something is false, but then RE'ers go and do it.

Really? A marketing ad that exaggerates in your mind constitutes a conspiracy? How narrow-minded of you.

You have no proof it is exaggerating. Rather, you are assuming it is in an attempt to dismiss it.

Quote from: ClockTower on October 15, 2010, 07:40:06 AM

Quote from: EnglshGentleman on October 15, 2010, 07:36:44 AM

Quote from: ClockTower on October 15, 2010, 07:36:11 AM

That's right it's not perfectly flat glass. The marketing literature lies, and probably meant flat since glass bows easily. Now do you understand? Can we get on to a meaningful debate, please?

Oh, how hypocritical. FE'ers are criticized for invoking the conspiracy to say something is false, but then RE'ers go and do it.

Really? A marketing ad that exaggerates in your mind constitutes a conspiracy? How narrow-minded of you.

You have no proof it is exaggerating. Rather, you are assuming it is in an attempt to dismiss it.

Wrong. I've already presented the evidence (and enough for me to even call it a proof) in this very thread. I corrected the troll's math and shown that glass bows by more than the curvature of the Earth with a solid citation. Do pay attention.