Is there anyone logged on whos an expert at physics or frequency stuff?

Maybe you could tell us a little more?

This has absolutely nothing to do with heat and cold meeting.
Tonight, a glass of lukewarm milk the kids left on the table exploded. No one was in the kitchen, it was not the kids. I have picture of it up at
www://opalbeads.com/pics/bizarre.JPG
All the glass is crazed beyond belief, it looks like ice. There is nothing to explain it that I can figure except possibly sound frequency manipulation. Searching for that on the internet led me here I found nothing. I recall reading something about weapons being developed (and also available to idiots to build from web plans) using low frequency similar to earthquake style, to cause damage both in people's health, and such as this. Does any one have a clue about frequency Im talking about, or an alternative of how on earth a glass can shatter (explode!) for no reason? It was relatively new, about a year old and not cracked.
Thanks

http://www.opalbeads.com/pics/bizarre.JPG

It exploded into well over 100 pieces, with a very loud glass shattering sound, similar to if youve ever put corningware on a burner by mistake, minus the heat.
:)
Im new to this site and dont know how to use a chat function.

I doubt that it was sound. You probably would have been able to hear the resonate frequency of the glass, and it would have to have been very loud to shatter the cup. My guess is that something flew into it. Not that I really have any idea what the circumstances were.

I was sitting at my computer, which is outside the doorway of the kitchen. No one was in the kitchen. My two youngsters were watching TV in their room behind me. When it crashed that sound, I saw both of them in their room, there is no explanation I can find.

As you can imagine, my brain will not settle down until I can explain how the glass exploded with lukewarm milk I meant to discard last time I passed it. Any clues at all?

The entire bottom of this thick glass, looks like ice. I thought at first when I saw it, it was ice, but we dont make ice in my house. It looks exactly like ice, all whitish, crazing throughout, even crazed on one thin side piece, Im talking 100+ pieces, please look at the photo I took to show my family this evening.

the thick part of the bottom of the glass, looks similar to when a windshield breaks in an accident, in tiny squares. It looks like rocksalt and falls apart when you pick it up.

Dear Nasor,
Do you know and would you tell me, the name of the science Im talking about with frequency usage? Something like Frequency Manipulation, Modification, Modulation (but I know thats just FM) if you would be so kind, so I can do some researching on the net.
Thanks

Your cup was evidentially made of safety glass. It has a very thin laminate coating on its surface that holds the small glass pieces together when the glass breaks. It's a safety feature that keeps bits of glass from going everywhere. Well, it keeps even more bits of glass from going everywhere. It doesn't work perfectly. They use the same treatment on many windows and all car windshields. That's what causes the icy, cob-web type pattern.

No idea why it broke, though.

I wasnt aware normal drinking glasses are made of safety glass. I dont see any coating on it but I will munch on that idea tonight. Thanks Nasor

If you want to know about breaking things with sound I would search for 'resonate frequencies' on a search engine.

I doubt that any sort of sound-related phenomena caused your glass to break. I wouldn't worry about vandals with sonic vibrators.

If you're really curious, break another of the same kind of glass. You should get the same pattern.

Thanks again Nasor, I will look that up.
I live near an army base where the fastmovers leave from, they are always doing somekind of underground explosion tests, however none tonight. If this happened to you, sitting 3 feet from the doorway, youd be quite interested as I am. My IQ is 180 tho I didnt go to college, but I know something is kind of strange here and I am not the kind to dismiss anything like this and go sleep well. :)
Totally bizarre. Have a good night.

Scientifically speaking, thats a good idea. However, with a 6 year old, we have already broken these type glasses, and they break in a few pieces, nothing like this. Its totally perplexxing.
Theres got to be some explanation, maybe someone will see this post and I will check it all week in that hope. Thanks

Someone in my family suggested that the heat of the dishwasher may have "tempered" the glass, and that tempered glass might break in that fashion. Why it would decide to explode like it did for no apparent aggravative reason is what Im wondering.

Well, I found a snippet with other terminology and will use that to research further. Thanks
//Another promising technology is high-powered acoustic generators that are used to produce infrasound (below 20 hertz and inaudible). This low-frequency, high-decibel sound is emitted in bands that resonate in certain body cavities, causing the disturbance of body organs, visual blurring, and nausea. These effects, becoming more severe as the decibel level increases, range from temporary discomfort that disappears after a few minutes to permanent damage or lethality. Additional antimaterial effects include the embrittlement or fatigue of metals, thermal damage, and the delamination of composites.5//
http://www.airpower.maxwell.af.mil/airchronicles/apj/apj94/dil.html

Most likely internal stresses in the glass. This apparently happens quite often. I have seem similar threads on this subject on other science fora.

http://www.cmog.org/page.cfm?page=281

Dear Boris
Thank you for showing that link. I went and read it and have a question.
The link is about how internal stresses are created when molten glass is cooled quickly in ice water, purposefully to create surface tension differences. Can internal stresses like that take place after a glass object is formed and already solid/cooled? Such as from a dishwasher's heat? The article says the stress is formed by the ice-toughened skin around the hot center glass molten, creating a tension strong enough to cause it to explode upon receiving a scratch. But there is no toughen-able skin on a factory made glass, at least I dont see how a molecular change can take place AFTER the molten stage without the foregoing being copied to the same affect DURING the manufacture, dishwashers dont get THAT hot. What do you think? (I always hated physics as its so illogical) Thanks for any basic physics common sense you can offer. The glass is so shattered on the thick base, it looks white like rock candy.

One more afterthought - could the acid in milk eat away subtly enough in a standing glass to deepen an existing scratch? I find that kinda far fetched, as glasses dont tend to get scratched on their insides, but am trying to figure out how it exploded with nothing touching it, not being handled, etc., stationary for hours. Thanks

From what I can gather from other answers on other fora the stresses are in the glass from manufacture. In most cases this is no problem. In the few other cases scratches from use excerberate(sp) these defects and the glass shatters. I don't think the glass has to be toughened or have other special treatment for this to occur.

When you think of the millions of glasses made it is a wonder that it is not a more common occurance.

Why it shattered at that time...well it was most likely going to shatter at some time and that was it.

Ur probably haunted. looks to me like the devil himself is in your house :D lol. Im only joking. Who knows. MAybe it was vibrations. Maybe a plane flying overhead causing the table/worktop to shake slightly but so little that u couldnt hear it. Plus if u were on the computer u would bve concentrating on something else. Table shakes ever so slightly, glass begins to move and eventually drops off end. Glass is safety glss (IMO).

haunted milk?

..Did an object thet struck this glass come?,if it was hit from the left,it would fall to the left,was there an open window without a screen nearby,It looks like it was hit near the base with a BB gun,there may be a hole in your screen you haven't noticed yet,but if the windows were closed that would be improbable,did you find anything on the floor in the room later on that you couldn't account for?.

from what i know, thers only one acid capable of etching glass. thats hydrofluric acid, which is considerably stronger than milk :)

an udderly frightful experience.

Originally posted by On Radioactive Waves
from what i know, thers only one acid capable of etching glass. thats hydrofluric acid, which is considerably stronger than milk :)
are you crazy? nobody knows the limitations of haunted milk! Haunted milk just may be the beginning of the end---for all of us! Wise-up and beware! From now on, it's black coffee for me...

ha ha... *pokes Unbalanced* stop with the puns....yer killing me!!:mad: :D



but, here's my 2 cents worth...ahem...i'd say that the glass had had fissures and cracks that weren't visible to the human eye. and, these fissures finally lost/broke their covalent bonds and, ...well, the rest is history.

...as if my "Haunted Milk Theory" isn't viable...

Airdog, i'd say it's about as viable as the next guy's theory....:D

This reminds me of when I was in high school. My mom was cleaning a pane of glass that went into the glass coffee table. My mom was just holding the pane, when it shattered into hundreds of pieces. Because the glass was tempered, it shattered into a bunch of tiny pieces each about a half centimeter in length. We asked my Grandpa (who used to work as a glazer) if this was common. He responded by saying that it happens quite often.

As far the thoery of tempering through dishwashing, this can not happen. Tempering can only occur at temperatures on the order of 1000 F. :eek: Certainly higher than the temperatures found in your dishwasher or even your kitchen oven.

The reason the temperature needs to be so high, is that there needs to be enough energy to cause the molecules within the glass the rearrange themselves and create new bonds. When the glass is quenched, this effectively "freezes" the atoms in this higher energy state. The glass as a result is harder and stronger. But on the other hand, the glass becomes more brittle.

Anyway, here's a website I found that talks about tempering glass.

http://www.alumaxbath.com/tech/tgp.htm

Inclusions in glass originate from impurities in th batch or cullet, or are combined from furnace refactories. Common forms of inclusions include aluminous stones, iron stones, and silicon. Nickel sulfide stones are uncommon, microscopic defects in glass, and may cause breakage. Delayed breakage may occur when a nickel sulfide stone is present near the center of the glass thickness.

The tempering process rarely introduces imperfections into glass. The basic glass may contain bubbles, vents, chips, and inclusions which, if accepted or not revealed by inspection before tempering can cause breakage in the initial heating or final quench operations. If inclusions are not eliminated by self destruction during the tempering process, in rare cases they may lead to failure at a later time.

sounds like.........
an udderly frightful experience.
*shakes head and puts hand over face* Oh dear!! :rolleyes: In a room at school once a girl touched a window lightly with her hand and it cracked all the way up. Someone mentioned this earlier. If glass is cold enough to start with the heat from a hand is enough to cause it to crack. This doesnt seem relavent here though as no-one was near the glass of possessed milk. This theory could still be valid. Plus noones replied to my plane theory. In my opinion tiny vibrations caused the table to shake and so the glass fell off the end.Didnt have to be a place. Could have been a pneumatic drill round the corner. Anything. What is the excitement about the glass? Is it because its in little peices?? I think its safety glass.

Originally posted by Neville
*shakes head and puts hand over face* Oh dear!! :rolleyes: In a room at school once a girl touched a window lightly with her hand and it cracked all the way up. Someone mentioned this earlier. If glass is cold enough to start with the heat from a hand is enough to cause it to crack. This doesnt seem relavent here though as no-one was near the glass of possessed milk. This theory could still be valid. Plus noones replied to my plane theory. In my opinion tiny vibrations caused the table to shake and so the glass fell off the end.Didnt have to be a place. Could have been a pneumatic drill round the corner. Anything. What is the excitement about the glass? Is it because its in little peices?? I think its safety glass.

Bringing up temperature change is an interesting subject. The reasons materials fail under fatigue is that the change in stresses eventually causes microcracks in the material to grow and fail. As we all know, changes in temperatures create strains in the material which could cause crack growth. So the glass will go through many temperature cycles (cold milk to hot dishwater) until the material fatigues and eventually shatters. So perhaps the cold milk in the glass was the last fatigue cycle.

As far as your plane theory, it seems implausible. The orignal poster can tell us if the glass was found on the floor or on the table. However, it seems to me that the frequency that could be transmitted to the table from an airplane would have to be low frequency. And it also seems that one would need a higher frequency to cause the table to vibrate enough to move the table.

i just think that the all the glass's molecule's covalent bonds broke. snapped. ka-put.

Originally posted by pumpkinsaren'torange
i just think that the all the glass's molecule's covalent bonds broke. snapped. ka-put.

But why?

There has to be a catalyst to break those bonds, doesn't there?

bottom line: the amount of stress received caused it to break. as redundant as this may sound, the "tensile" strength wasn't strong enough, essentialy. stress=units of force divided by area.

Originally posted by pumpkinsaren'torange
bottom line: the amount of stress received caused it to break. as redundant as this may sound, the "tensile" strength wasn't strong enough, essentialy. stress=units of force divided by area.

That's kind of obvious though, isn't it? I mean, pretty much everything that fails by fracture, the stress was too high.

Do you think the high stress was a singular event, or perhaps an event over time such as slow crack growth due to fatigue?

:rolleyes: :D

good lord...i think, just like everthing else in this life, those poor ol' covalent bonds got plum wore out! :D

yeah, the pressure of the milk inside the glass probably caught those covalent bonds right at their weakest-linkage( :D) ) the milk was definitely in the right place at the right time, that is, if indeed that is what the milk was planning and hoping for. but, heh....who the heck knows what milk thinks these days! :bugeye:

i think the dishwasher could do it. i had a glass crack before just cooling from the heat of the dishwasher. this glass was about 15 years old, the bottom was pretty thick , about 3/4" and the sides were thin. it was an octagon that transformed into a circle at the top. bottom line, i think the different thickness caused stress when cooling, over many times in the dishwasher. the glass was not tempered and did not seem like it was very heat resistant.

somthing weird i've noticed: maybe the glass was just ready to go. i saw a tequilla bottle inplode from heat (torch) and it began to look very weird just before it imploded. the shape change and it almost looked loike a resonating mutation, until it could no longer handle the stress without fracturing and then imploded. this was a quervo 1800 bottle, not tempered, and took place at hot temperature ( bendable yet breakable)

also are you sure it was glass, and not crystal? that would make a difference. remember that glass is not a solid in the cystal sense but rather an amorphus solid

yep, there's a few things involved here that could have weakend its tensile strength. can we pin-point which variable/catalyst it actually was....i dunno. naw, now that i think about it..i think not.

well i'd say to have a guess based on more than mere speculation, you would first have to dertermine the composition of the glass

exactly.

hey! to whoever started this thread. we need the pieces of glass to examine! do you still have them. *drags out jr. detective lab kit* *puts on lab coat*

Art Bell just announced that his on final show he will be focusing exclusively on my "Haunted Milk Theory."

:D welp, that's art bell for ya!!

absolutely!

Yup.. think so too .. stress build up.. it may have been hit earlier on... it happens with windscreens quite often .. they break way ... way.. down the road after a stone hits them..

It IS the milk!
some cow huh dude! Can you imagine what would have happened if you would have drunk the milk?!
http://www.teamcoldfusion.nl/smilies/boos/splat.gif

some smilie, dude!!

http://www.data-techniques.net/cwm/otn/blobs/boldblue.gif

Common occurance with glass. What happens is that the glass was damaged in some way that started a hirline crack. This usually goes unnoticed. Run it throught the dishwasher and there is now more stress on the crack as the glass expands and contracts. The stress is now stronger and the glass is "primed" Drop the glass a little, handle it, or pur a cold liquid into it and the glass relieves the stress by shattering.
Think of it like a small rip on a taut nylon tarp or an earthquake that "just happens". It's energy for the shattering was put in there before the actual event.

NO,....:(

I still like the other possibilities more,...imagine: A haunted cow!:p


Okay okay,...:rolleyes:

Maybe somebody played the old memorex recording of the lady who sang at the frequency to shatter glass. It was their trademark and a forgery protection for awhile, because the other media types didn't have the quality to reproduce the resonance frequency of glass in such a way to shatter it.

!!! BB gun !!!

Ive done quite a bit of glass blowing in the past and let me tell you its a VERY hard and technical material to work with. To blow glass you must keep it within a certain temperature 1700-2000 degrees while you work with it. To do so you have to continuously place your piece in a red hot 2500 degree furnace called a glory hole. If you work with your piece too long outside the glory hole the glass will cool too quickly which will cause hundreds tof tiny stresses in the glass and will very quickly expload right before your eyes. (too much tension in the glass) After you are done blowing a cup for example you need to anneal it which means placing your hot newly blown cup into an oven at 1000 degrees that SLOWLY brings the temp down to a handleable 200 degrees over around 24 hours. This way the stresses are kept to a bare minimum but are still in the glass. If your glass cup wasnt kept at exactly the right temperatures throughout the entire process it can inevitably expload anytime (even years later) Ive had the same thing happen to my cups but they will usually expload weeks or months after completion not years, but its absolutly possible.

The reason it looked like ice is because the glass was tempered (explained in previous posts). It was NOT safety glass. (using a thin film) It is physically near impossible to create a cup shape with that technology.

I would call this event normal and it actually happens a lot. If its going to expload it will 99% of the time expload before it gets out of the factory. You had a very 'special' cup. Pretty damn strong for a weak glass.

If your glass cup wasnt kept at exactly the right temperatures throughout the entire process it can inevitably expload anytime (even years later)

Thank you for that enlightening explanation!;) So welcome to sciforums Bumpman! And happy posting!

I guess that will be it for this thread,....to bad for the haunted cow theory,...:rolleyes: hehehe:p I still don't get over that one wheeeheheeeLOL:p

Nader believes that safety issues like this should be backed by proper legislation.

Originally posted by ralph nader
Nader believes that safety issues like this should be backed by proper legislation.
This might sound silly, but I don't know what you mean by that?