Why can only certain frequencies only break a glass?
550519
It is about the frequency, not the amplitude. Any frequency below 20 000 Hertz is capable of shattering glass provided it's constant and from an uniform source and is properly directed onto a subject, which is glass in this case.
62361
Try it. CAUTION - KEEP LIQUIDS AWAY FROM ELECTRICAL CURRENT.\n\nSet up a loudspeaker next to a glass of water (a wine glass is good for this)\n\nWhat do you think will happen when you alter the sound from the speaker?\n\nInvestigate and observe.\nTry a thicker liquid such as milk.
541336
Just an hypothesis:\n\nIn round glasses, the water ripples caused by hitting the glass travel from the wall of the glass to the center and then back, and so on. Since the shape of the ripples stays the same when going inwards or inwards (circular) the waves can amplify themselves by adding up the energy (two waves can join in a larger wave) which enhances the vibration of the walls, hence you get a long sound. \nIn a square glass, the ripples departing from opposite walls will tend to cancel each other due to their opposite directions of movement. This would dim the sound.
1078588
yes the glass would break because unlike any other liquid water expands when frozen therefore the glass would break regardless of how full it is
338498
There are different types of glass, with different specific heat values.  Specific Heat is also called Heat Capacity.\n\nFlint Glass   0.503 Joules / gram Kelvin\nPyrex Glass   0.753 Joules / gram Kelvin
290962
All all of them bend, stretch and break. But glass has a very low capacity for bending, it is microscopical. Metal stretches, but it has a very low capacity and so on.
911903
Well, you could build a *relatively* simple circuit that simply cut the frequency in half, but then again, what kind of sensor are you dealing with?\n\nWhy do you want to tune it to a lower frequency? It is not simple to just shift a frequency, there are many things to take into account; input impedance, output impedance (both may be frequency dependent), signal amplitude, and required voltage swing.\nI would only attempt this if it was not a vital sensor I was messing with.
352065
some is reflected by the glass, and some passes straight through.  A tiny part will go towards heating up the glass itself, as it is absorbed during its transition throught the glass.
197818
some glass reacts to vibrations in a way to make it shatter. (even vibrations you can't feel or hear) Another reason could be that it was previously exposed to severe temperature changes and was not made of tempered glass. any additional temperature changes might be the straw that broke the camel's back and it just broke when the room temp changed by a few degrees
634947
Everything thing in world is made up of atoms. These atoms are associated with each others with the bonds. The atoms in a molecule may vibrate, may rotare about a particular axis or they may show the electronic transitions. This vibration of the atoms (i am talking about vibration, same is the case with rotation and electronic transitions) in the molecule take place at a particular frequency, not at all the frequencies. As an example, let me say that a particular atom vibrates at a frequency 1085 cm-1. so, whenver a light beam of this frequency will hit the molecule, the atoms in that molecule will vibrate, that is, that molecule will absorb that particular frequency. if a light beam other than this frequeny will hit the molecule, the molecule will not absorb that frequency and it will be called transparent to that frequency (because its not the nature of molecule to absorb that frequency). \nIn simple languauge, let me say like this. yu will be having only one best friend. y? because his/her frequency matches with yours. thats why he/she is yur best friend. you absorb at his/her frequeny. And you are transparent to the other people's frequencies, because they don't match up with your frequencies.
25439
There is some sort of a polymer that blocks 4 Ghz, which is WiFi, and yet allows other frequencies through. \nhttp://www.forcefieldwireless.com/windowshield.html\n\nHere is a company that makes glass that will block cell phone signal frequencies. They also sell the polymenrs with various blocking capacity. \nhttp://www.lessemf.com/plastic.html\n\nNice question. I won't have to smuggle that cell phone jammer back from Europe after all!!!
792079
I assume you mean the resonant frequency.\n\nThere is no resonant frequency for air, because air is not rigid. Sound resonance depends on the cavity that contains the air, such as an organ pipe.
776408
Hi Scarlett,\n\nFirst of all, visible light waves consist of a continuous range of wavelengths or frequencies. When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat; the light wave could be reflected by the object; and the light wave could be transmitted by the object. Rarely however does just a single frequency of light strike an object. While it does happen, it is more usual that light of many frequencies or even all frequencies are incident towards the surface of objects. When this occurs, objects have a tendency to selectively absorb, reflect or transmit light of certain frequencies. That is, one object might reflect green light while absorbing all other frequencies of visible light. Another object might selectively transmit blue light while absorbing all other frequencies of visible light. The manner in which visible light interacts with an object is dependent upon the frequency of the light and the nature of the atoms of the object.\n\n"White" or natural light is made up of different colours (as in a rainbow) and Isaac Newton showed that these could be shown by shining white light through a prism.\n\nWhat "colour" we see an object depends on what wavelength of light it does not absorb and that depends on what the chemistry of the object is. This is because the electrons in a substance will vibrate at a certain frequency depending on what the construction (i.e. what the chemistry) of the atom is. Accordingly this will either absorb (interfere) or coincide with the wavelength of a particular colour.\n\nThus we will always see different chemicals as different colours (ie. wavelengths).
983144
interior of cup expands faster than exterior of cup due to poor thermal conductivity of the cup material.\n\nglasses that are thin enough will not suffer this problem because heat can conduct thru thin materials easily so that thermal expansion is more or less equal on the interior and exterior.\n\nyou can also force one of your glasses to break by cooling the glass with ice water, dumping the ice water away and then dousing the glass with boiling water. try not to hurt yourself.\n\nbicycle tire ruptures due to a simpler explanation. the tire cannot withstand increased pressures that occur when a gas is heated in a closed system. (gay-lussac law)
526798
If your PCB has a hairline crack and conducting path is intermittent. A sound that is converted into a vibration can cause induced interference at the hairline crack.\n\nBut this is via a transducer (hairline crack), not directly from sound to electrical. This principle was used in the early days on the carbon microphone for the telephone mouth piece.
1053320
As frequency increases the wavelength decreases and the equipment needed to transmit a certain distance doesn't need to be as strong. This allows the same powered transmitter to transmit a longer distance. This is why radio frequencies can travel a long distance but the output of a loudspeaker cannot.\n\nI think that was the answer you were looking for, since attenuation would be device dependant.
960255
Tempering can cause glass to explode. Tempering means that there are internal stresses within the glass that result from uneven cooling from its molten state during the manufacturing process due to the glass's thermal expansion characteristics. This can occur due to carelessness or intentionally. So called "safety glass", like that used in autos, is intentionally tempered. If the glass is even slightly nicked, the tempering resulting is stress concentration that can cause a chain reaction releasing all the stress in the glass  in a great low energy "explosion" of glass pellets. The idea is that no one shard of broken glass is large enough to cause serious injury.