Glass Definition and 658 Threads

HI guys. I am facing a problem that is quite interesting but quite complicated to explain. so would like to ask some help. the problem is talking about the boucebackability of three different balls. Tennis ball , glass ball and rubber ball. there is one little boy claims that the glass ball...

What temperature does stone have to reach for it to turn into refractive glass?

We'd put this glass into cabinet. 1 day we suddenly heard a loud noise and then find the glass while it was smashed into tiny pieces. Any idea what's happened? I thought resonance caused that! :shy:

Just for fun, I used to play around with liquids, and I noticed something odd. In an uncovered tall glass container, ~20 fl.oz., I made an emulsion of water and olive oil by mixing and blowing bubbles with a straw. (Go ahead, laugh.) I let this sit undisturbed on a window sill for a while and...

A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bans of red and dark are observed. What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact.

Hi, I have been looking at some discussion questions in a textbook and there is a question about blood transfusion from inverted glass bottle rather than a flexible bag. The question" What would happen if blood were transfused from an inverted glass bottle rather than a flexible bag? I...

Some help with this question please? a) An ice cube floats in a glass of water. When the ice melts, will the water level in the glass rise, fall, or remain unchanged? Justify your answer. b) If the ice had been made from pure water, and the water in the glass was salt water (denser than...

What is so special about a glass prism that a beam of light disperses after passing through it but not an ordinary cuboidal glass prism?

When we put a coin on a boardcard and both the boardcard and coin put on a glass. when we hit the boardcard,why the coin drop down into the glass.??

A 16 oz drinking glass half full of water shatters without any apparent help. The result is a mound of finely ground glass arranged neatly in a circle equal to the original circumference of the bottom of the drinking glass. Can physics explain how this happened? (No physics background here.)...

i can't figure this out. i hope someone here can. heres the scenario: the dishwasher was run the night before, and my sister emptied it at around 10 am. there are 2 sizes of the particular cups we are talking about here. she thinks she had stacked 2 big ones together, but there was a chance it...

I just saw an episode of Mythbusters where a guy succeeded in shattering a crystal glass with his unamplified voice. This guy tried on about twenty different glasses held directly in front of his mouth. Finally one shattered. They had him clocked at 550hz at 105 decibels when it finally...

Ok i don't know if this goes here or not but please let me know. Ok is it possible to have glass that has the strenght of steel but is still clear as in it's orginal state. Is this a possiblity? If so what is the cemical comp, i would like to know becase i am writing a book and would like to...

I saw CSI today and a glass was broken on the crime scene and furensics took one sample fracture from there and did one experiment in the laboratory also. (experimentor broke a window (glass) with baseball bat). And then they analysed those 2 fractures(one from scene and one from lab) and...

Do photons in the form of visible light actually pass through ordinary window glass? I ask because window glass is assumed to be opaque to photons in the form of infrared energy. The IR photons are accepted on one side of the glass, conduct through the body of the glass in the form of heat...

I am currently working on a research project aimed at explaining hardness variation of glasses with applied load (indentation size effect) and loading time (hardness creep). I am using the Vickers Hardness scale. My question (that hopefully someone here can answer) is what factors and...

Why doesn't it matter how far you keep an object when you are finding the displacement by the glass block

Glass-iron fibres could a magnetic field effect it? Hi, didn't know where to post this but basically if we were to have fibres made of a mixture of glass and Iron could an application of a magnetic field be used to apply a strain? What factors would need to be considered? Thanks

Hi, I generally understand interference and Newton's ring/Young's double slit experiments, but I can't find the answer to a pretty simple question: When two glass plates are placed together and their is a gap of thickness "t", contructive and destructive interference leads to interference...

why does the sound in a glass chnage as your fill it up with water? Hey everyone, does anyone know why the sound changes in a glass as you fill it up with water? I think it has something to do with resonance

Does anybody know the typical natural frequency of an empty wine glass? I want to conduct a demo experiment of breaking a wine glass with a sound wave from a distance. Has anyone here done it before? I need a signal generator (sine wave) and an amplifier. What kind of loudspeaker do I have...

Hi, could someone please help me get started on this problem. The figure is a right angle triangle with 30-60-90 degree angles (right angle). Can you help, please. Thank you so much. The glass prism shown has an index of re- fraction that depends on the wavelength of the light that enters...

Glass lenses behave in the way it is expected to behave when the medium they are in is a vacuum or air. But if the medium is also glass it obviously doesn’t work as a lens. If the density of the medium is higher than that of glass the lens works in the opposite way. The power of a lens...

My proffesor assigned the question to the class. Will an hourglass filled with sand weigh any different if you tip over (i.e. the sand is on the top falling down vs. the sand is on the bottom not moving) If the sand is on the top. a few grains of sand will be in free fall (these would be...

Hi, I am trying to prove algebraically that light cannot pass across the corner of a right-angled block of glass of refractive index n=1.5. Would someone be willing to let me know whether the method I have used below is valid or not? 'i1' denotes the angle of incidence that the light ray...

http://www.newscientist.com/channel/mech-tech/mg18624931.000

Someone in a physics class here proposed, a white light beam going through a meter worth of glass and because different frequences refract at different angles, a 1 cm rainbow would come out the other end. The only way I see this to be possible is for the beam to be infinetely thin. I mean REALLY...

I was recenlty on the phone with my friend who moved into a new house. The house has been around for a little while...nothing too long. He was on the phone when his mom told him to hang up and look at this. As it turned out, a pane of glass in the bathroom shattered. He looked at it and watched...

Hello, I have a question on resonant frequencies. Everyone knows the example of breaking a wine glass by singing an extended note at the resonant frequency of that glass. My question is: Can other objects be "broken" by this same process? For example, is it possible to produce the...

How can I determine the speed of light from a glass plate? I have the the numbers that I compared the average experimental value of the index of refraction with the general range of the index of refraction of glass.

This question bothered me for some time. From what i have seen in textbooks, dispersion occurs as soon as white light passes from air into a glass prism, but why not for a glass block, assuming that the angle of incidence is the same? The standard answer for why dispersion happens in glass...

High...I'm a hardy Minnesotan which also means I go through some harsh winters. The ice on my car always freezes pretty thick at school. That being said, I want to invent some sort of cool-looking low-heat flame device to basicaly melt the ice very very fast. So I was wondering: 1. What...

Some people must get to write books simply because someone owes them a favor. I'm pretty sure if I went to a publisher and said, "I'm writting a book about high level math, without resorting to actually using math, for people who aren't all that interested in math." My publisher would place it...

Let's say we have an objet O in front on a glass bead. The first surface will be a convex surface, hence the centre of curvature is in the back of the surface, which gives +R_1. The object, is a real object in front of the surface, which makes it +p_1, however for the second refraction, we take...

if you dropped a steel marble onto a steel plate and then dropped a steel marble onto a glass plate which would you expect to bounce higher?

which collision of marbles is more elastic, steel on steel or steel on glass?

Hi to everyone, I'm new here and this is my first post. I have been reading por a couple of days without nothing to ask/say but I have just remembered an e-mail that a friend sent me a last week. In her mail, I don't paste it because it's written in spanish, she wants me to explain, using my...

A painter has a gallon tin (eight pints) full of yellow paint and another gallon tin half full of blue paint. He wants to mix the paints together so he can paint a room green. He reckons he will need at least 10 pints of paint to cover the walls. Unfortunately, he doesn't have a mixing vessel...

Hi all, I've this question and I don't know how to go about... can somebody pls assist? thanks question: a cylinder of glass 1cm long has a resistivity of 10E12 ohm meter. how long would a copper wire of the same cross sectional areqa need to be to have the same resistance as the glass...

Is it wrong to use a thermocouple to mesure the temperature of glass that will range from 20-300oC? as the range of the thermocouple is much higher, does this make it inaccurate? :confused:

In nearly every physics textbook I've encountered, it is always claimed in the optics section of the textbook that light travels slower through glass, water, diamond, etc. The speed of light in vacuum is divided by the material's index of refraction in order to calculate the "new speed" through...

I remember learning that in mixtures if the particles were small enough light would go through and make it trasparent, my question is how/does this relates to things like glass or trasparent plastic? What at the molecular level makes something transparent?

well, I am sure most of the readers of this forum would agree with me that glass in not a liquid. for the ones who don't -> solids used to be defined as highly organized crystals. since glass is not a highly organized crystal it has been referred to being a supercooled liquid that is still...

Hi, In our class, we were asked whether it's practical to use a magnifying glass to focus sunlight to burn wood. One question really bothers me. Could somebody please explain to me how the focal ratio (focal length of converging lens divided by its diameter) affects the temperature of the...

Hi, In our class, we were asked whether it's practical to use a magnifying glass to focus sunlight to burn wood. One question really bothers me. Could somebody please explain to me how the focal ratio (focal length of converging lens divided by its diameter) affects the temperature of the...

Hello, I was wondering if anyone could tell me the young's modulus of: Graphite, Wood, Steel, Glass, Titanium, and Aluminium... I know this is a strange thing to ask, but it would really help me understand more fully the way Graphite compares with other materials. Search engines...

hey guys i found this little bit of info about glass and i was wondering if it is true or not. the statement was: So is this true? and if it is can some one please explain it to me. Thanks allot Pinky

It may seem like an odd question, but why is glass see-through? What properties of glass (and indeed light) make it possible for us to see through glass? Has anyone else ever wondered this? Thanx

I have never really thought about so any help would be great.

A glass marble is dropped down an elevator shaft and hits a thick glass plate on top of an elevatior that is descending at a speed of 2.0 m/s. The marble hits the glass plate 3.0 m below the point from which it was dropped. If the collision is elastic how high will the marble rise, relative to...