Becasue the glass either let the bullets through after multiple hits; or the glass shatterd on the other side causing injury to the person it is protecting.
Bulletproof glass is made by sandwiching multiple layers of materials, such as glass and polycarbonate, together. This combination of materials is designed to absorb and dissipate the energy from a bullet, preventing it from penetrating through the entire thickness of the glass. The specific construction of the glass allows it to deform and absorb the impact of the bullet, stopping it from passing through.
Glass is usually made shatter proof in order too prevent long sharp pieces of glass injuring people. This is done by either applying a clear sheet of plastic too the glass, or the glass sheet is heated till just below the softening point and then cold air is blasted onto the glass, this way when the glass breaks into small chunks which would explain why in some cases the bullet only punctured a hole instead of shattering the whole sheet of glass.
Yes and no. "Shatter proof" sliding glass doors are available at Home Depot. However, this is really a level of shatter resistance if you read the fine print. There are storm proofing systems that can be added to sliding glass doors to make them shatter resistant for winds up to 175 mph.
To create a bullet made of ice, water is frozen in a bullet-shaped mold. The mold is then placed in a freezer until the water solidifies into the shape of a bullet. The ice bullet can then be removed from the mold and used for various purposes, such as cooling drinks or for artistic displays.
Actually, she created Kevlar (Trademark) which is 5 - 9 times stronger than steel, yet lighter than fiberglass. The group of scientists she was working with at the time were trying to find a stronger material for automobile tires. If you would like to know more, please see the related link below:
The Scientific name for Bullet Proof Glass is Bullet Resistant Glass. It is referred to as Bullet Resistant Glass in the Industry as there is no such glass that can stop every bullet. A series of bullets that hit within a small area of the Bullet Resistant Glass will eventually project right through the glass.
Bullet Proof Glass (usually 2-4 inches), Hard Metals (usually1-3 inch) And Other Bullet Proof Materials.
Bullet proof glass is made by laminating very strong layers of plastic film between layers of glass. This is done under very high pressure.
Bulletproof glass is made by sandwiching multiple layers of materials, such as glass and polycarbonate, together. This combination of materials is designed to absorb and dissipate the energy from a bullet, preventing it from penetrating through the entire thickness of the glass. The specific construction of the glass allows it to deform and absorb the impact of the bullet, stopping it from passing through.
It is usually made from a combination of two or more types of glass, one hard and one soft. The softer layer makes the glass more elastic, so it can flex instead of shatter. Bullet-resistant glass is usually constructed using polycarbonate,thermoplastic, and layers of laminated glass.
the futher improvements that will be made to the ipod could be water proof and no headphones needed
Kevlar fabric
Bullet proof vests are made from many layers of woven,laminated fibers ,metal and ceramic plates.
Glass is usually made shatter proof in order too prevent long sharp pieces of glass injuring people. This is done by either applying a clear sheet of plastic too the glass, or the glass sheet is heated till just below the softening point and then cold air is blasted onto the glass, this way when the glass breaks into small chunks which would explain why in some cases the bullet only punctured a hole instead of shattering the whole sheet of glass.
A bullet resistant glass screen is made of a number of glass sheets which can be standard thicknesses window glass, separated by air gaps. Security films, preferably made of polyester, are provided on the front and rear surfaces of the glass sheets. A pressure sensitive adhesive can be used to adhere the security films to the glass sheets. The resistance off the screen to penetration by a bullet is increased by increasing the thickness of the air gaps. There is also a metal net on both sides of each glass pane to stop it shattering if a bullet hits it.
No, the Phoenicians got the idea of glass making from the Egyptians but the Egyptians glass was cloudy. After that that the Phoenicians made improvements to the glass and made it clear.
Kevlar is one of the best and well known bullet proof materials. it was originally made to be a material to make a tire but when they made it it was stronger than they thought it would be.