What is firework? I found this on Wikipedia (btw one of the best Online Encyclopedia on the Net!)A firework is classified as a low explosive pyrotechnic device used primarily for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display.
Fireworks (devices) take many forms to produce the four primary effects: noise, light, smoke, and floating materials (confetti for example). They may be designed to burn with colored flames and sparks. Displays are common throughout the world and are the focal point of many different cultural and religious celebrations.
Fireworks were originally invented by the Chinese, for entertainment purposes, as a natural extension of the Chinese invention of gunpowder. In China, they were first made by firework masters who were well-respected for their knowledge on the many complex techniques used to create truly dazzling firework displays. Such important events and festivities as New Year's and the Mid-Autumn Moon Festival were and still are times when fireworks are guaranteed sights.
Fireworks are generally classified as to where they perform, either as a ground or aerial firework. In the latter case they may provide their own propulsion (skyrocket) or be shot into the air by a mortar (aerial shell).
The most common feature of fireworks is a paper or pasteboard tube or casing filled with the combustible material, often pyrotechnic stars. A number of these tubes or cases are often combined so as to make, when kindled, a great variety of sparkling shapes, often variously colored. The skyrocket is a common form of firework, although the first skyrockets were used in war. The aerial shell, however, is the backbone of today's commercial aerial display, and a smaller version for consumer use is known as the festival ball in the United States. Such rocket technology has also been used for the delivery of mail by rocket and is used as propoulsion for most model rockets.
Improper use of fireworks may be dangerous, both to the person operating them (risks of burns and wounds) and to bystanders; in addition, they may start a fire if landing on flammable material. For this reason, the use of fireworks is generally legally restricted. In the United States, fireworks are classified as either consumer or display fireworks based upon the amount of pyrotechnic composition an item contains. Display fireworks are restricted by law for use by professionals. Consumer items are available to the public and are smaller versions containing limited amounts of material to reduce potential dangers.
Did you got that?? Well.. I didn't so here is it in Dutch :)
Vuurwerk is een constructie van materialen zoals karton, papier, plastic en metaal, met daarin ontplofbare en/of brandbare mengsels van chemische stoffen (ook wel sassen genoemd) verwerkt, die bij ontsteking verschillende effecten veroorzaken, zoals licht, geluid, rook of beweging. In vuurwerk wordt vaak buskruit gebruikt, dat bestaat uit zwavel (S), koolstof (C) en salpeter of kaliumnitraat (KNO3). Hierbij is het kaliumnitraat de zuurstofleverancier. Bij de reactie komen o.a. de gasvormige producten CO, CO2 en N2 vrij, naast kaliumsulfaat en -carbonaat. In het buskruit kan de verhouding tussen de stoffen verschillen; zo bestaat bijvoorbeeld een mengsel van koolstof, zwavel en kaliumnitraat in een gewichtsverhouding van 75:15:10. Verder bestaat er flashkruit, dat is buskruit waarin (een deel van) de koolstof is vervangen door metaalpoeder. Dat is met name verantwoordelijk voor de kleureffecten van het vuurwerk.
What fireworks?
- There are a lot of types and categories of Firework.. each has it own name and category of usage.
- Some can be used indoor as well! (what dangerous)
- Examples of firework: The Peony, Dahlia, Willow...
- They are very dangerous.. Do I have to mention the firework explosion in Enschede a few years ago?
So.. you and me have enriched our lives with the knowledge of Fireworks.. I still think of it as something very dangerous and will never use it or stand in the place where they are shooting them off! It happend one time at Ludwig that one of the arrows didn't shoot in the air, but stayed on the ground! That was very scary..!! I love to watch them though and think of them as very spectacular and beautiful. (I wonder if people in airplanes also see fireworks..)
Every fireworks have their own warning, lots of people has lost an eye or a lid to them dangerous things! Always handle with precausion! ;)
Love..
xxSara
Geen opmerkingen:
Een reactie posten