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The physics of fireworks
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Fireworks
When thinking of fireworks, many peoples first instinct is to picture bursts of color accompanied by the loud noises of the explosions. Not many people think of what all goes into the production of a firework and how it works. But then again, why would you when you could be enjoying a beautiful firework display? Exactly, you wouldn’t. Let me tell you a little bit about what goes into fireworks and why you see what you see. It will make you appreciate the fireworks even more than you already do.
The technical definition of a firework is “a device containing gunpowder and other combustible chemicals that causes a spectacular explosion when ignited”. In simpler terms it is something that has chemicals in it and when lit on fire makes a beautiful explosion.
There is still so much more to a firework than that, the producers of fireworks don’t just throw chemicals into a little tube, light it on fire and throw it into the air. There are a lot of flammable chemicals involved, and in order for fireworks to be pretty they have to put the right chemicals together and they have to be exactly the right amounts too.
There are four main chemical ingredients that go into fireworks in order for them to work the way that they do; fuel, an oxidizing agent, some type of colorant in which there is a metal, and a binder (Antonis). All of this is found inside of the aerial shell, this is where all of the chemical reactions take place. Once the substances are ignited, the fuel and the oxidizing agent react with each other and this reaction causes intense heat and gasses (Antonis). In the middle of the shell a charge with a fuse on top will explode because of the high temperatures and gasses emitted from the previously stated reaction (A...
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... grass and trees are already extremely dry people say that having their homes greatly out weighed the spectacular show of the fireworks (NYT).
I think that if the people behind fireworks could form a way to enhance them in a way that the risk of fires being started was lowered significantly then they would be a lot better. All of the things put into fireworks are pretty cool and its amazing how they work and how scientists have figured out what chemicals make each color. But having fireworks when you cannot use them because they may start a fire is not any fun.
I used to think of fireworks and think that they were like magic. I never put any logic into it. Now that I know what goes into them, and how they work, I think they are pretty awesome. You never really appreciate how much work goes into something until you know what it takes; you take things for granted.
The pyrotechnics were gerbs. Gerbs are cylindrical devices that are designed to spray 15-foot plumes of sparks in 15 seconds. Gerbs are befitting for use indoors, as long as the appropriate precautions are taken. The pyrotechnics ignited a polyurethane (egg crate foam) material that is used for packing and product display--but not for "sound proofing," as it was used lining the stage. Considering that this foam is not intended for use as a sound treatment in buildings, it was not treated with fire retardants.
Catching Fire: How Coooking Made us Human by Richard Wrangham is a fresh perspective on the evolution of humankind. Wrangham has made a concentrated effort to prove that humans have evolved particular adaptations, like bipedalism, due to the introduction of cooked foods into their diet. In his book, he is legitimately arguing that humans are the way they are because early on in human evolution, early man discovered fire, discovered the joys of cooked foods, and developed all sorts of fascinating traits still being utilized today.
The triangle factory fire was very tragic fire that happened. There were 500 people working. When the fire happened 146 people died in the fire they were 8th floor or above . Daniel Donahue Pulled the fire alarm on the 8th floor and the top floors did not hear the alarm all the bottom floors heard the aram. Everyone in the building was scared and did not know what to do( pg.All the people on the bottom were scared and they never went over the rules and what to do in case there is an fire.The doors were locked, and people were crowded trying to get out. What would you do in the fire if you were on the 9th floor?
Fire setting often begins with the child being curious as to what happens when you make a fire, but then it becomes a way for the child to deal with stress and anger. It is an act of “speaking out” because the child feels as if no one is listening and wants attention. This characteristic/behaviour could become more dangerous if the child keeps feeling the need to relieve stress/anger through setting fires, because the child will start setting bigger fires and experimenting with fires more.
ignited. (High grade powder doesn’t even need a flame to ignite – it can be set off by
Since man’s first experiences with fire we have longed to control it and we wished to will it to do our bidding. For very long we failed mostly, and we still do sometimes, but with the trials and experiments we have done and died doing, we succeed now, mostly. The first formula that is still written down of an “explosive or pyrotechnic composition” are the three examples of gunpowder in the 1044A.D. Chinese military guide Wujing Zongyao which showed a few uses of this powder they had experimented with for near a hundred years. The most used formula from it was approximately 50% KNO3, also known as Saltpeter in those times, and formally called Potassium nitrate today, ~25% S, Sulfur, and ~25% carbonaceous matter (mostly charcoal and compounds mixed with impure sulfur); the other formulas move the percentages for the KNO3 around 10-15%, S 5-10%, and carbonaceous 7-20% to adjust burn rates and usefulness in certain situations. The likely only reason gunpowder was ever invented was the Chinese’s wish to live long, and their many mixtures of elixirs, which was what gunpowder was intended to be used as (more-pyrotechnics.com). “Within 200 years China had several crude weapons, mostly huge iron or alternative metal barrels and maybe a wooden grip but with no aiming attachment. They also had very many types of fireworks using no telling how many formulae for devices ranging in size, color, and purpose. People in Europe hear of this powder and its power, and then slowly find out more“(more-pyrotechnics.com). Then by 300 years they had better arsenals, larger cannons that actually worked well, and better, lighter barrels. The Indians and Islamic nations have made use of this by now, neither surpassing China’s previous ones nor Europe’s futu...
Studying gaze behavior (where someone looks) is a very important area of research particularly in domain of behavioral psychology. Gaze behavior can, for instance, indicate the amount of attention paid in certain tasks and whether the performance is natural or not. Also, it can indicate the level of competence and experience of the user. Therefore, it can be used as an evaluative tool.
March 25th 1911 is the day one of the largest deadly workplace fires occurred. 146 factory workers died on this day as they fought to escape the Triangle Shirtwaist factory only to find locked exits, and faulty fire escapes. The public witnessed this display of poor fire safety and was quickly filled with sorrow. William Gunn Shepard claimed, “I remember their great strike of last year, in which these girls demanded more sanitary workrooms, and more safety precautions in the shops…. These dead bodies told the result.” This fire is often referred to as the tragedy that awakened the consciousness of America. The Triangle Fire showed the public the horrific working conditions that thousands of employees had at the time. The death of these 146
turn on lights as it makes fire and so they turn on all the lights
Being a flame warrior is takes aptitudes, and It's better than average opening for work for our life and our group or society and that occupation is unpleasant in light of the fact that need more vitality and more power and that what government requirement for nowadays really. As a matter of first importance firefighting is a profession that can make you feel glad and fulfilled, to your nation to help individuals if there are terrible circumstance, and it
It 's a nice day in July, the third, the day before all of the excitement. Families are out and about standing in lines wrapped around the store buying kerosene for their grills. Of course you can’t forget the Hotdogs, hamburgers, buns, jello, cake, icecream and popsicles. Any kind of food you could ever want and most in the color red white or blue. People are flocking to the firework stands to buy as many of the biggest and baddest fire works they have to offer. Kids spending there allowance on rockets, snakes, poppers, parachutes, and smoke bombs. Fourth of July is almost in full swing just a few more things before the big party. While all of these people are running around like ants in a frenzy swarming to the melted ice cream cone on the hot pavement. My aunt, uncle, and cousins are at their house preparing for the big party an annual fourth of july
It was not long after the sun set that the city’s organizers of the festival announced the event that everybody had been waiting for. All the younger kids got really excited and ran as far up as they could, the crowd started to settle, and each and everyone of us prepared our necks looking towards the eastern end. Soon loud music began and the fireworks began to soar through the sky! People were in “oooohs” and “ahhhs” every time as soon as rocket would go up and explode in front of a dark canvas, the night sky. The fireworks were in sync with the music and produced a plethora of colorful designs that lit the sky. Although the whole event lasted under 15 minutes, it was by far one of the most wonderful experiences to any party. People let out a sigh once the fireworks display was over and a thunderous applause
Over the years, the growth in technology used in to educate about fire safety has increased greatly. We now have many different ways to reach people of all ages. Some of this information includes: increased importance of the smoke detector, fire safety houses, fire safety videos, educational websites, high school cadet programs, and fire education equipment. All of these are very helpful and successful ways of teaching about fire safety.
Heads-Up Displays (HUD) are now used in many aircrafts so as to display information on the screen without needing the driver to cause distraction or to move their attention from the road. It was in the 1950’s that the Royal Aircraft Establishment in Farnborough started the Development of Heads-Up Displays for military flights. (Quarrington, 1966)
Fire begins with an idea of a spark. Then the spark is made and with the