A firework is an incendiary device or material that can be used for signalling or entertainment. There are chemicals in the top of the firework that explode‚ which makes the colours seen. Fireworks‚ first originated in ancient China‚ with the first explosive being created from a mixture of black powder during the Sung dynasty. The firework was created by a combination of sulfur‚ saltpeter and charcoal. The Chinese found that the combination of these ingredients was very flammable and would blow up
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Chemistry of Fireworks The sights and sounds of each explosion are the result of several chemical reactions – oxidations and reductions – taking place within the firework as it ascends into the sky. Oxidizers produce the oxygen gas required to burn the mixture of reducing agents and to excite the atoms of the light-emitting compounds. Various oxidizers are used in both the black powder and the stars. The most commonly used oxidizers are nitrates‚ chlorates‚ and perchlorates
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------------------------------------------------- Advertising media scheduling Scheduling refers to the pattern of advertising timing‚ represented as plots on a yearly flowchart. These plots indicate the pattern of scheduled times advertising must appear to coincide with favorable selling periods. The classic scheduling models are Continuity‚ Flighting and Pulsing. [edit]Continuity This model is primarily for non-seasonal products‚ yet sometimes for seasonal products. Advertising runs steadily
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Introduction Blue Chip Blue chips are the biggest‚ most stable‚ and often the most reputable companies in existence. The term comes from casino houses‚ whihc use colored plastic chips to represent the money patrons gamble with. Traditionally‚ blue chips were the most valuable color chip of all; but in gambling today blue chips are among the lowest valued chips‚ and also the most widely recognized. This is in standing with the financial industry’s strong feeling for its own history: investors
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A firework is an incendiary device or material that can be used forsignalling orentertainment. There are chemicals located in the nose ofthe rocket that explode‚ producing the colours seen. The art of fireworks‚ first originated in ancient China‚ with thefirst explosive being made from a mixture of black powder during theSung dynasty. It is believed that the explosive mixture was created bya combination of sulfur‚ saltpeter and charcoal. The Chinese foundthat the combination of these ingredients
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advantages and potential disadvantages to Red Fish‚ Blue Fish of having China as its sole source of supply? What do you recommend? 1.1 Advantages • Reduction of unit cost Red Fish‚ Blue Fish can have the benefit of unit cost reduction due to bulk purchases as they use Liu-Sheng Trading as a sole source of supply for all their orders. • Loyalty discount Red Fish‚ Blue Fish can have the benefit of loyalty discounts‚ Liu-Sheng would perceive Red Fish‚ Blue Fish as brand loyal customer and give
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1. Why is scheduling fairly simple for repetitive systems but fairly complex for job shops? Scheduling for repetitive systems is fairly simple because the activities and equipment used is the same. This goes for high-volume and medium volume systems because the productions are the similar. Scheduling for job shops is more difficult because the products formed are customized or of a personal nature and therefore are not mass produced. Stevenson‚ William J. Operations Management‚ 11th Edition. McGraw-Hill
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1 CPU Scheduling What Is In This Chapter? • This chapter is about how to get a process attached to a processor. • It centers around efficient algorithms that perform well. • The design of a scheduler is concerned with making sure all users get their fair share of the resources. 5: CPU-Scheduling 2 CPU Scheduling What Is In This Chapter? • • • • • • • • • Basic Concepts Scheduling Criteria Scheduling Algorithms Multiple-Processor Scheduling Real-Time
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Fireworks and What Makes Them Go Sparks! Colors! Things that go BOOM! Chemistry doesn’t get much better than this. Ever notice how minutes drag on for hours when you’re waiting for a fireworks show to begin? Everyone’s thinking the same thing: The sky is dark enough the hot dogs are all eaten…come on when are they going to start? Then the first rockets streak into the sky…Ooh! Aah! Yes‚ it was worth the wait. The birthplace of fireworks is generally recognized as China.
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Shopping Cart FIREWORKS UNIVERSITY : HISTORY OF FIREWORKS Fireworks originated in China some 2‚000 years ago. The most prevalent legend has it that fireworks were discovered or invented by accident by a Chinese cook working in a field kitchen who happened to mix charcoal‚ sulphur and saltpeter (all commonly found in the kitchen in those days). The mixture burned and when compressed in an enclosure (a bamboo tube)‚ the mixture exploded. Some sources say that the discovery of fireworks occurred about
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