Physics of Fireworks
– After black powder was discovered by the Chinese in the 9th Century, the relatively short history of fireworks began with this explosive chemical composition. Black powder is made up of potassium nitrate, sulfur, and charcoal (KNO3); in the correct amounts, this combination has very explosive results. The use of black powder sprung forth the evolution of muskets, rockets, and fireworks. Although history has shown that the development of black powder muskets into modern day guns, artillery, and weapons of mass destruction have changed the face of the earth, taken many lives, and changed the outcome of many wars, black powder is also used in many rituals and celebrations….
– Setting off fireworks to celebrate festivals and happy occasions has been a tradition for Chinese people. The loud booms as well as the striking spectacles displayed by the fireworks add to the jubilance of the day. However, the most beautiful aspects of fireworks cannot compensate for the problems they generate. Whether to ban the fireworks has always been a controversial topic among people. As the Air Pollution Index in Beijing becomes incredibly high this winter, a new discussion on the necessity of firework banning policy has been raised….
Aluminum Contamination Due to Firework Industry
– … The increase in metal uptake with increased temperatures can be attributed to either high affinity of sites for the metal or to an increase in the binding sites on the biomass, under the experimental conditions (Sar? and Tuzen 2009). Maximum biosorption of aluminium (79 mg/L) was obtained at optimum temperature of 35 °C. The substantial growth of the bacterial biomass was observed at 35 °C, further increase in temperature affect the cell growth. At the optimum temperature, the energy of the system seems to facilitate aluminium attachment onto cell surface, but when the temperature is even higher, metal sorption was decreased due to damage of certain surface sites of cell available for me…
Katy Perry Shows Anyone Can be Courageous in Firework Video
– A five-year-old girl who is unable to swim is drowning in a pool, where the depth is ten feet. She is incapable of communicating for help and continuously gulps copious amounts of water while kicking her legs and flinging her arms frantically. A young boy who is learning how to swim notices her desperate need for a rescue, but is too hesitant to do anything due to his fear of deep water. He then realizes that he does not want a young girl to die just because no one was able to come to her rescue, and builds up the courage to enter the deep end of the pool….
History of Fireworks
– History of Fireworks The birthplace of fireworks is generally recognized as China, with the first explosive mixture found being black powder, during the Sung dynasty ( 960-1279 ). It is said that a cook in ancient china found that a mixture of sulfur, saltpeter, and charcoal was very flammable and would explode if enclosed in a small space. The first application of this technology was for entertainment. The Chinese are still the leader in the production of fireworks. Once the recipe for black powder was perfected, they found that it was easily used as rocket fuel, and they made hand carved wooden rockets in the shape of a dragon, in the sixth century….