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Essays on Science

PyroTechnics
Download This PaperWords: 484 - Pages: 2

... local level. In general, all are explosives, but not all explosives are . Class A explosives (high explosives) are materials like dynamite and Primacord which may detonate even if unconfined. Pyrotechnic special effects materials are Class B explosives. They will burn, but not explode unless confined. Examples are black powder and pellet powder, safety fuses, igniters, igniter cord, fuse lighters, Class B special fireworks, and Class B composite solids propellants. Class C explosives are common fireworks. Note that short lengths of Primacord may be classified as Class C under certain conditions. Both Class B and C explosives are also called low explosives. A ...



The Study Of Akali Metal Contamination In Road Side Soil
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... Over time, the accumulation akali metal salts can change the chemical profile of the soil which can lead to detrimental biological effects. Flame atomic spectroscopy provides a technique that can quantify metal concentrations in the extracts of the soil samples and consequently examine the relationship between distance from the point of road salt application and akali metal concentrations. Experimental Soil preparation: Six surface soil samples were collected at the intersection of Cold Spring Lane and the exit ramp of Interstate 83, in northwest Baltimore city. These samples were collected at distances from the roadway of 0m, 2m, 4m, 6m, 10m, and 20m. Thes ...



The Geiger-Muller Tube
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... down the center of this cylinder. The voltage across the wire and cylinder is kept just below the point at which a spontaneous discharge, or spark, occurs. When a charged particle or gamma ray enters the tube , it ionizes a gas atom between the copper cylinder and the wire. The positive ion produced is accelerated toward the copper cylinder by the potential difference. The electron is accelerated toward the positive wire. As these new particles move toward the electrodes, they strike other atoms and form even more ion in their path. Thus an avalanche of charged particles is created and a pulse of current flows through the tube. The current causes a potent ...



Tourette Syndrome
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... us to maintain homeostasis. The nervous system can be broken down further into its three basic functions: sensory functions, integrative functions, and motor functions. In sensory functions, your body’s sensory receptors detect many different stimuli in and outside of your body. For example, your sensory receptors may detect a change in your blood temperature, or a change outside of your body such as a touch on the arm. Your body then goes through a process know as its integrative function. This is when your nervous system processes information sent via your sensory neurons and in a way “makes decisions” regarding appropriate responses. When all is said and ...



Metabolic Costs Of Generating Force
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... the time available to generate force. The rate of force generation also explains differences in metabolic rate over the size range of birds measured. However, for a given rate of force generation, birds use on average 1.7 times more metabolic energy than quadrupeds. The rate of energy consumption for a given rate of force generation for humans is intermediate between that of birds and quadrupeds. These results support the idea that the costs of muscular force production determines the energy cost of running and suggest that bipedal runners use more energy for a given rate of force production because they require a greater volume of muscle to support their body ...



Condor
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... its parents through the next breeding season. Like all vultures, s are carrion-eaters. They prefer large dead animals like deer, cattle, and sheep, but will also eat rodents and more rarely, fish. If a meal has been particularly big, they may have to spend hours on the ground or a low branch before they can take off again. s are fastidious birds -- after eating, they clean their heads and necks by rubbing them on grass, rocks, or tree branches. s also bathe frequently and spend hours preening and drying their feathers. s were probably never very numerous in North America. The species once ranged along the entire Pacific Coast from British Columbia to Baja Califo ...



The Wolverine
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... America. Their distribution once extended as far south as Colorado, Indiana, Pennsylvania, and perhaps Michigan. It looks like a weasel maybe because it is in the weasel family.It has black and brown fur and long claws.It’s legs are short but strong. The Wolverine is usually solitary except for members of the opposite sex and a female's young. After the females give birth they hide with their young. The mother defends her territory and intruders are not tolerated. This territorial behavior continues until the young are ready to hunt on their own. The Wolverine has a diet that can include anything from small eggs to full-sized deer. The Wolverine is capable of bri ...



Creationism Vs Evolution: Through The Eyes Of Jay Gould
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... is back with greater force than ever. This is why this subject is more important now than ever. In Jay Gould’s book The Panda’s Thumb, an overview of and an argument for Charles Darwin’s evolutionary thinking is conducted with flowing thoughts and ideas. This essay titled "Natural Selection and the Human Brain: Darwin vs. Wallace" takes a look directly at two hard fought battles between evolutionists and creationists. Using sexual selection and the origins of human intellect as his proponents, Gould argues his opinion in the favor of evolutionary thought. In this essay titled "Natural Selection and The Human Brain: Darwin vs. Wallace," Gould tells about t ...



Ebola Virus 2
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... break in Sudan in 1979 was smaller with 22 deaths out of the 34 cases. The first outbreaks in Zaire and western Sudan were large resulting in 340 deaths out of the 550 cases. The most recent outbreak is in Kikwit, Zaire. The outbreak appears to have started with a patient who had surgery in Kikwit on April 10, 1995. Members of the patient's surgical team developed symptoms similar to those of a viral hemorrhagic fever disease. The symptoms of Ebola hemorrhagic fever begin 4 to 16 says after infection. Victims develop fever, chills, headaches, muscle aches, and loss of appetite. The patient will suffer vomiting, diarrhea, abdominal pains, soar throat, and ...



Wired Hands - A Brief Look At Robotics
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... or grippers for picking up objects. The robots working at Chrysler and in numerous other modern factories are extremely adept at performing highly specialized tasks - one robot may spray paint car parts while another does spots welds while another pours radioactive chemicals. Robots are ideal workers: they never get bored and they work around the clock. What's even more important, they're flexible. By altering its programming you can instruct a robot to take on different tasks. This is largely what sets robots apart from other machines; try as you might you can't make your washing machine do the dishes. Although some critics complain that robots a ...




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