Fire investigation Essay Example for Free

Fire investigation Essay The triangle shirtwaist factory fire may have been cause by various flammable materials. The flammable materials that I could identify from the text that I was given were the lines of hanging patterns, the discarded rags on the floor and cutting tables, the shirts that have already been made, the table because they were probably made from wood and maybe the ceiling, walls and floor because that may have a material or something else flammable. The possible sources of ignition for the triangle shirtwaist factory fire could have been some faulty cables from the sewing machines causing the wires to rub together causing friction meaning that the cables would get hot and therefore this could be one ignition source. Another source could be gas lighters because in those days people were allowed to smoke in the work place. A gas lighter is not like a lighter nowadays because when it was alight it would not go out unless you put the cap over it unlike the lighter nowadays if you let go/ drop it the button comes back up instantly. Therefore, the gas lighter could have been a source of ignition if it was dropped. Another source of ignition could have been a cigarette. If it was not put out properly and was dropped, it could start the fire. Lastly, candles may have caused the fire because back in those days there would have been candles on each workbench so that the workers could see what they were doing because there were no lights back then. Due to there being candles around if one was knocked/ dropped it could have fell onto the rags on the floor causing the fire to start. Investigation of Liquid Combustion Introduction In this experiment, we will find out why some liquids burn at certain temperatures. Risk assessment Due to the fact that we are dealing with fire, long hair must be tried back goggles warn and lab coats on. There was also a risk of that somebody could bur themselves or set alight an object. In addition, if we were to pick up a hot crucible without gloves we must use appropriate equipment so that we do not burn our hands. Materials Crucible Heat proof mat Bunson Burner Tongs Splint String 1cm3 of kerosene 1cm3 of petroleum spirit. Method Petroleum (1cm3) was placed into a crucible and was then ignited using a lighted split. Once we lighted the petroleum and it had a burned we then poured 1cm3 of kerosene and attempted to ignite it using a lighted splint. After you have tried to light the kerosene with just a lighted splint place about 2-3 cm length of string into the crucible so that it is partly dipping into the liquid. Note the appearance how the kerosene lit. Results Petrol- The flame was quite tall and was yellow. The petrol ignited very quickly and there was soot around the edges of the crucible. When the petrol have burned the flame go smaller until it went out by itself. Kerosene- The Kerosene did not light so therefore there was no flame. Kerosene with string- The string slowly burnt away until it reached the crucible with the kerosene in which then ignited. It burnt with a tall, large yellow flame and left a lot of soot in the crucible when it had all burnt. Evaluation The experiments purpose was to investigate why certain liquids burn at different temperatures. By burning the petrol it showed us that it had, a low flash point so would ignite and burn easily. The kerosene by it selves did not burn meaning it have a high flash point, meaning it needs high temperatures to ignite and burn. Both the petrol and kerosene produced soot showing full combustion. Conclusion In conclusion, the petrol was the easiest ignite and could start a fire very easily while the kerosene did not light with just a lighted splint. It has a high flash temperature that why it is used as aeroplane fuel. Investigation of flames Introduction In this experiment we will be investigating how long it takes for a piece of paper to burn when lit from the top corner and the bottom corner. Risk Assessment Due to the fact that we are dealing with fire, long hair must be tried back goggles warn and lab coats on. There was also a risk of that somebody could burn themselves or set alight an object. Materials 2 sheets of A4 paper Heat proof mat Stands and Clamps Bunson Burner Splint Timer 2 sheets of A4 paper Method First we attached the clamps to the stands, and then attached a piece of A4 paper. We then lit the top of the short edge in the middle. It was then timed how long the piece of paper took to burn away completely and the time recorded. The experiment was then repeated with another piece of paper but lit at the bottom edge. Again it was timed until the paper was completely burned away and the time recorded. The Results `1st Paper: It started to burn instantly and spread downwards. The paper then dropped out of the clamps and fell to the table but it was not all burnt. After a while it all burnt out at 2 minutes and 11 seconds. 2nd Paper:. : It started to burn instantly and spread downwards. The paper then dropped out of the clamps and fell to the table but it was not all burnt. After a while it all burnt out at 23. 43 seconds.

Identification Essay -- essays papers

Identification The identification process is perhaps the biggest problem in gifted education. In the United States, it is estimated that 47,846,000 children are enrolled in K-12 public schools. Of these students, approximately 2,393,000, or five percent, are considered gifted (Genius Denied, 2005). Developing procedures to identify these exceptional students can be an arduous task. However, Coleman has stated that, â€Å"Identification remains critical to ensuring that children receive the services they need to thrive in school† (2003, 1). There are several problems educators deal with when identifying gifted students. First, students from economically disadvantaged families or from culturally diverse backgrounds are considerably underrepresented in gifted programs. Also, gifted children with other noted disabilities are not represented. These students, also called twice-exceptional students, are especially hard to identify and instruct, as they may require advanced learning in certa in areas as well as remedial education in other areas (Winebrenner, 2003). Second, many educators are not trained to deal with such drastic above average intelligence, and they tend to rely on only one aspect of intelligence, such as an IQ score or a result from a standardized test, to identify intelligent students. These educators need to realize that intelligence is more complex, and may be evident more in portfolios, group projects, performance-based assessments, or a summation of work displayed over time. And finally, there is often a disparity between identification and the services involved. For example, a student identified as advanced in mathematics alone would probably not benefit from grade skipping, as he/she may fall behind in... ... Willard, P. (2002). Catering to the needs of gifted children. Dodge City Daily Globe. Retrieved 24 February 2005 from http://www.dodgeglobe.com/stories/092702/lif_gifted.shtml. This article tells the story of Erich Steubgen, a gifted student. The article then goes on to evaluate the emotional aspects of gifted and talented children – how they feel in a normal classroom, and warning signs for teachers who might be thrown off by adverse behaviors. Hagy, J. (2004). Hidden Genius. Teacher Magazine, 15(6), pp. 51-52. Retrieved 20 February 2005 from www.edweek.org. This resource provided information about the frustrations involved in identification from a parent’s perspective. Winner, E. (1996). The miseducation of our gifted children. Retrieved 21 April 2005 from www.edweek.org. This article mainly reviews several points I made in my paper.

Stefan’s Diaries: Bloodlust Chapter 7

The next evening I gazed contented at the sun setting over the harbor. Miss Molly hadnt exaggerated: The girls at her house were hospitable. For breakfast Id had one with long, corn-silk hair and bleary blue eyes. I could still taste her wine-laced blood on my lips. Damon and I had spent the day wandering the city, taking in the wrought-iron balconies in the French Quarter–and the girls who waved to us from their perches there–the fine tailor shops with bolts of sumptuous silk in the windows, and the heady cigar shops where men with round bellies struck business deals. But of all the sights, I liked the harbor best. This was the citys lifeblood, where tall ships carrying produce and exotic wares entered and exited. Cut off the harbor, you cut off the city, making it as vulnerable and helpless as Miss Mollys girl had been that morning. Damon gazed out at the boats as well, rubbing his chin thoughtfully. His lapis lazuli ring glinted in the fading sunlight. â€Å"I almost saved her.† â€Å"Who?† I asked, turning sharply, hope swelling in my chest. â€Å"Did you sneak off and feed from someone?† My brother kept his eyes on the horizon. â€Å"No, of course not. I meant Katherine.† Of course. I sighed. If anything, last night had made Damon more malcontent than ever. While Id enjoyed the company and the sweet blood of a girl whose name I would never know, Damon had retired to a room of his own, treating the establishment as if it were simply the boardinghouse it pretended to be. â€Å"You should have drunk,† I said for the hundredth time that day. â€Å"You should have taken your pick.† â€Å"Dont you understand, Stefan?† Damon asked flatly. â€Å"I dont want my pick. I want what I had–a world I understood, not one I can control.† â€Å"But why?† I asked, at a loss. The wind shifted, and the scent of iron, mixed with tobacco, talcum powder, and cotton, invaded my nostrils. â€Å"Feeding time already?† Damon asked wryly. â€Å"Havent you done enough damage?† â€Å"Who cares about one whore in a filthy brothel!† I yelled in frustration. I gestured out to the sea. â€Å"The world is filled with humans, and as soon as one dies, another appears. What does it matter if I relieve one wretched soul of its misery?† â€Å"Youre being careless, you know,† Damon grunted. His tongue darted out of his mouth to lick his dry, cracked lips. â€Å"To feed whenever you feel like it. Katherine never did that.† â€Å"Yes, well, Katherine died, didnt she?† I said, my voice much harsher than I meant it to be. â€Å"Shed have hated who youve become,† Damon said, sliding off the fence and standing next to me. The scent of iron was more pervasive now, curling around me like an embrace. â€Å"No, she would have hatedyou,† I retorted. â€Å"So scared of who you are, unable to go after what you want, wasting your Power.† I expected Damon to argue, to strike me even. But instead he shook his head, the tips of his retracted canines just visible between his partially open lips. â€Å"I hate myself. I wouldnt expect any different from her,† he said simply. I shook my head in disappointment. â€Å"What happened to you? You used to be so full of life, so ready for adventure. This is the best thing that has ever happened to us. Its a gift–one thatKatherinegave to you.† Across the street, an old man hobbled past, and then a moment later, a child on an errand rushed by in the opposite direction. â€Å"Pick one and feed! Pick something, anything. Anything is better than just sitting here, letting the world go by.† With that I stood, following the iron and tobacco scent, feeling my fangs pulse with the promise of a new meal. I grabbed Damon, who lagged a few paces behind me, until we found ourselves on a slanted lane out of range of the gaslights. What little light there was gathered onto a single point: a white-uniformed nurse, leaning against a brick building, smoking a cigarette. The woman looked up, her startled expression turning into a slow smile as she took in Damon. Typical. Even as a blood-starved vampire, Damon, with his shock of dark hair, long lashes, and broad shoulders, caused women to look twice. â€Å"Want a smoke?† she asked, blowing smoke into concentric circles that blended with the mist in the air. â€Å"No,† Damon said hastily. â€Å"Come on, brother.† I ignored him, stepping toward her. Her uniform was spattered with blood. I couldnt stop staring at it and the way the rich red contrasted to the stark white. No matter how often I had seen it since changing, blood continued to awe me with its beauty. â€Å"Having a bad night?† I asked, leaning next to her against the building. Damon grabbed my arm and started to pull me toward the lights of the hospital. â€Å"Brother, lets go.† Tension coiled in my body. â€Å"No!† It took a swat of my arm to toss him against the wall. The nurse dropped her cigarette. The ash sparked, then extinguished. I felt the bulge of my fangs behind my lips. It was just a matter of time now. Damon struggled to his feet, crouching low as if I was going to strike him again. â€Å"I wont watch this,† he said. â€Å"If you do this, I will never forgive you.† â€Å"I have to get back to my shift,† the nurse muttered, taking a step away from me, as if to run. I grabbed her arm and pulled her to me. She let out one short yelp before I covered her mouth with my hand. â€Å"No need to worry about that anymore,† I hissed, sinking my teeth into her neck. The liquid tasted like rotting leaves and antiseptic, as if the death and decay of the hospital had invaded her body. I spit the still warm liquid into the gutter and threw the nurse to the ground. Her face was twisted in a grimace of fear. Stupid girl. She should have sensed the danger and run while she still could. It hadnt even been a hunt. Worthless. She groaned, and I wrapped my fingers against her throat and squeezed until I heard the satisfying crack of bone breaking. Her head hung at an unnatural angle, blood still dripping from the wound. She wasnt making any noise now. I turned toward Damon, who stared at me, a horrified expression on his face. â€Å"Vampires kill. Its what we do, brother,† I said calmly, my gaze locking on Damons blue eyes. â€Å"Its whatyoudo,† he said, taking off the coat around his shoulders and throwing it over the nurse. â€Å"Not me. Never me.† Anger pulsed like a heart at the very core of my being. â€Å"Youre weak,† I growled. â€Å"Maybe so,† Damon said. â€Å"But Id rather be weak than a monster.† His voice grew strong. â€Å"I want no part in your killing spree. And if our paths ever cross again, I swear I will avenge all of your murders, brother.† Then he spun on his heel and ran at vampire speed down the alleyway, instantly disappearing into the swirling mist.

Causes of Water Pollution and Cures to Stop It Now

Causes of Water Pollution and Cures to Stop it Now Nature plays a role when it comes to toxins like mercury and other heavy metals, but humans are among the major causes of water pollution. We have always treated the planet with a certain level of disregard, as if we simply thought that nothing we could do would be of any consequence. Now though, the way we have treated our environment is coming back to haunt us. Since the beginning of the industrial revolution we have unleashed 80,000 chemical agents into the environment, and now traces of these chemical agents reside in our drinking water reservoirs. You may think that such miniscule amounts of these toxins cannot do you any real harm, but the truth is that even chemical traces can†¦show more content†¦Pollution is one of the signs that humans have exceeded those limits. How serious is the problem? According to the environmental campaign organization WWF: Pollution from toxic chemicals threatens life on this planet. Every ocean and every continent, from the tropics to the once-pristine polar regions, is contaminated. Photo: Detergent pollution entering a river. Photo courtesy of US Fish amp; Wildlife Service Photo Library. What is water pollution? Water pollution can be defined in many ways. Usually, it means one or more substances have built up in water to such an extent that they cause problems for animals or people. Oceans, lakes, rivers, and other inland waters can naturally clean up a certain amount of pollution by dispersing it harmlessly. If you poured a cup of black ink into a river, the ink would quickly disappear into the rivers much larger volume of clean water. The ink would still be there in the river, but in such a low concentration that you would not be able to see it. At such low levels, the chemicals in the ink probably would not present any real problem. However, if you poured gallons of ink into a river every few seconds through a pipe, the river would quickly turn black. 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