Fire alarm circuit ABSTRACT Here is a simple fire alarm circuit based on a Light Dependent Resistor (LDR) and lamp pair for sensing the fire. The alarm works by sensing the smoke produced during fire. The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the bulb will be directly falling on the LDR. The LDR resistance will be low and so the voltage across it (below 0.6V). The transistor will be OFF and nothing happens. When there is sufficient
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During this time‚ there was a lack of federal regulation against the monopolistic companies. The Triangle Factory Fire serves as the pivotal point in women’s rights and labor rights during the Progressive Era in United States history. The documents examine the roles of Progressive reformers in challenging the government to take more control in regulating the workplace
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of planes and parachute into small fires and attack them before they have the chance to become large. The training the smoke jumpers underwent was extremely rigorous and challenging‚ even undergoing 3 weeks of training before each season. The USFS used a rotation basis to keep the men fresh so after a man fought a fire he was put at the bottom of the list of available fighters‚ thus the teams changed for every fire. Smoke jumpers were used to small ground fire caused by mistakes made by humans or
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Love is one of many themes in Snow Flower and the Secret Fan. This novel is a perfect example that everybody needs love in their life. Love can be expressed in the most indirect‚ but effective ways. Lily and Snow Flower became friends very quickly. They share each other’s stories and communicate on a fan that will forever be a symbol of their friendship. When Lily and Snow Flower were finally allowed to see one another‚ you would never catch them apart and were always by each other’s side.
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In the movie “October Sky” by Joe Johnston‚ which is based on a true story written by Homer Hickam Jr. there was a boy with a dream to reach the stars. Homer Hickam watched the first artificial satellite Sputnik launch into space. The launch made Homer realize that he wanted to build a rocket of his own. Homer had faced many obstacles‚ people‚ and he even had to sacrifice his dreams. I think the theme should be - Dream’s are worth fighting for‚ but sometimes sacrifices are needed. One reason I
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The Triangle Shirtwaist Fire http://www.ilr.cornell.edu/trianglefire/ Introduction The fire was at the Triangle Waist Company in New York City Claimed the lives of 146 young immigrant workers This incident has had great significance to this day because it highlights the inhumane working conditions to which industrial working conditions to which industrial workers can be subjected Sweatshops & Strikes before 1911 Was a typical sweated factory in the heart of Manhattan Located at 23-29
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“The Bride Comes to Yellow Sky‚” written by Stephen Crane reflects on issues surrounding the eighteen centuries in the east and west of Texas. Crane reveals historical pieces by describing the area and surrounding of the east‚ which seems undeveloped and not so modernizes. During the eighteen centuries there were conflicts between the east and west resulting in different cultural and social matters because of Jack’s hesitation about bringing his new bride to Yellow Sky. There is also a reference
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“Fire Fighter Arson” The reason I decided to choose this topic‚ and not something about a particular part of the fire service‚ is because I was watching a TV show CSI where they solve crimes and such. Well this topic of fire fighter arson was on the show where a fire fighter set a fire on purpose. So I decided that it looked interesting considering it is what I want to do. Fire fighter arson is basically when a fire fighter sets a fire and I will break it down on why some fire fighters do
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CHAPTER 1. INTRODUCTION 1.1 Background Fire safety is everybody’s concern. Poor fire safety practices and improper planning for fire emergency can consequently lead to critical situations. This is more threatening particularly for buildings which accommodate laboratories‚ chemical stores or server rooms. Observance and application of fire prevention principles can help to reduce or eliminate potential fire hazards. Moreover‚ much emphasis must be put on elaboration of a well designed emergency
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Banning Catching Fire by Suzanne Collins has good intentions—protecting children; however‚ children/teenagers should be trusted to make their own decisions about what they read. Books are usually challenged or banned to protect others‚ for example; violence‚ sexually explicit or offensive language. Catching fire is said to be challenged because of its violence‚ anti-ethnic‚ anti-family‚ insensitivity‚ and offensive language. The Hunger Games series was on the 2010 challenged books lists. I believe
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