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
Premium Vacuum tube Rectifier Transformer
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
Premium The Hunger Games Suzanne Collins Mockingjay
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
Premium Triangle Shirtwaist Factory fire New York City International Ladies' Garment Workers' Union
crashed. Horror screams pierced the air. Fire spread itself throughout the building like locusts destroying everything in its’ path. The orange clutches of fire wrapped its fiery fingers around the whole building turning everything into a gloomy black. The fire changed from orange to blue as the temperatures rose like the thick black fumes that were stretching skywards. I stood there helplessly feeling like a burnt child dreads fire. Shock and fear engulfed me. Cries of desperation
Premium Tears Pink Crying
at his grandparent’s house during the afternoon. His grandparents welcomed everyone. Jack’s grandpa told everyone to go get some rest because they are all going to the campground and they will build a campfire‚ eat marshmallows‚ and all other fun stuff. That evening everybody was sitting at the camp fire and having fun. But‚ Jack was curious about something‚ then after while he spoke. “Hey grandpa can we go to the Bear Lake tomorrow?” Jack asks. His grandpa looked nervous and stayed quiet for
Premium Family Grandparent
interior was also made of wood. Unfortunately there were no planned controls for evacuation in the event of fire. The Globe Theatre fire was an accident which was always going to happen - a real fire hazard. Shakespeare’s play Henry the 8th was being performed‚ when the misfire of a theatrical cannon caused the theatre to catch on fire. Everyone survived except a man who got caught on fire and then poured ale over him to try and put out the flames. Im sure we can all guess what happened there!!!
Premium Fahrenheit 451 Dystopia Ray Bradbury
Rapid Fire Progression Phenomena Brian J. Rocker Jr. American Military Institute Abstract Fire fighters are killed every year due to lack of knowledge on the job. This paper focuses on numerous studies that have been conducted on the lack of knowledge regarding enclosure fire behavior‚ to include: backdraft‚ flameover‚ and flashover. This paper‚ based off the National Fire Protection Association‚ (NFPA)‚ attempts to combine the many definitions and “truths” floating around about these such
Premium Fire Firefighter Combustion
Associated Fire Safety Fire Safety in Buildings Professor Walter W. Yuen Chair Professor in Thermal Sciences and Engineering Professor W. K. Chow Department Head and Director‚ Research Centre for Fire Engineering Department of Building Service Engineering The Hong Kong Polytechnic University Hong Kong‚ China BSE1D03 1 Topics covered in this talk: 1. Introduction. 2. The Risk of a Building Fire (Why do we care ?) 3. The “making” of a Building Fire 4. The Physics of a Building Fire 5. Efforts
Premium MTR
Fahrenheit 451 revels in seeing things eaten and things blackened by fire. His name is Montag and his world is immersed in flames from the outset‚ with a blaze so bright before his kerosene spitting python that it blinds. He breathes in fire beneath a flameproof jacket‚ his burnt-corked countenance expresses fire with a permanent grin “driven back by flame‚” while his perfume is the overwhelming stench of kerosene. His existence hinges upon fire so thoroughly that his experiences are defined in its terms
Premium Fahrenheit 451 Dystopia Ray Bradbury
An example of these disasters are floods‚ air pollution and forest fires. So‚ this essay will highlight the main causes of forest fires. The first main cause of forest fires is because of nature. It can be caused by many factors like lightning .When the Lightning strikes a tree‚ the tree begins to burn with fires which expanded to other trees and unlikely the flames continue non-stop. For instance‚ the numbers of forest fires which destroying million of hectares of valuable trees are increasing
Premium Causality Lightning Tree