Speed of Sound in Air By: James Chen Lab Partner: Jin Zhang and Jake Salpeter Phys 130‚ Lab section: EE11 TA: Khaled Elshamouty Date of lab: October 29‚ 2013 Introduction Sound is a longitudinal (compressional) wave caused by a vibrating source. In this experiment‚ we use standing sound waves created by the tuning forks to determine the speed of sound in air in a tube when it reaches different resonances. In this lab we focused primarily on using standing sound waves (compressional
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Speech on air pollution Air pollution is harmful to the environment. I would like to talk about the harmful effects of air pollution. Air pollution has to stop. It is harming humans and our environment. People are causing it‚ and making it worse for them selves. I will talk about other reasons why it must stop. Air pollution is a chemical in the air that harms humans and other living things. The atmosphere is complex‚ it has natural gases that support life. Ozone depletion due to air pollution
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Air pollution has become one of the most important concerns of the local authorities of Latin- American cities. Bogotá‚ like as other urban centers in South America such as Sao Paulo‚ Mexico City and Santiago de Chile‚ shows significant levels of air pollution‚ levels that may represent a high risk for the population’s health and certainly a reduction in the quality of life of its inhabitants. Bogotá‚ capital of Colombia‚ is one of the largest cities of Latin America; with a population of around
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discussing the Clean Air Act of 1970 along with the amendments made in 1977 and 1990. I will discuss the law and some of the provisions that have been made. I will discuss the economic impact as a result of this law; if there are any fines‚ costs‚ or benefits economically along with data to support this information. I will also discuss my feelings on whether this law has been beneficial and also provide information to support my answer. Clean Air Act The Clean Air Act of 1970 is a federal
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Executive Summary The HNA group re-launched its commercial carriers under a new entity: Grand China Air; their strategy was to create a brand where its four major airlines (Hainan‚ Shanxi‚ Xinhua‚ and Chang’an airlines can compete globally. They have delivered very good financial returns and have expanded throughout the Chinese market in a relative short period of time. HNA is not a governments entity. this allowed them to expand very rapidly by increase the size of its equity from stock markets
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“Brilliant. Vertiginously exciting…vibrantly imagined. An achievement of extraordinary depth and beauty of the natural world.” –Raul Dagmar Into Thin Air is based on a true story seen through the eyes of Jon Krakauer. He is a journalist and mountain climber who decides to climb the treacherous Mount Everest and joins the most disastrous expedition in history. Krakauer mixes in with the climbing service called Adventure Consultants‚ which is guided by Rob Hall who is also responsible for the lives
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Air Pollution 20.000 liters of air is what we breathe on a daily basis. Air is something most people take for granted‚ you don’t see it around you and breathing goes automatically. But every time we inhale we risk inhaling dangerous chemicals which found their way in our air. Air pollution is the presence of dangerous chemicals in the air that we breathe. It is a change in the air which influences humans health and organism on the planet. Many think that `gases’’ pollute the air‚ those gases
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The Prevalence of Asthma Associated with Air Pollution Air pollution is the initiation of chemicals‚ particulate matter‚ or biological materials that cause harm or discomfort to humans or other living organisms‚ or damages the natural environment into the atmosphere. Air pollution occurs when the air contains gases‚ fumes‚ dust‚ or other harmful agents. According to Morgan (2003)‚ air pollution was not a problem until the 19th century and Industrial Revolution because pollution was readily
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AIR POLLUTION The main reason of Air Pollution is burning of fossils fuels in large quantities accent decades has resulted in gradual increase in carbon dioxide content in the atmosphere. It is estimated that content of carbon dioxide has increased by 25% during the last 100 years. Carbon dioxide allows in solution to pass through but absorbs out going terrestrial radiation increase of Carbon dioxide in the atmosphere has the effect of increasing the temp of atmosphere. It is estimated that global
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Causes of air pollution: Unwanted material present in air is referred as air pollution. The causes of air pollution may be * Natural process: For instance volcanic eruption and forest fire because of lightening. * Man- made process: for instance combustion of fossil fuels. Most of the air pollution is man – made. In metropolitan areas‚ combustion of petrol and its byproducts result in release of air pollutant. Incomplete combustion releases a toxic compound called carbon monoxide in to
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