Mains gas is most likely to be piped natural gas. The most serious risk to human health is via a leak‚ however small‚ in the piping system that transports the gas inside the building. Natural gas is a mixture of hydrocarbons‚ including methane. It is colourless and odourless‚ which makes a leak difficult to notice. Exposure to high levels of natural gas quickly causes unconsciousness and even death. Exposure to low levels can cause dizziness‚ nausea or heart palpitations. It has this affect because
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Depending on what type of farm you visit‚ you will see different things. Most farms are using fertilizer or other additives in their agriculture but there are also farms that are completely natural and organic. Depending on your beliefs‚ you may think organic is better than industrial and vise versa. Each has its own pros and cons. The use of organic practices in food and livestock has a positive long term effect on the earth and its environment. In the United States we have about 313‚000‚000 people
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coal producing SO2 loadings up to 7.5 lbs/MBtu. To increase the removal in the WFGD system‚ MSCPA and B&W added a second tray in 2002 to take advantage of dual tray technology. SO2 removal has been increased from 90% to 98% without the use of organic acids. Performance tests and parametric tests have been performed on the system over the last two years. The testing also included tests for SO3‚ HF‚ HCl‚ and PM. This paper discusses the absorber design‚ operating parameters‚ results of the testing
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investigation was to investigate the effect of substrate concentration Hydrogen Peroxide H O (in %) on the rate of reaction of the enzyme catalase (in 1/mean time). Prediction: As the substrate concentration (hydrogen peroxide) in % increases the rate of reaction in 1/mean rate increases until the solution becomes saturated with the substrate hydrogen peroxide. When this saturation point is reached‚ then adding extra substrate will make no difference. The rate steadily increases when more substrate
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efficient. Autotrophs are the basis of almost all ecosystems. The rate that autotrophs produce and transfer energy is vital to the capacity of organisms that can inhabit these ecosystems. To understand the rates in which certain species’ leaves decay and release the energy stored within them can demonstrate how quickly the energy becomes available to organisms in higher trophic levels. Between plant species the rate of decomposition varies according to leaf structure‚ chemical or physical defence
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resource that gives us 80% of our fuels‚ Fossil Fuels. 99% of today’s cars run using either diesel or petrol‚ (both are fossil fuels). At the rate these fuels are getting used‚ by 2020 the international oil suppliers will not be able to keep up with this high demand. There have been many different fuel alternatives to replace diesel and petrol‚ but none more seem more suitable than hydrogen. The possibility of hydrogen as a fuel is ever increasing‚ with the advantages outweighing the disadvantages
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Organic Compounds Marilena Tagritzis 11-A Mr. Daniel Chemistry May 10‚ 2011 Organic Compounds An organic compound belongs to gaseous‚ liquid‚ or solid chemical compounds whose molecules contain carbon. Some types of carbon that contain compounds such as carbides‚ carbonates‚ and oxides of carbon and cyanides are sometimes classified as inorganic. AllotropesHYPERLINK "http://en.wikipedia.org/wiki/Allotropes_of_carbon" of carbon such as diamond and graphite may also be classified as inorganic
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The Catalyst to the Korean War It is often thought of‚ as the “Forgotten War”‚ the Korean War took place between the years 1950-1953. Korea was a frequently fought-over peninsula in the late 19th century and early 20th century. Korea was dominated by China as a tributary nation for centuries‚ fought over by China and Japan in the first Sino-Japanese War (1894-1895) and fought over again by Japan and Russia in the Russo-Japanese War (1904-1905)‚ both wanting it for colonization. It was annexed
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Journal of College Teaching & Learning – November 2011 Volume 8‚ Number 11 The Effects Of Using Collaborative Learning To Enhance Students‟ English Speaking Achievement Fasawang Pattanpichet‚ Bangkok University‚ Thailand 1 ABSTRACT This experimental study aims to investigate the effects of using collaborative learning to enhance students‟ speaking achievement. The study using a pre-test and post-test design was conducted with 35 undergraduate students enrolled in a fundamental English course
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1) A sample of gas (24.2 g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression‚ the gas pressure was __________ atm. A) 4.00 B) 2.00 C) 1.00 D) 8.00 E) 16.0 2) A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm. A) 1.5 B) 7.5 C) 0.67 D) 3.3 E) 15 3) A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The
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