Although Helium exists in the atmosphere of Earth in small quantities‚ it is one of the most common element in the universe. It is a rare gas on earth. Helium was first discovered by Pierre Janssen in the spectrum of the sun during an eclipse in 1868. It was shortly identified as an element and was named by the chemist Sir Edward Frankland and the British astronomer Sir Joseph Norman Lockyer. Helium has an atomic number of 2 and an atomic weight of 4.002602. Helium is represented by the symbol
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Gas Price Elasticity The Energy Information Administration of the Department of Energy began tracking weekly gasoline prices in 1990 by means of a survey of 800 service stations around the country. The average retail price for unleaded gasoline posted its fourth record high during the week of June 12‚ 2000‚ increasing 5 cents a gallon to an average of $1.681. The price at the pump is higher than the same period last year by 56 cents and has risen 16.2 cents over the past month (Anonymous‚ 2000)
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In his novel Mortal Engines‚ Philip Reeve is critiquing society and class‚ violence‚ and technology. To begin with‚ Reeve is displaying how unfair society is and how the wealthiest people get the recognition for making our society run smoothly. In chapter seven‚ Reeve (2001) states that the “Top Tier hangs over the city like an iron crown‚ supported by vast pillars” (p.48). This statement implies that the wealthiest people which is the top one percent in our society are very important and valuable
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(acetylsalicylic acid)‚ citric acid‚ and sodium bicarbonate. As the tablet dissolves in water‚ the bicarbonate ions in the tablet react with the hydrogen ions from the acids that are also contained in the tablet. The carbon dioxide gas produced by the reaction is what causes the bubbling that can be observed. HCO3- (aq) + H+ (aq) → H2O (l) + CO2 (g) In this investigation‚ you will design two experiments which will compare two different factors that may affect the rate of the Alka-Seltzer reaction
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only did poisonous gas change the experiences of war‚ but also the type of warfare. Instead of riding around on horses freely‚ soldiers had to use protection in order to evade the deadly chemicals. So‚ quickly‚ both sides developed gas masks. At first‚ soldiers held chemically treated cotton pads over their noses and mouths. Later they wore fabric face masks soaked in chemicals‚ and finally soldiers on both sides wore respirators with charcoal filters.("Technology.") These gas masks were the new
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dollars. After 2008 the prices suddenly fell off drastically but never have returned to what they were in 1999. The main cause for the rise and fall of prices over the years can be attributed to the supply and demand‚ while the future prices will still depend heavily on these two factors. There were a few main causes for the sharp rises in gas prices during 1999 to mid 2008 time period. The sharp rise in gas can mainly be contributed to the increase in the price of oil. The high prices of oil are
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Bayelsa‚ Cross River‚ Delta‚ Edo‚ Imo‚ Ondo and Rivers); being made up of 185 local governments of over 800 communities from 12 major ethnic groups‚ with a population of about 30 million people. The country is richly endowed with crude oil and natural gas deposits which are the main source of energy and foreign exchange earnings. “Blood may be thicker than water‚ but oil is thicker than both”‚ - Perry Anderson‚ New Left Review‚ 10‚ 2001‚ p.30. The exploration of oil in Nigeria started in 1908 with the
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The Steam Engine and its Inventors The invention and modernization of the steam engine which was one of the most important technologies in the Industrial Revolution. Without the steam engine‚ humanity would most likely still be in pre-industrial times without our current technology. Despite this‚ the first generation of steam engines were not very effective. Thomas Savery was the first person to invent a steam engine used to pump water out of mines.1 Thomas Savery’s engine was very impractical and
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Bangladesh has always been considered a natural gas rich country. It is largely available in the eastern part of the country extending from greater Sylhet down to greater Comilla‚ Noakhali and Chittagong. It has also been discovered offshore in the Bay of Bengal. Natural gas plays an important role in the country ’s economy. It is an environment friendly fuel‚ which undergoes clean and odorless combustion. It is widely used as fuel for domestic (cooking and heating)‚ industrial (metallurgical‚ ceramic
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In comparing the treatment of the myriad of enduring issues and concepts explored in Mary Shelley’s Frankenstein (1818) and Ridley Scott’s Blade Runner (1982)‚ the influence of their vastly different contexts is impossible to overlook. Despite their radically different context and genre informed approaches‚ Blade Runner and Frankenstein ultimately come to what is in essence the same conclusion - to act as cautionary tales against the consequences of transgression and to stress the importance of living
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