Introduction Fish kills are common in natural water systems near mining operations. A major fish-kill took place in the Clark Fork in 1984. These fish kills are due to unnaturally high salinity‚ which is toxic to the indigenous fish species‚ caused by group IA and IIA metal ions in the water. As the mine’s waste seeps into the water supply‚ the salinity‚ and thus toxicity to the fish‚ increases as the various metals dissolve. In this experiment a simulated water sample from Clark Fork‚ or portion
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raceway of circular cross section in which cables are housed for protection and to prevent burning cable from spreading flames or smoke in the event of a fire. 6. Racks- A frame-like structure where patch panels‚ switches‚ and other network equipment are installed. The typical dimension is 19 inches. 7. Punch-Down Blocks- A generic name for any cross-connect block where the individual wires in UTP are placed into a terminal groove and “punched down” with special tool. The groove pierces the insulation and
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Centre Number Surname Other Names Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Secondary Education Foundation Tier June 2011 1 2 3 4 5 6 7 TOTAL Additional Science Unit Chemistry C2 CHY2F Chemistry Unit Chemistry C2 Wednesday 25 May 2011 For this paper you must have: the Data Sheet (enclosed). You may use a calculator. F 9.00 am to 9.45 am Time allowed 45 minutes Instructions Use
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Science and technology We live in the fascinating and challenging world of science. It is a world that more and more over the ages‚ and especially in the 20th century has come to affect so much of our lives. It is involved with the way we travel‚ the homes we live in and the clothes we wear‚ how we become ill and how medicine can make us better‚ and has given us fantastic means of communicating and exploring. The word science comes from the Latin "scientia‚" meaning knowledge. How do we define
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SFTY 435 Aircraft Crash Survival Analysis and Design Final Examination Return completed exam to instructor by 10:00 PM on 11 December 2012. Send to email: Name: Provide an essay type answer for the following questions. 1. Describe the effect plowing can have on crash forces when the impact surface is soft soil. Earth gouging and scooping of soil occur when the structure makes initial contact with the ground which minimize the acceleration and force levels to which the structure
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Abstract Chemical equilibrium occurs when a reversible reaction is happening forward and backward‚ at the same time by the same amount‚ is equal. Two procedures were made. First is the Effect of Concentration on Equilibrium. The solution became orange when it was diluted with ammonium hydroxide and the solution became yellow when water was added to the solution. In the second‚ Effect of Temperature on Equilibrium‚ the solution turned into a light brown gas when it was placed in the refrigerator
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(Somme).” Sources: The Battle Field and Nature of Fighting The battle of Verdun was a bloody battle that saw the Germans locate its air force and ground troops in the region. “The German attack and the subsequent battle were to last over 300 days. Flame throwers were used in large numbers for the first time to help the Germans advance the eight miles they needed to if they were to capture Verdun (Verdun).” The Germans had set up a six mile long row of machine guns‚ which cut French troops in half
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released gases are then burned off as they exit the flare stacks. As the gases or hydrocarbons are burned off‚ steam is added to the flare‚ to enhance oxygen‚ so the flare burns more efficiently. You may sometimes see black smoke coming from the flame. This occurs when an insufficient amount of steam is available to help burn the hydrocarbons sent to the flare. In order to keep the flare system functional‚ a small amount of gas is continuously burned‚ so that the system is always ready for its primary
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Set up a terrill burner. 2. Release just enough gas so the flame takes the shape of a small‚ blue cone. 3. Obtain a 1000mL beaker and fill it to the 500mL line. 4. Place the beaker over the burner with the help of a tripod and wire screen. 5. Once the water begins to boil‚ turn off the terrill burner. 6. Meanwhile‚ fill a 400mL beaker up with water to the 200mL mark. 7. Place a glass thermometer
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increase on the I-285 bypass the day after the collapse The flammability of HDPE is relatively low‚ said Tony Radoszewski‚ president of the Plastics Pipe Institute‚ a trade group based in Irving‚ Texas. HDPE would have to be exposed to a high-temperature flame for a considerable amount of time to burn‚ he said. "Somebody had to start a fire. It doesn’t combust by itself‚ it needs fuel‚" Radoszewski told CNN. "Someone had to do it. It’s not like someone would have dropped a match and it started." Investigators
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