needs to ignite: Heat‚ Fuel‚ and Oxygen 6. List and discuss the various clues that flames and smoke can offer the investigator in the arson ivestigation. Flames and smoke are probably two of the main things that investigators use to judge an investigation. The color of the flames can indicate many different things like temperature and use of particular accelerants. The direction of the burn patterns left by the flames can tell a great deal. Smoke can show us how fast the fire began‚ how long it was
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of change. As humans‚ a majority are afraid of change which had increased the anxiety of the people during this time. An example of one of these artworks that depict anxiety is “The Flame” by Jackson Pollock. This painting was drawn in 1938 (around 20 years after WWI) and is an abstract painting that depicts a flame to represent an idea of the somewhat recent war. The painting contains many streaks of red‚ black‚ and white. These colors symbolize many different feelings but when these colors are
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top‚ then add the olive oil. 3. Season with salt and pepper‚ then roast for about 20 minutes. Shake the pan and roast again for an additional 15 minutes. 4. After roasting‚ pour everything into a soup pot and add the vegetable broth. Place over high flame and bring to a boil. 5. Once boiling‚ reduce to a simmer and
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The Burning of Primary and Secondary Alcohols Year 11A Chemistry By Jarrod Ahern Abstract The aim of the investigation was to determine whether primary alcohols use less energy than secondary alcohols for fuel. The hypothesis is if primary alcohols are heated and results are taken‚ they produce a lesser heat of reaction then secondary alcohols. The method used was to find the average bond energies of three relating primary and secondary alcohols and compare it with the average theoretical
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The element francium has a lot of physical properties. Like francium atomic number is 87. Francium’s atom is (233)g.m ol and its destiny is unknown. Its melting point 27 celsius and its boiling point is 677 celsius. Francium is also very reactive to flame retardant. The element francium is very pretty. Some people would even make jewelry ( mostly earrings ). Francium was discovered by “Marguerite Perey”. Francium was discovered in 1939. This discovery was inspired by “Gregor Mendel”. Some
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permit to be lighted‚ ignited or started‚ a fire in a grill or barbecue for the purpose of cooking food on a balcony of any building containing two (2) or more dwelling units. "Barbecue includes any metal frame for cooking over heat or flame‚ whether such heat or flame is produced by gas‚ electricity‚ wood or otherwise." Background During the summer season residents are likely to enjoy cooking on barbecue grills. In most of condos and apartment‚ barbecuing on balcony has been prohibited because
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to withstand abrasive substances. High-quality rail uniforms give rail workers freedom of movement while they are doing their jobs. Rail workers need to be protected from burns. Flame retardant uniforms project rail workers from fire hazards. Flame retardant coveralls are a necessity. Rail workers should also wear flame retardant shirts and jackets. Base layers keep rail workers warm. High-quality uniforms
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of the ring clamp so that the bottom of a crucible sitting in the clay triangle is about 1 cm above the burner. This will ensure that the crucible will be in the hottest part of the flame when the Bunsen burner is lit. Light the Bunsen burner and brush or gently heat the bottom of the crucible with the burner flame for about one minute. Turn off the Bunsen burner and allow the crucible to cool. Using crucible tongs to handle the crucible‚ measure the mass of a clean‚ dry‚ empty crucible and its
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was the preparation of the medium‚ the bottom of the BHIA dish was labeled with the bacterium number‚ initials‚ and section; then divided into four quadrants. The second step‚ we used the septic technique to transfer a small amount of culture with a flame-sterilized inoculating loop to the first quadrant‚ flamed and cooled the loop again then transferred a small amount of the culture from the first quadrant to the second using the quadrant streaking method as illustrated on page 18 of the lab manual
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immediate reaction‚ the acid got absorbed. Hard to rip. No immediate reaction‚ the hydroxide got absorbed. Hard to rip. It didn’t absorb any water‚ lying like a bubble on top of the fabric. Data analysis: The wool performed the best in each test. In the flame test it didn’t catch fire only blacken the wool‚ in the acid/base test it had no effect to the wool and the wool was hard to rip afterwards‚ and in the water absorption test it didn’t absorb any water it just lied on top of the fabric like a
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