Before there were any true scientific dating methods‚ scientists depended on their past archives of fossils and strata in order to determine how old a newly found fossil was. However‚ it wasn’t until the mid 20th century that scientists could abandon this pathetic‚ inaccurate process and move into a more acceptable precise and detailed procedure. The old way was done by comparing one fossil to other fossils found in the same layer of the earth’s ground and studying the physical characteristics of
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------------------------------------------------- Service quality Continuity of supply In 2004‚ water supply was available on average for 18 hours each day in the West Zone of Metro Manila and 21 hours in the East Zone. According to their respective websites‚ the utility responsible for water supply in the East Zone of Metro Manila increased 24-hour water from 26% in 1997 to 98% in 2007‚ whereas in the West Zone‚ 42% of the customers had an uninterrupted supply in 2007. In a 2004 sample of 45
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The Manhattan Project was secret military project created in 1942 to produce the first US nuclear weapon. The Manhattan Project basically arrived from the ideals and fears of a Nazi Germany having access to nuclear capabilities during the war‚ and the threat of them using those nuclear weapons was at an all time high during the reign of Hitler. In order to combat this alarming problem‚ the United States government/military started a top secret program to help develop the world’s first nuclear weapon
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Dangerous yet Effective Richard Fuhrmann English 1A Dixon 09May2012 I. Introduction II. Characteristics A. Density B. Radioactive C. Fracturing III. Why we used it IV. Health Risks A. Effect B. Chances V. Environmental Effects A. Air B. Water C. Land VI. Uses A. Bi product B. Weights C. Radiation Shielding D. Ammunition E. Armor 1. DU 2. What it stops 3. What penetrates VII. DU vs. Tungsten VIII
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intracavitary radiation) In this procedure the radiation oncologist places radioactive material (usually radium‚ cesium‚ or iridium)‚ into or onto the inflicted area. The purpose is to place the radioactive material as close to the tumor as possible. This can be done in two ways: (i) The radioactive materials are put in a sealed container‚ such as a tube or
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Rosemary Hurrey EAS-101-OL009 10 July 2013 Written Assignment 1 Answer the following questions. 1.Summarize advances over time in determining the age of the Earth‚ including the importance of the discovery or radioactivity. Throughout the past few decades‚ there have been advancements in new techniques to help determine the age of the Earth. Currently scientific evidence believes that the Earth is between 4.5 and 4.6 billions years old. To help determine the age of the earth‚ radiometric dating
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1. Prehistoric Times - Beginning of the Christian Era (Black Magic) Existence of Fire Arguably the first chemical reaction used in a controlled manner was fire. However‚ for millennia fire was simply a mystical force that could transform one substance into another while producing heat and light. Fire affected many aspects of early societies. These ranged from the simplest facets of everyday life‚ such as cooking and habitat lighting‚ to more advanced technologies‚ such as pottery‚ bricks‚ and
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Potassium makes up 1.5% - 2.1% of the Earth’s crust weight. In the crystal structure of potassium‚ the closest K-K separation is 461 nm and the metallic radius spans 231 nm. Potassium has three major isotopes. One out of the three is radioactive and is called K-40. K-39 and K-41 are the other two isotopes of potassium‚ which are stable. Prior to the 18th century‚ people used potassium without realizing it. The main two uses were for soap and potash‚ which is a potassium compound formed by burning
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Nutrients…………………………………………………………………………...5 III. Different kind of pollutants………………………………………………………………6 a. Organic pollutants…………………………………………………………………6 b. Inorganic pollutants……………………………………………………………..6 c. Metals……………………………………………………………………………6 d. Radioactive Isotopes………………………………………………………………7 1. Alpha………………………………………………………………….7 2. Beta……………………………………………………………………7 3. Gamma………………………………………………………………7 4. Neutrons…………………………………………………..…………...7 IV. How are pollutants transported through water?...
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attention and research due to the environmental concerns surrounding current conventional energy sources. Issues of regulation and safety are at the forefront of all discussions involving nuclear power. (Lillington) One of the major concerns is the radioactive waste that is produced during the fission of uranium. Uranium is an element that was integrated into the planet during the Earth’s formation from the dust of shattered stars. It was discovered by Martin Heinrich Klaproth in 1789 and although
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