Life 100 years ago From 1909‚ the world population soared from 1.7 to 6.4 billion people. Also the average life expectancy was only 47 years back then! There used to be a minimal amount of cars in the streets‚ people probably used to walk more often and just 8000 automobiles in the United States could be found there with only 144 miles of paved roads. The maximum speed limit was 10 mph. Even though the air didn’t use to be so polluted by cars and other vehicles 100 years ago‚ I think that now
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EXPERIMENT 1: WATER CRYSTALIZATION OBJECTIVES: To determine the percentage of water in aluminium sulphate hydrate To calculate the water of crystallization for aluminium sulphate hydrate To prove that a hydrate solution will lose some of it mass after heated INTRODUCTION A hydrated salt is a crystallize salt molecule that is weakly attached to a certain number of water molecules. Salt is created when an acid’s anion (negative ions) and a base’s cation (positive ions) are combined to produce
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Making Water Turbines Most Energy Efficient How does a wind turbine’s output vary with wind pressure (height of water)‚ the flow rate‚ size of the motor‚ and type of blade? Introduction There are many types of energy used today: Fossil fuels‚ coal‚ nuclear energy‚ solar energy‚ geothermal energy‚ hydrogen energy‚ hydroelectric energy‚ wind energy‚ and biofuels and biomass. Non-renewable energy sources such as fossil fuels and coal are diminishing since it cannot be recycled‚ unlike wind energy
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Water Conservation Will there be enough water for a more crowded world? The adult human uses on average about 100 gallons of water a day. Only about 2.5% of earth’s water is fresh and only 1% is actually attainable for usage. The available water on earth has not changed. The same water we have today has been recycled for millions of years‚ we are not gaining any more. The time to do something is now. In this essay I would like to remark on the past‚ present‚ and future of water conservation
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GEOS 3310 Lecture Notes: Water Pollution Dr. T. Brikowski Spring 2012 file:waterQuality.tex‚v (1.33‚ November 14‚ 2011)‚ printed March 30‚ 2012 Water Pollution 1 Introduction Water pollution is the “degradation of water quality as measured by biological‚ chemical‚ or physical criteria.” Common sources of groundwater pollution are listed in Keller [Table 14.3‚ 2011]. Typical pollutants include: • Oxygen-demanding waste: materials that produce a high BOD [Fig. 11.2‚ Keller‚ 2000]
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Jakub Hribal World History AP Hr. 2 Mr. Russum 10/12/14 Ccot Rome 100-600 C.E. Between 100 and 600 C.E.‚ Rome underwent significant cultural and political changes. Culturally‚ the empires religious beliefs had changed‚ resulting in the predominance of Christianity. Politically‚ Rome’s economy divided. As for continuities‚ paterfamilias and women’s right remained the same throughout the time period. Religion was a large part of the roman culture‚ and made a major change to Christianity. When
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unknown solution C ABSTRACT Liquid C and solid C were both extracted from unknown solution by first using chemically active liquid-liquid extract‚ followed by vacuum filtration. Liquid C and solid C were then purified with the use of simple distillation and recrystallization respectively. Through the process of recrystallization‚ the percentage purity of solid C was found to be 6.01%. The melting point range of purified solid C was 117.0 – 119.0C while the boiling point of liquid C was found to
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Worksheet 2 Intro. To C Programming by Yanique Campbell An assignment submitted in partial fulfillment of the requirements for the course Intro. To C Programming Instructor: Mr. Rohan Simpson Date: March 18‚ 2014 Department of Communication and Information Technology Bethlehem Moravian College. Question 1 A program is required to read a customer’s name‚ a purchase amount and a tax code. The tax code has been validated and will be one of the following: • 0 tax exempt (0%) • 1 state
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dissimilar water samples and test them in several different methods to see which water sample had the best quality. The tests that were used were that of: A faecal coliforms test‚ phosphate test‚ nitrates test‚ pH test‚ dissolved oxygen test and a total dissolved solids test. It was thought out that filtered water would hold the highest standards‚ the most sanitary water samples was that of tap water‚ then followed by filtered‚ then tank (rain) water and creek water respectively. (The three water samples
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Vitamin C Molecule Investigation Thomas Philpott Introduction Vitamin C (ascorbic acid) is an essential component of human nutrition‚ as it is an antioxidant that the body requires. Having a deficiency in Vitamin C can lead to scurvy‚ a disease characterized by abnormalities in human bones and teeth. Fruits and vegetables are common sources of Vitamin C‚ notably oranges and citrus fruits. Cooking and the application of heat destroy the vitamin so such fruits must be raw in order to obtain the
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