requirements of durability having different degrees of durability relying on the properties that are desired and disclosure to the environment. For example‚ the indoor concrete floor having different requirements from the concrete that is exposed to tidal seawater. Concrete ingredients‚ they’re proportioning‚ interactions between them‚ placing and curing practices‚ and the service environment determine the ultimate durability and life of concrete Physical Durability: Aggregates are said to be unsound if
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shortest; one of the men refuses to draw. The next day‚ in spite of the lottery‚ the youngest boy is killed and fed on by the other men. The argument proposed to justify their actions is that the young boy‚ sick from malnourishment and from drinking seawater‚ would have died anyway. Also‚ were it not for the cabin boy’s body‚ the other three men would not have survived. The principle of utility is called into question with this particular case because it is used to justify the killing of the young boy
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in potable water‚ amplified by other sources of contaminant‚ could result harm to people. Hem (1989) stated that major part of fluorine present in groundwater sources‚ since it is stored in rock minerals‚ unlike chlorine that is mostly present in seawater. Thus‚ it leads us to a conclusion that significant part of fluorine intake
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Magnesium (Mg) has an atomic number of 12 and an atomic mass of 24. It has 12 protons‚ 12 neutrons (varies with isotopes)‚ and 12 electrons (if it has no charge). Magnesium has a boiling point of 1363 K (1091 C/1944 F) and a melting point of 923 K (650 C/1202 F). At room temperature magnesium is solid. You can buy magnesium for $0.83 per lb. Magnesium is a metal and belongs to the alkaline-earth metal family. Magnesium was named after the city of Magnesia; it was discovered by Bussy in 1828 A.D.
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Moon and the Sun and the rotation of the Earth. WAVES A wave is disturbance or oscillation that travels through matter/space‚ accompanied by a transfer of energy. CURRENTS An ocean current is a continuous‚ directed movement of seawater generated by the forces acting upon this mean flow‚ such as breaking waves and wind etcetera. USES IF THE OCEANS FOOD The oceans and seas are a major source of food in the shape of fish and shellfish. It is estimated that 90‚000‚000 tonnes
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(Olabarria et al‚ 2012). Rocky shore has three zone; low‚ mid and high with variety of communities living on each intertidal matrix (Vanschoenwinkel‚ 2007). High intertidal zone has rockpools and go to several months without being replenished from the seawater (McAllen & Taylor‚ 2001). Intertidal rockpool have a relative stable environment where that has few changes in terms of physical conditions when the water reaches low tide (Kemp‚ 2009). Both McAllen & Taylor (2001) and Berschick et al (1987) stated
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1. Introduction Moral reasoning is defined as “individual or collective practical reasoning about what‚ morally‚ one ought to do”. The theory introduces two moral principles: consequentialist principle‚ which determines an act’s morality by its consequences‚ and categorical principle‚ which assesses an act by looking at its certain duties and rights despite the outcomes. To some extent‚ these two principles seem to contradict each other‚ which may become obstacles for achieving reasonable actions
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SCI 207 Quiz Week 2 Quiz – correct response is marked with asterisk (*) 1. Question: A decrease in “food miles” will most likely increase the environmental impact of any given food. True False * Question 2. Which of the following statements about ground water is not true‚ according to your text? Underground aquifers hold approximately 99% of all the liquid fresh water. More than 75% of underground water has a replenishment time of centuries or more‚ making it non-renewable. Increased water
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Oceanography Test 1 Study Guide Chapter 1: Knowing the Ocean World An Ocean World • Ocean creatures provide 2% of humanity’s food • 1/3 of the world’s petroleum and natural gas are pumped from beneath the ocean floor • ~ 71% world is covered by water • Ocean – vast body of saline water that occupies the depressions of the earth’s surface • 97% of the water on or near the earth’s surface is contained in the ocean; less than 3% is held in land ice‚ groundwater‚ and freshwater
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CASE APPLICATION: FOUNDATIONS OF CONTROL Deepwater in Deep Trouble When all is said and done‚ which may not be for many years‚ it’s likely to be one of the worst environmental disasters‚ if not the worst‚ in U.S. history.61 When British Petroleum’s (BP) Deepwater Horizon off-shore rig in the Gulf of Mexico exploded in a ball of flames on April 20‚ 2010‚ killing 11 employees‚ it set in motion frantic efforts to stop the flow of oil and to initiate the long and arduous cleanup process. Although
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