Ecology Pyramids 1. a. Sunlight b. 3190000kcal per square meter per year 2. 3. a. .8% b. Photosynthesis 4. By eating the organisms in the previous level 5. 400o0 kcal 6. 7. 8. 90% of energy is lost as heat as it is transferred through trophic levels 9. .6% 10. .09% 11. Only a tiny fraction of the original energy remains. The biomass would have to increase substantially if this system were to support another trophic level beyond the hawk 12. Since little energy is available for a single
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shipment’s entire journey. The ‘atmosphere’ being controlled is that in direct contact with the surface of the fresh product‚ and includes attempts to control oxygen‚ nitrogen‚ carbon dioxide‚ water vapor‚ and temperature. These ‘controlled atmospheres’ can be created either by: a) Adding pure gaseous carbon dioxide or nitrogen b) Low oxygen exhaust of hydrocarbon combustion or c) Using the natural effects of respiration (grain‚ mould or insects) to reduce oxygen or increase carbon dioxide
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Latest Invention: Tea Bag that Uses Nanotechnology to Clean Drinking Water One of the latest inventions developed by researchers from Stellenbosch University in South Africa is a one of a kind "tea bag" that makes use of nanotechnology to clean drinking water‚ making it free from contaminants and bacteria. It would be interesting to note that the "tea bag" is made of the same material that is used to make the actual tea bags. The only difference is that in the Stellenbosch researchers’ invention
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osmium-catalyzed aminohydroxylation of olefins was investigated in detail by density functional theory (B3LYP/6-31G(d)) calculations in the gas phase and with the CPCM-solvent model. A systematic variation of the catalyst system (OsO4 and various nitrogen sources) and the substrate’s electronic situation was conducted. Activation barriers could be correlated to Hammett values and linear Gibbs free energy relations could be determined. Experimental results‚ which indicated an electronic influence
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produces only nitrogen‚ water and a few quantity of nitrogen monoxide. The nitrogen monoxide formation and degradation mechanism is well known but kinetics of key reactions require to be validated against experimental data. This work consists thus in the structure investigation of several ammonia flames burning in different conditions of pressure (P)‚ equivalence ratio (Φ) and initial hydrogen percentage(%H2). The aim of this work is to find the optimal conditions to produce as less of nitrogen monoxide
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 Name: Corrina Marcus Date: 7/27/13 Student Exploration: Water Pollution Vocabulary: bacterial pollution‚ nutrient pollution‚ sediment pollution‚ toxic pollution‚ water pollution Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Water pollution is the addition of harmful substances to water. Some of these substances are found at home. What household chemicals might be harmful if not disposed of properly? Clorox‚ batteries‚ and cleaning supplies 2
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How fast is your reaction? Part 1 – How temperature affect the rate of reaction Chemical equation Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCL → MgCl2 + H2 Graph Conclusion and questions 1. What factors/variables did you keep the same in this experiment? * We kept the same volume of hydrochloric acid (10 cm3) and the magnesium ribbon (5cm) because that way we could get a fair test experiment. We also repeated
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g Save Question 6 (2.7 points) What is the molar mass of dinitrogen pentoxide? Question 6 options: 108 g/mol 30 g/mol 150 g/mol 94 g/mol 44 g/mol Save Question 7 (2.7 points) How many nitrogen atoms are present in 3.00 × 10–3 moles of nitrogen gas‚ N2? Question 7 options: 1.81 × 1019 3.61 × 1019 1.20 × 1021 1.81 × 1021 3.61 × 1021 Save Question 8 (2.7 points) A sample of water has a mass of 50.0 g.
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compounds such as peat or mineral deposits‚ or manufactured through natural processes (such as composting) or chemical processes (such as the Haber process). Fertilizers typically provide‚ in varying proportions‚ the three major plant nutrients (nitrogen‚ phosphorus‚ and potassium)‚ the secondary plant nutrients (calcium‚ sulfur‚ magnesium)‚ and sometimes trace elements (or micronutrients) with a role in plant nutrition: boron‚ chlorine‚ manganese‚ iron‚ zinc‚ copper‚ and molybdenum. This new book
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produce the most common pollutants‚ nitrogen oxides‚ gaseous hydrocarbons‚ and carbon monoxide‚ as well as particles of matter like lead. When nitrogen oxides combine with hydrocarbons they form other types of pollutants‚ like ozone‚ peroxyacetylnitrate which stings the eyes‚ and nitrogen dioxide which forms when nitrogen oxides react with oxygen. In cities where transportation is the major cause of pollution‚ nitrogen dioxide colors the sky brown‚ because the nitrogen dioxide has combined with other
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