rock are removed from the Earth’s surface by natural processes such as wind or water flow‚ and then transported and deposited in other locations. While erosion is a natural process‚ human activities have dramatically increased (by 10-40 times) the rate at which erosion is occurring globally. Excessive erosion causes problems such as desertification‚ decreases in agricultural productivity due to land degradation‚ sedimentation of waterways‚ and ecological collapse due to loss of the nutrient rich
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conductors - low value for current passing Strong bases : group 1 hydroxides (ie NaOH etc)‚ or lower group 2 hydroxides Ba(OH)2. - good conductors Weak bases : NH3‚ CH3CH2NH2. - poor conductors Reaction rates Similarly‚ the rate of reaction will reveal the strength of an acid. The rate of a chemical reaction is usually proportional to the concentration of the reactants. As it is the hydrogen ions that
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AP Biology II 11/22/13 Title: The Effects of Surface Area to Volume ratio in Agar Introduction: What is an efficient way to maximize mass but minimize diffusion time in cell? Answer: An efficient way to maximize mass but minimize diffusion time in a cell is to increase its surface area. If you increase the surface area of a cell relatively to its volume‚ then the diffusion time will decrease. Materials: Agar cubes‚ bromothymol blue- pH indicator‚ vinegar‚ ruler‚ spatula‚ beaker
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regulate other systems in the body. Enzymes secreted within the digestive system have a role of breaking down food from proteins into amino acids‚ starch into glucose and fats into a mixture of fatty acids and glycerol. The main function of the respiratory system is to inhale oxygen and exhale the waste product carbon dioxide. Oxygen is breathed through the mouth and nostrils into the lungs. The gas then diffuses through the alveolar walls and into red blood cells (erythrocytes). Carbon dioxide carried
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The objective of this report is to critically explain the physiological effects of exercise on the human respiratory system and cardiovascular system. To begin with‚ I will explain the two systems‚ their specific functions and how they inter-relate. I will then go on to analyse the effects of exercise on the two systems by looking at the way in which the body deals with an increased workload‚ and any health issues that may affect this. Cardiovascular system This system is responsible for pumping
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REFERENCES Angelo‚ D. (1990). The Relationship between Late Registration and Student Persistence and Achievement. College and University‚ 65(4)‚ 316-27. Retrieved from ERIC database. A study of late registration among community college students (n=almost 39‚000 class registrations) found that late registrants were more likely to complete courses than those who registered in a timely fashion‚ and there was no appreciable difference in the two groups ’ academic performance. Full Article not available
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based medicine have become an integral part of respiratory care. With these policies in place‚ respiratory therapists are given clear‚ defined boundaries put in place by physicians‚ medical staff and hospitals to allow for flexibility in the assessment and treatment of their patients. Not only has this allowed for more freedom within their profession‚ it has also granted therapists the authority to collect clinical information regarding the respiratory status of their patients‚ assess those patients
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following rates per annum on a $20 million five-year loan : Fixed rate Floating rate Company A 12.0% LIBOR + 0.1% Company B 13.4% LIBOR + 0.6% Company A requires a floating-rate loan; company B requires a fixed-rate loan. Design a swap that will net a bank‚ acting as intermediary‚ 0.1 % per annum and that will appear equally attractive to both companies. Q.2. Company X wishes to borrow U.S. dollars at a fixed rate of interest. Company Y wishes to borrow Japanese yen at a fixed rate of
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Contents Background Research As an object becomes bigger its surface area and volume increases but the surface area to volume ratio decreases‚ this is because volume increases quicker than the surface area; as volume is three dimensional. This concept applies to cells and reaction rate because cells need to absorb their food‚ water and oxygen through their cell membrane and depending on the size of the cell membrane the rate at which it absorbs its requirements is changed. If the cell is large‚ the
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easily)‚ this is for both resting heartbeat rates and when doing activities. This is suggested in both articles; the effects of exercise on the heart and how does exercise affect you heart?. Stroke volume (ml) Heart rate (beats min−1) At rest Non-athlete 70 70 Trained athlete 100 50 Maximum exercise Non-athlete 110 190 Trained athlete 160 180 http://ceaccp.oxfordjournals.org/content/4/6/185/T2.expansion.html Resting heart rate When you are resting the heart does not need
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