Investigation of the rate of photosynthesis of pondweed. Research question: How does the concentration of sodium bicarbonate relate to the amount of oxygen produced by Elodea (Canadian pond weed) in the process of photosynthesis? Hypothesis: If there is an increase in concentration of sodium bicarbonate the amount of oxygen produced will increase because the sodium bicarbonate concentration will increase the carbon dioxide levels. Independent variable- Concentrations of sodium bicarbonate (8%
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do you jungle your sports‚ your social life‚ school‚ social media‚ your homework………………. and a baby. These are the issues teenage parents are facing. Not only is this hurting younger kids but also detrimental to the schools as well. School dropout rates are higher than before. Almost 3 out of 10 teen American girls will get pregnant at least once before they hit age 20‚ that’s nearly 750‚000 teen pregnancies every year. Parenthood is the leading reason that teen girls drop out of school. 8 out of
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Introductory Activity Heart Rate (pulse) Have the students find their heart pulse on the carotid artery of the neck. Use the index and middle finger to measure the pulse. Count the number of beats for 6 seconds and add a zero to the end of that number. This number represents the heart beats per minute. The heart pulse is located on either side of the wind pipe‚ next to the voice box. Allow the students to practice measuring their pulse to determine their resting heart rate. Explain that they need to
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Chemistry Coursework Rates of Reaction Investigation Introduction In this investigation I am going to be investigating the reaction between marble chips and hydrochloric acid‚ and to see what differences in the rate of this reaction arise when different concentrations of acid are used. Below is the word equation for this reaction: Calcium Carbonate + Hydrochloric Acid = Calcium Chloride + Carbon Dioxide + Water Below is the fully balanced chemical equation for this reaction. CaCo3
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Description To investigate the effect on caffeine on heart rate of water fleas and to understand the risk of high level consumption of caffeine to the health of the human circulatory system and nervous system. Preview Diagram 1: Chemical structure of caffeine Image source: http://ismaastricht.wikispaces.com/file/list The images above show the chemical structure of caffeine which has a chemical formula of C8H10N4O2. Caffeine was named by the International Union of Pure and Applied Chemistry
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Transport. In total‚ these three factors are more than half of the entire CPI. Data extracted from the December 2011’s CPI report is using year 2009 as the base period‚ which is derived from a Household Expenditure Survey. As Singapore inflation rates are published monthly‚ the Singapore Government is preventing bad or fictional speculations of future inflation. [pic] Source:
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a mass flow rate of 20‚000 kg/h. It is to be cooled by water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution‚ the river water is not allowed to experience a temperature rise above 10°C. If the steam is to leave the condenser as saturated liquid at 20 kPa‚ determine the mass flow rate of the cooling water required. Question 5: (20 points) Steam at 5 MPa and 600°C enters a two-stage 5MPa adiabatic turbine at a rate of 20 kg/s.
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Brooke Strowd AP Biology Ms. Butler 28 January 2013 I. Title: Effect of a Catalyst on Reaction Rate II. Introduction: The basis of the experiment is the enzyme; an enzyme is a biological molecule that acts as a highly selective catalyst. By combining with a substrate‚ an enzyme is able to create a new product that helps the body function. (Ex. Lactose/Lactase) A substrate is a molecule an enzyme acts upon‚ the two combine at an area called an active site. This active site allows induced fit
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are minimal changes and differences in the experiments. The sizes of the daphnia are also better to be kept around the same. Daphnia are really quick so picking something to measure in a two-hour interval made it easier to narrow it down to heart rate. Since we can control their space‚ meaning less area of movement we can see their heart better. This also meant it wouldn’t allow us to measure other things that require a larger area of movement which were the majority
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Forecasting exchange rate volatility: The superior performance of conditional combinations of time series and option implied forecasts☆ Guillermo Benavides a‚⁎‚ Carlos Capistrán b a b Banco de México‚ Mexico Bank of America Merrill Lynch‚ Mexico article info Article history: Received 26 February 2010 Accepted 5 July 2012 Available online 16 July 2012 Keywords: Composite forecasts Forecast evaluation GARCH Implied volatility Mexican peso–U.S. dollar exchange rate Regime switching
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