Group 4 Chemistry
Chemistry The chemistry experiment is aimed at testing whether the concentration of salt influences the pH level in the tested water types. The frequency of the opening and closing of the barnacles may be influenced by the salt concentration and the pH level of the water environment in which the barnacles live. Generally, seawater has a pH level of 7.7-8.3 while fresh water has a pH level of 7.0. The high pH level is a result of high concentration of OH ion in a sample. Seawater is a basic solution because the presence of basic salts in the water, such as Sodium Carbonate (Na2CO3) and Potassium Carbonate (K2CO3). Question Is there a correlation between water salinity and its pH level? Hypothesis If it is true that sea water has a higher pH level than fresh water does, then intertidal water will have a higher pH level than stream water does because of intertidal's higher salinity. Independent variable: salinity (g) Dependent variable: pH level Controlled variables: temperature of experiment environment (room temperature), amount of water for each evaporation procedure (5mL), hot plate temperature (550º C), pH meter starts at 7.0 at the beginning of the testing, same amount of water for pH testing (40 mL), ensure all testing water all free of large contaminants by filtering Materials 6 buckets 5 50mL beakers electronic balance hot plate
physics lab report group four project
Data Collection Table (1): the voltage between the plates and current flowing through the circuit as the distance between the plates (placed in the 1:1 mountain soil to water suspension) was varied. Trial Voltage (V) (V) (±0.2V) Current (I) (mA) (±0.01mA) Distance between plates (l) (cm) (±0.5cm) Length of plates (L) (cm) (±0.1cm) Width of plates (W) (cm) (±0.1cm) 5.0 0.04 7.0 5.5 3.5 2 5.0 0.07 4.0 5.5 3.5 3 4.2 0.15 .0 5.5 3.5 Table (2): the voltage between the plates and current flowing through the circuit as the distance between the plates (placed in the 1:1 garden soil to water suspension) was varied. Trial Voltage (V) (V) (±0.2V) Current (I) (mA) (±0.01mA) Distance between plates (l) (cm) (±0.5cm) Length of plates (L) (cm) (±0.1cm) Width of plates (W) (cm) (±0.1cm) 5.0 0.05 6.5 4.0 3.5 2 4.4 0.11 2.5 4.0 3.5 3 3.8 0.17 .0 4.0 3.5 Data Processing and Presentation . Conversion of measurements to SI units Table (3): the voltage between the plates and current flowing through the circuit as the distance between the plates (placed in the mountain soil suspension) was varied. Trial Voltage (V) (V) (±0.2V) Current (I) (A) (±0.00001A) Distance between plates (l) (m) (±0.005m) Length of plates (L) (m) (±0.001cm) Width of plates (W) (m) (±0.1m) 5.0 0.00004
Why is alcohol considered to be a serious problem? As many 33,000 people in the UK die from alcohol related causes each year- thats ten times as many people that die on the roads
Alcohol Should alcohol be prohibited? Why is alcohol considered to be a serious problem? As many 33,000 people in the UK die from alcohol related causes each year- that's ten times as many people that die on the roads every year. I believe this information should be presented to children at a young age (year five) to reduce the amount of alcohol related illnesses, such as alcoholic liver disease, in young people. By doing so, children will understand from a young age the health implications of excessive consumption of alcohol, and therefore will be able to make more informed decisions in future regarding alcohol consumption. This means that the number of alcohol related deaths the number of cases of alcohol-fuelled anti-social behaviour is likely to decline. This should also be presented to my peers as they are in the age that has a major problem in binge drinking this has increased due to a variety of reasons many of these reasons Contents: What is alcohol? ..................................................................................Pg3 Alcohol through history and its portrayal in the media................. Pg4 Arguments for prohibition of alcohol............................................... Pg6 Arguments Against prohibition of alcohol....................................... Pg9 Why was the Prohibition of Alcohol in America unsuccessful? ....Pg11 Common
Group 4 project
Electricity: Electrostatics: * Not moving charges. * Material like amber, when rubbed, can move small objects * The technical term is that the 'balloon' or likewise, is electrically charged * There are two types of charge: - positive - & negative * if we are looking at atoms, protons are positively charged and electrons are negatively charged * An object that is not charged is referred to as neutral. * A neutron has no charges * In most situations we don't look at atoms, we look at whole objects * If an object has more electrons that usual it will be negatively charged. * If it has less electrons, it will be positively charged. * In most cases we can use friction and rub electrons from one object to another to charge it. * It is important to note: - electrons do the moving, NOT protons - the charge doesn't last long due to interactions with air - it is not restricted to solids * electrostatic precipitation - in chimneys. Smoke and dust are ionized and stick to the metal plates in a chimney * the basic technique of charging small particles is how photocopiers work Charging an object * can be easy or hard depending on the conductivity of the object. * In a conductor electrons can move very easily. E.g. metals have delocalized electrons that move easily. * In an insulator electrons are NOT free. * Things you can CHARGE are insulators. Charging by
Supply Chain Management for Kinley Project
2010 PROJECT ANALYSTS ALTAYE TEKELMICHAEL DIAN VEGAWATI MERRY OKTARINA TABLE OF CONTENTS . INTRODUCTION 2 2. DISTRIBUTION CENTRE LOCATION 2 2.1 United Kingdom 3 2.2 Slovakia 3 2.2 Germany 3 3. MAKE OR BUY ANALYSIS 4 3.1 Capacity and Knowledge 4 3.2 Product 4 3.3 Cost Perspectives 4 3.4 Benefits 4 3.5 Disadvantages 5 4. TYPE OF RELATIONSHIP 5 4.1 Procurement Strategy 5 4.2 Retailer Supplier Partnership 6 5. RISK MANAGEMENT 7 5.1 Natural Disaster 7 5.2 Terrorist Attack 8 5.3 Market Change 8 5.4 Port Delays 8 5.5 Supplier Performance 8 6. RISK MITIGATION STRATEGIES 8 6.1 Dealing with Unknown-Unknown Situation 8 6.2 Global Risk 8 6.3 Control 9 7. RECOMMENDATION 9 APPENDIX 1 10 APPENDIX 2 13 APPENDIX 3 14 SOURCES 15 . INTRODUCTION Kinley is one of the leading manufacturers in peripherals and connectivity solutions for users of computers and consumer electronics in the world. Since its establishment, Kinley has become the market leader across its production line. Nowadays, with a single European distribution centre in United Kingdom, where it was largest market in Europe and meets market demands for 2.000 to 3.000 ships to send to Europe. However, as one of the fastest growing companies in the world, Kinley Management's forecast of market demands will be higher in the future. In order to response market needs, Kinley would anticipate future
IB GR4 Project / Global Warming
IB SCIENCE GROUP 4 PROJECT GLOBAL WARMING Does acid rain cause hardness in water? Does carbon dioxide affect plant growth? Is there a difference between the convection current of acid rain and distilled water? Ali Ercingöz Burcu Erdogan Deniz Kiratlioglu Can Atalay Ege Zorlu Arman Onart Subjects and Group Members Chemistry: (Ali Ercingöz, Can Atalay) Does acid rain cause hardness in water? Biology: (Burcu Erdogan, Ali Ercingöz, Ege Zorlu) Does carbon dioxide affect plant growth? Physics: (Can Atalay, Deniz Kiratlioglu, Arman Onart) Is there a difference between the convection current of acid rain and distilled water? GLOBAL WARMING Global warming is the effect of greenhouse gases on the earth. Greenhouse gases are the emissions that rise into the atmosphere and trap the sun's energy, keeping the heat from escaping. Because of the global warming, the air temperature near the earth's surface rose by 0.9ºC during the last 100 years. This causes the sea levels to rise, increase the intensity of extreme weather events and increases the amount of acid rain. As a result of these newly formed conditions, unprecedented natural disasters and damages the natural life such as agricultural yields, species, extinctions and the range of disease vectors arise. While these are occurring, people are trying to defend their future both socially
Ecosystems: Photosynthesis
Photosynthesis (explained) One of the most common producers is green plants. These organisms absorb light energy from the sun or chemical reactions to convert carbon dioxide to organic matter. Green plants can also use water to convert carbon dioxide to organic compounds such as sugar glucose. The result of this is that it releases oxygen as a by-product. This process driven by light energy is photosynthesis. Using the method of photosynthesis, plants are able to create every complex organic molecule which form their body by using mineral nutrients such as sulphur, phosphorus, potassium and nitrogen which can be retrieved from either soil or water. A green pigment called chlorophyll is one of the molecules that are used to absorb light energy in photosynthesis. It is obvious to be able to identify which plants photosynthesise by looking at they're colour. If it is green, then it photosynthesises. Some examples of these types of plants include the beach grass, shrubs, and maritime forest plants found on Plum Island. There is a huge range of plants that can photosynthesise, whether it be microscopic bacteria or extremely large trees. In every ecosystem, there are always active producers that photosynthesise. AIM The aim of this experiment will be to test the rate of photosynthesis using Gardenia Augusta Magnifica in a warmer environment against a cooler
homeostasis and sports - experiments measuring the effects of exercise on the body
Aim To Investigate the effect of the game squash on the blood glucose level. Hypothesis - blood glucose level is usually affected by an activity or exertion such as a sport. Squash is a very exerting game and so a lot of glucose is required in providing energy while playing the game. The result is that the blood glucose shall fall. However homeostasis involves positive feedback and negative feedback. In this case , after a fall in the blood glucose level, positive feedback shall work to regulate the blood glucose level , by breaking down glycogen in the liver to glucose. Therefore the original glucose level shall be attained. However blood glucose level can also be influenced by the type of food that an individual has taken preceding the test.this then determines whether positive feedback or negative feedback shall occur Apparatus * A Glucometer kit * Squash rackets * Squash balls * Dettol * Cotton wool * Stopwatch Procedure . samples of blood of 2 volunteers were obtained using a sterilised lancets 2. The blood sample of an individual was then placed on the film that was provided by the glucometer kit 3. The film was inserted in the glucometer slot and the blood glucose level value was read off the screen and recorded 4. step 2 and 3 were repeated for the second volunteer 5. Afterwards, the game squash was started, and immediately the stopwatch too 6.
Our practical was about examining the reaction of an enzyme in a particular type of food, in which the enzyme break down food and digest the existing proteins inside the materials (food). And to investigate the rate of the enzymes reaction when its get
Report for Group 4 Object Name: Mena Nadum Class: IB07 Date: 05/19/09 Introduction: Our practical was about examining the reaction of an enzyme in a particular type of food, in which the enzyme break down food and digest the existing proteins inside the materials (food). And to investigate the rate of the enzyme's reaction when its get influenced by different types of pH levels. The enzyme we chose for our lab is the Trypsin. The reason why we chose this particular enzyme is first, for the fact that Trypsin has a very high activity which means its reaction is fast and it digests proteins completely in short period of time. Second, it could still react with a wide range of different pH levels. Our experiment was based on the theory that implies: reactions of the enzyme with very high or very low pH level will be very slow. While the reaction reach its high speed if the pH level is at 8 which is called as the optimum of the rate of reaction of the Trypsin. Apparatus The material that is used to perform the experiment is Milk solution. pH solutions: pH 3, pH 4, pH 5, pH 7, pH 8, pH 9 and pH 10. 0.1 g of Trypsin enzyme. Spectra Photometer. A device that maintains the temperature constant. Procedure At the beginning of the experiment, we prepared all the pH solutions needed. And then we started performing our lab by first, mixing the enzyme with one pH level and then
Waves and friction
? Aim "To investigate if the performance of a swimmer is affected by the waves occurring in the swimming pool from other swimmers?" Background knowledge A wave is a periodic disturbance whereby energy is conveyed from one place to another in a medium without the transfer of matter. In this experiment of ours the main properties that will affect the swimmer are; Amplitude Wave length and frequency. We say this because the higher the amplitude the more the energy the wav possesses and the aster the frequency the more momentum the wave has at the wave front. Thus with this I mind we hypothesize: "The performance of a swimmer is directly influenced by their interaction with waves" We first got our idea of our investigating after observing the waves produced by a swimmer and a boat. The frontal curved waves caused by the forward thrust of the body and the triangular end waves caused partially by the propellant were always visible. We suspected these waves to have an impact on the body and thus decided to investigate. Due to the hypothetical nature of this experiment, no numerical data was collected. The variables that were considered were: Variables Independent variable > Speed of the swimmer Dependant variable > Force acting on swimmer from other waves Controlled variable > The swimmers Apparatus * Camcorder * 2 Swimmers: Shahbaz Mir and Dennis