Energy is the ability to do work. It is important because every object we produce requires energy; for example transport‚ growth‚ and development. Humans and all other things get energy from the sun. Some forms of energy are kinetic‚ potential‚ thermal‚ chemical‚ electrical‚ and mechanical. Kinetic energy is the energy of motion. Potential energy is the energy which results from a position or configuration. Thermal‚ or heat‚ energy is the energy a substance or system has related to its temperature
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N09/4/PHYSI/SPM/ENG/TZ0/XX+ 88096504 Physics standard level PaPer 1 Monday 16 November 2009 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8809-6504 16 pages © International Baccalaureate Organization 2009 – 2 – 1. N09/4/PHYSI/SPM/ENG/TZ0/XX+ The
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Energy of a Tossed Ball Project PURPOSE: The purpose for the students of the Energy of a Tossed Ball Lab involved learning how to measure the change in kinetic and potential energies as a ball moves in free fall. Since there is no frictional forces working on the ball the total energy will remain constant and the students will see how the total energy of the ball changes during free fall. HYPOTHESIS: 1. The ball has potential energy while momentarily at rest at the top of the path. 2
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Unit 11: Kinetics and Equilibrium Activated complex: an intermediate state that is formed during the conversion of reactants into products‚ the structure that results at the maximum energy point along the reaction path. Activation energy: a chemical reaction is the difference between the energy of the activated complex and the energy of the reactants. Catalyst: substance that increases the rate of a chemical reaction by reducing the activation energy‚ but which is left unchanged by the reaction
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Experiment N | Kinetics of the Depolymerization of Diacetone Alcohol via Basic Catalysis | | Ingrid Tafur -5672578 | 2/11/2011 | CHM233O Partner: Laura Marrongelli Demonstrator: Cheryl McDowall Objective The rate constant of the depolymerization of diacetone alcohol via basic catalysis was determined by monitoring the change in volume as a function of time at constant temperature of a pseudo first order reaction where the species in excess was sodium hydroxide. This was accomplished
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Clean Energy is Possible First of all‚ energy comes from many sources like oil‚ coal‚ nuclear and wood. These four sources and others are dirty energy. There is clean energy like the solar‚ wind‚ water‚ and kinetic energy. Both of them cause bad or good problems I agree with writer with some points and I disagree with hem on other points. First I agree with him with the point the one that he talks about burning wood and coal causes a lot of pollution in the atmosphere also burning oil is dirty
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Lab: Conservation of Energy Purpose: To determine and prove that the total energy will remain the same Materials: ● probe ● meter stick ● 2 by 4 wooden block ● shelf (ramp) ● binders (for elevation) Procedure: 1. determine the mass of the block 2. take your ramp and put one side on the table and the other side on the elevated stack of binders 3. set probe at the top of the ramp 4. set the probe to record position and velocity 5. measure the height of the ramp 6. slid
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NUCLEAR ENERGY VS GEOTHERMAL ENERGY RESEARCH QUESTION 1) What are the advantages of geothermal energy compared to nuclear energy in order to supply electrical energy to all residents? 2) Between nuclear energy and geothermal energy‚ which one is the best choice in making as the source of electrical energy? 3) What is the pros and cons of nuclear energy and geothermal energy? FINDING RESOURCES Geothermal Energy Definition: * Geothermal energy is thermal energy generated and
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CHEMICAL KINETICS RESULTS AND DISCUSSION The balanced equation of the reaction between sodium thiosulfate and Hydrochloric acid is: S2O32- (aq) + 2 H+ (aq) SO2 (g) + S (s) +H2O (l) Using beakers with the same diameter was very important in conducting the experiment. If different sizes were used‚ the visibility of the “x” on the paper beneath the beaker could disappear from view too early or too late than the hypothetical time depending on the depth of the solution. It was also significant
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Elastic potential energy. And the projectile concepts of the effect of changing potential into kinetic energy and for me to demonstrate my ability to apply elastic potential energy to a scientific investigation. What am I going to do and what will it prove: I am going to use an elastic band and release it from different tensions I will then measure how far it ‘flies’. Doing this will tell me the relationship between force‚ potential energy and kinetic energy. My Prediction:
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