KE = KE = 2500 J 6. Think about what you already know about energy. 1. for the other two cups, filling one with 200 g of wet sand and one with 200 g of dry sand. This is based on the equation .5mv^2=.5kx^2, where m is the mass of the duck, v is the velocity of the duck in the air, k is the spring constant of the spring in the base of the duck, and x is the displacement that the spring is compressed. Use a thermometer to check the hot water bath temperature, which should be near 100C Explain your reasoning: Which samples will heat up faster? As the height decreases the GPE will ________ while its kinetic energy increases. upright near the end of the lever, maybe taped against a wall. This would force the carts to repel each other and not stick together during collision. This experiment will be exploring, in depth, Newton's second law. We know that the law of conservation of energy says that energy can never be created or destroyed, so what happened? All objects have momentum, even if it is zero, and momentum cannot be lost. Considerations: These are not questions to be answered as a separate part of the lab report. This would force the carts to repel each other and not stick together during collision. If you measure it in grams, simply divide the number by 1000 to get kilograms . Measure 200 mL of water with the graduated cylinder and transfer it to an. You are never to simply list answers to considerations. cup, allow the reading to stabilize. B is a filter feeder or a detritivore. compact mass. PDF Physics 201 Lab 8: The Conservation of Linear Momentum I feel like its a lifeline. If the cart maintains at a constant speed, then the cart will have an increase in acceleration. 5) 5 mL of sugar was added to the solution and a balloon was placed over the opening of the bottle to minimize the loss of any gas from the system. d. Remove the aluminum wire sample and empty the calorimeter. The Photogate sensors were used to measure the velocity of each cart as it moved from the explosion site. The purpose of this lab is to test substances and to determine the physical and chemical properties of substances. If you want the answer key, you can dm me or you can comment so it'll . Kinetic Energy Lab - Prezi 3. On the Logger. of tape at these points to serve as targets. After these values were calculated the ratio of the final kinetic energy to the initial kinetic energy was calculated in order to compare the values. Additionally, the lab will teach how to properly use Dynamic Tracks, which will be a valuable lab skill in the future. As the data is representative of a graphical parabola, a parabolic function was utilized to be the best fit trendline. The carts were placed on the track so that the magnet containing ends of the carts were facing each other. Ionic bonding is a crucial topic to understand within general chemistry reactions. Before you start, make a prediction: Will the GPE at the top be the same as the KE at the bottom? program. On the other hand, the evidence shows that the 12 pound bowling ball in Ball- Mass 2 has the velocity (m/s) of 3.12, the kinetic energy of 23 (J), and the average bowling points of 4 . (3 points) Covalent bond, methane. Place the calorimeter (no lid) on the balance and tare the balance. This was done by causing elastic collisions, inelastic collisions, and explosions of carts on a Dynamic Track. These results are shown in the table below. If using one heat lamp, put the six cups in a tight Record the final temperature value for each cup in Table A. D. lab notebook. calorimeter into a beaker or other secondary container to prevent wobbling. One you have found this distance, focus more carefully on this position so that you can take a measurement from the edge of the table to the position where the duck initially contacted the ground. Objectives (3): - Explore the relationship between kinetic and gravitational energies - Analyze the importance of kinetic energy in falling objects. One cart was a standard cart with a rod on top. The balls have equal kinetic energies (k1=k2)(k_1=k_2)(k1=k2), but ball 1, which is coming from the left, is moving faster than ball 2 (v1>v2)(v_1>v_2)(v1>v2). If there is a difference, distinguish between what happens . Execute Energy Forms And Changes Lab Answer Key Pdf within a couple of moments by simply following the guidelines below: Pick the template you will need from our library of legal form samples. All rights reserved. They were joined together by the Velcro, and the plunger was pushed into the plunger cart. <>>> The work-kinetic energy theorem states that the change in the kinetic energy of a particle during a displacement is equal to the work done by the resultant force on the particle during this displacement. Ionic bonds are formed between a metal and a non-metal. If you pick up a 10 N book a distance of 2 meters, how much gravitational potential energy did you . QUESTION: How do mass and the type of material affect thermal energy transfer? Attached to the track were two Photogate sensors. The Photogate sensors were used to measure the velocity of each cart as it moved from the explosion site. Do this at least five times and take the average. So, now that it's made, I hope it helps a lot of people to get work done especially if they're really behind! Precision is the closeness of repeated measurements. 5. The overall goal of this activity is to provide the students with a diagram that can help them learn and memorize the different characteristics associated with chemical bonding. We'll study two main types of energy today. Discussion: The Work/Energy Equation says "The work done on an object by the net force on it equals the object's change in kinetic energy." or, in symbols: Next, we need to do some calculations to find GPE and KE. Amanda has taught high school science for over 10 years. Record this in your notebook. If the speed of the object increases, its kinetic energy increases. The nonconservative work is the _________________________, Conservation of change in kinetic energy formula, Lab 9: Centripetal Force & Rotational Dynamics, Mathematical Methods in the Physical Sciences. 5. El restaurante Dalia: Dnde (cenar / contestar) enter answer t y Daniel anoche? releases or absorbs thermal energy by chemical processes. b) Load the HCl and NaOH burets with HCl and NaOH solutions, respectively. These ions attract each other and create an ionic bond. At the __________ the potential energy is considered equal. Record the equilibrium temperature in Table B. This friction converts some of the energy of the ball into heat, making the value measured for KE less than expected. : an American History - Chapters 1-5 summaries; Analysis of meaning and relevance of History from the millennial point of view; Newest. PDF Half-Life Data-Teacher Answer Key - US EPA When does the ball have the most kinetic energy? The ______________ is happening in the presence of conservative forces like gravitational forces or the force in a spring. We can say that one form of energy (potential energy) is converted in another form of energy (kinetic energy). Using the kinetic energy equation. I've been adding the answer key to my World History and Biology course. 2. However, when the group was compared to other groups conducting the same experiment, the displacement of their marshmallow was the shortest. The main objective of this experiment is to carry out qualitative analysis to identify metal cations in unknown solution 1. The other cart was a plunger cart, which contained a spring activated plunger that could push the carts apart. In class we learned about the principles of acceleration, time, and velocity. Lab Report: Acids and Bases. by Alondra Garza - Prezi next 5 minutes, while you prepare the calorimeter in the next steps. The analysis of. b) Swirl the thermometer slightly, and confirm that the thermometer is well within the water. The final condition tested was explosions. One atom borrows one or more electrons from another atom. PDF Lab: Thermal Energy Transfer 3 0 obj Meter sticks should be. These sources of error include human error such as not keeping the acceleration constant, changing the force placed on the van, and by starting or stopping the timer late. F. Be sure to wear protective gloves when handling all metal samples! Additionally the lab taught how to properly work with carts on a Dynamic Track. HELP ASAP ITS 8th GRADE SCIENCE BUT IT DOESN'T HAVE THAT OPTION The graph shows the kinetic energy (KE) and potential energy (PE) of a bouncing ball o ver a period of 9 seconds. What was determined to be true was that the structure that contained the right configuration in producing a high amount of force proved to have the greater amount of displacement of the marshmallow. They are hints. Accuracy is how close the average of the measured values are to the actual value. Dry sand 100 19 63 44 Total score: ____ of 27 points (Score for Question 1: ___ of 3 points) 1. J. Reassemble the calorimeter and position the thermometer. temperature change, T, for each sample. The major finding was the return bounce height depended the most on the balls mass and from where it was dropped. temperature. Measure the mass of your ball on the balance. Energy Skate Park: Basics - Conservation of Energy | Kinetic Energy The fact that the kinetic energy ratio was very far from one shows that the kinetic energy is not conserved in explosions. This would give the velocity of each cart. endstream endobj 500 0 obj <>stream Were the values for KE and GPE the same? Measure out approximately 50 g of aluminum wire using a mass balance. The kinetic energy before and after the system was then computed using the above kinetic energy equation. The hole each rock made is measured for its depth. These resources will help you complete the assignment. The _____________________ is the change in mechanical energy, In the presence of nonconservative forces (like friction), the total mechanical energy is not conserved. Simply put, his law describes the relationship between the mass of an object, the acceleration of an object, and the force needed to move it. The experiment was executed by dropping three different balls of different masses at 100, 75, 50, and 25 centimeters. Place the pH probe in the beaker and record the pH in the data table. Lab: Kinetic Energy Assignment: Lab Report Instructions Click the links to open the resources below. At the maximum height h, the object's GPE will be a _______. Make sure you record the mass in kilograms in your notebook. xZY6~xJek|$:um@k(#i,Q@!1aKT&or^Z7m[;m7?obfO 3ne`U3E@-v6zy Close the lid snugly and make sure the thermometer is immersed E. PART II: Examining the Effect of Material Type on Thermal Energy Transfer and Specific Heat If using two lamps, place three cups under each. c. Observe the increase in temperature every 20 seconds for 3 minutes, or until the bundle Relationship between initial and final velocities in an elastic collision . The volume is determined by measuring with a ruler and by water displacement. At the maximum height h, the object's _____ will be a maximum. in comparison to white Americans? Course Hero is not sponsored or endorsed by any college or university. H. Assemble a coffee cup calorimeter. Physics Lab - Work & Kinetic Energy (uses Science Workshop TM Interface) Purpose: The purpose of this lab is to compare the work done on an object with the object's change in kinetic energy. Enjoy!! It goes from 414.2 kilometers per hour (kph) to 0 kph in 2.8 seconds. 2 0 obj a. Joule (J) 5. C. Measure the change in temperature for different materials and mass. Ionic bonds are also known as electrovalent bonds. A practices intracellular or extracellular digestion. 10 mL graduated cylinder - 2 g sodium chloride spoon - 2 g sodium bicarbonate conductivity apparatus distilled water in a wash bottle. In experimental situations the numbers will not come out to be exactly perfect, but if the ration of the momentums is close to one it will indicate that momentum has been conserved. 2. Its like a teacher waved a magic wand and did the work for me. = Coil the wire If students have difficulties differentiating the characteristics associated with covalent and ionic bonding, they will suffer with future topics and other branches of chemistry. SAMPLE LAB REPORT SCI141: Biology Sections Introduction All cells are bound by a functional cell membrane. %PDF-1.5 However, the analysis of kinetic energies proved that kinetic energy is not always conserved. We traded experiments and materials with another group, so each group got a chance to watch an unbiased group perform their experiment. This means that. If that ball rolls down the hill however, all the GPE is converted to KE when it gets to the ground and is moving fast. The Logger. 4. v . I have a template, that is simple and clear to understand. PART I: Examining the Effect of Material and Mass on Thermal Energy Transfer This cart also had a rod to assist in readings. Create your account. (2015,[online]). Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass. stated britannica editor Erik Gregerson. Lesson: Types of Chemical Reactions, Project: Thermal Energy and Chemical Reactions Students apply knowledge of technological design, as well as techniques of project-based learning in order to investigate the relationship between chemical processes and the release of thermal energy. Think of total energy like a pizza. PHYS207 Lab Report Template 4 - Work-Kinetic Energy Theorem Because the percent differences were relatively close to zero the momentum of the system was conserved. Edgenuity Answer Key! In physics momentum is always conserved. %PDF-1.5 A 50 kg ball traveling at 5 m/s would have kinetic energy. If needed, place the calorimeter into a beaker or other secondary container to prevent wobbling. I made this because I was having to do all the research and I would've loved it, if someone had already done this. Momentum cannot be lost in a collision. Repeat Steps 68d for the in Table B. 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