- You have been given access to all the materials we have used so far in class: - probes: - metersticks - motion detectors - pulleys - force sensors - springs masses - cars Using this equipment (along with any other equipment that we may have, with reasonable request).you must design an experiment that will test how changes in the kinetic and/or potential energy of system and work done on that system are related.As part of your experiment, you should think carefully about the capabilities of this equipment and how well you can use them to make useful measurements of mass, distance and time. To state your experimental goal explicitly, you will test whether either the work-energy theorem: W=Fdcosphi =Delta K+Delta U or the energy conservation law: U_(1)+K_(i)=U_(f)+K_(f) are actually supported by data gathered from your experiments. To do this you will either make a graph of Delta K+Delta Uvs W,or Delta K=Delta U When setting up your experiment, you must carefully define your system and consider whether any external forces will do work on your system. If yes, you will test the work-energy theorem; if no, you will test the energy conservation law. In either case, your measurements of mass, distance and time must allow you to calculate the work done or the kinds of energy being studied in your experiment. 1 Guiding Questions These guiding questions are provided to help you think about how to design an experiment and take measurements in that experiment. These questions are only meant to guide you; they are not meant to be answered formally. 1. What object(s) are in your system? (e.g. if you are setting up masses on a pulley is the system just the masses on a pulley? or will you also include the Earth in your system?) 2. What external forces are acting on your system?In which direction is the displacement of your system? Are these forces doing work on your system? 3. What have you learned so far about how these quantities (work, potential energy kinetic energy) are related? 4. What factors will you be ignoring as you model your results in a set of tables and graphs? Why? (For example: will you ignore air resistance or friction? Why? What might be the net impact on your results for ignoring such forces, or other effects?) Physics - Ernst
- 12) An object has a kinetic energy of 5000 J. If the velocity doubles, what is the new kinetic energy?
- 2 - Refraction Explain what happens when light moves through a transparent medium of different density 3 - Reflection
- tryou connect three 12 V batteries in series,what is the total voltage they pro a) 4V b) 12V c) 24V d) 36 V 8. What is the current a 120 V electrical outlet with 2Omega of resistance? a) 60 A b) 120 A C) 240 A d) 2A 19. What is the total resistance of a 12 V cell with 12 A of current flowing through a) 1Omega b) 12Omega C) 24Omega d) 144Omega 10. Which component of an electrical circuit does the symbol ol below represent? a) Source. b) Load. c) Switch. d) Connecting (conductive) wire. What component on an electrical circuit is used to control current flow? Source. -oad. switch. onnecting (conductive)wire.
- watch If Watch the videos and answer the questions below. Water Cycle Video 1. What is water called when it is in its invisible gas form?
